Quarterlytics / Energy / Oil & Gas Exploration & Production / Diamond Offshore Drilling Inc.

Diamond Offshore Drilling Inc.

do · NYSE Energy
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Ticker do
Exchange NYSE
Sector Energy
Industry Oil & Gas Exploration & Production
Employees 1001-5000
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FY2015 Annual Report · Diamond Offshore Drilling Inc.
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ANNUAL REPORT

DIAMOND OFFSHORE DRILLING , INC .

FINANCIAL HIGHLIGHTS ((cid:2)DOLL ARS IN MILLIONS(cid:2))

2015

2014

2013

Revenue     .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

  $ 2,419    $

2,815 $

2,920

Depreciation & Amortization    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

Operating Expenses .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

493

2,713

456

2,242

Earnings Before Interest, Taxes, Depreciation & Amortization ( EBITDA )  .    .    .  

1,060

1,139

Net (Loss) Income     .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

Capital Expenditures     .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

(274)

831

387

2,033

388

2,119

1,190

549

958

Cash and Investments  .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .   

  $

131

   $

250 $

2,097

Drilling & Other Property & Equipment, Net    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

Total Assets    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

Long - term Debt    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

Shareholders’ Equity     .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .    .  

6,379

7,165

1,995

4,113

6,946

8,021

2,244

4,451

5,467

8,391

2,494

4,637

ABOUT THE COMPANY

Diamond Offshore is a leader in offshore drilling, providing contract drilling services to the energy 
industry around the globe with a total fleet of 32 offshore drilling rigs, including one rig under 
construction. Diamond Offshore's fleet consists of 23 semisubmersibles, of which one harsh environ-
ment semi is under construction, four dynamically positioned drillships, and five jack-ups. Diamond 
Offshore’s headquarters are in Houston, Texas. Primary regional offices are located in Brazil, Scotland, 
and Singapore, with local offices in other countries as required to support operations. Approximately 
3,400 people work for the Company on board our rigs and in our offices. Diamond Offshore’s 
common stock is listed on the New York Stock Exchange under the symbol “DO.”

ABOUT THE COVER

The Ocean BlackLion is currently working in the Gulf of Mexico.

Our Fleet (as of February 16, 2016)

DRILLSHIPS

Ultra-deepwater Rigs (7,500+ Ft.)

¬  

¬  

¬  

¬  

Ocean  
BlackHawk  
12,000 Ft.  
DP; 15K; 5M; 7R 
GOM

Ocean  
BlackHornet  
12,000 Ft.  
DP; 15K; 5M; 7R 
GOM

Ocean  
BlackLion  
12,000 Ft.  
DP; 15K; 5M; 7R 
GOM

Ocean  
BlackRhino  
12,000 Ft.  
DP; 15K; 5M; 7R 
GOM

SEMISUBMERSIBLE RIGS

Ultra-deepwater Rigs (7,500+ Ft.)

J 

J 

J 

N 

J 

J 

J 

J 

Ocean 
Confidence  
10,000 Ft.  
DP; 15K; 4M; 6R  
Canary Islands
(Cold  
stacked)

Ocean  
Courage 
10,000 Ft.  
DP; 15K; 4M; 6R  
Brazil  

Ocean  
Endeavor  
10,000 Ft.  
VC; 15K; 4M; 5R 
Romania

Ocean  
GreatWhite 
10,000 Ft.  
DP; 15K; 4M; 6R  
South Korea

Ocean  
Monarch  
10,000 Ft.  
VC; 15K; 4M; 5R  
Australia

Ocean  
Valor 
10,000 Ft.  
DP; 15K; 4M; 6R 
Brazil 

Under 
Construction

Ocean  
Baroness  
8,000 Ft.  
VC; 15K; 4M; 4R  
GOM
(Cold 
stacked)

Ocean  
Rover 
8,000 Ft.  
VC; 15K; 4M; 5R  
Malaysia 

Deepwater Rigs (5,000 – 7,500 Ft.)

l 

l 

l 

l 

l 

l 

l 

Ocean  
Apex  
6,000 Ft.  
VC; 15K; 4M; 5R    
Malaysia

Ocean  
Onyx  
6,000 Ft.  
VC; 15K; 4M; 5R 
GOM 
(Cold 
stacked)

Ocean  
America  
5,500 Ft.  
SP; 15K; 3M; 5R   
Malaysia 
(Cold 
stacked) 

Ocean  
Star 
5,500 Ft.  
VC; 15K; 3M; 4R  
GOM
(Cold 
stacked) 

Ocean  
Valiant 
5,500 Ft.
SP; 15K; 3M; 4R  
UK 

Ocean  
Victory  
5,500 Ft.  
VC; 15K; 3M; 5R 
Trinidad

Ocean  
Alliance  
5,250 Ft.  
DP; 15K; 3M; 4R 
GOM
(Cold 
stacked)

Mid-water Rigs (450 – 5,000 Ft.)

J  

J  

J  

Ocean  
Quest 
4,000 Ft.  
VC; 15K; 3M; 4R 
Malaysia 
(Cold 
stacked)

Ocean  
General 
3,000 Ft.  
3M; 4R
Malaysia
(Cold 
stacked)

Ocean  
Patriot  
3,000 Ft.  
15K; 3M; 5R  
UK

J  

Ocean  
Guardian  
1,500 Ft.  
15K; 3M; 5R 
UK

J  

Ocean  
Princess  
1,500 Ft.  
15K; 3M; 4R 
UK
(Cold 
stacked)

J  

Ocean  
Vanguard  
1,500 Ft.  
15K; 3M; 4R 
UK
(Cold 
stacked)

J  

Ocean  
Nomad  
1,200 Ft. 
3M; 4R
UK
(Cold 
stacked)

J  

Ocean  
Ambassador  
1,100 Ft. 
3M; 4R
Mexico  

JACK-UP RIGS

K  

Ocean  
Scepter 
350 Ft.  
IC; 15K; 3M  
Mexico

K  

Ocean  
King  
300 Ft.  
IC; 3M 
GOM
(Cold 
stacked)

K  

Ocean  
Nugget 
300 Ft.  
IC   
GOM
(Cold 
stacked)

K  

Ocean  
Spur 
300 Ft.  
IC  
Malaysia
(Cold 
stacked)

K  

Ocean  
Summit  
300 Ft.  
IC  
GOM
(Cold 
stacked)

KEY

IC  Independent-Leg Cantilevered Rig 

 (cid:204) DP Dynamically Positioned
 (cid:204) GOM US Gulf of Mexico 
 (cid:204)
 (cid:204) SP Self Propelled
 (cid:204) VC Victory Class
 (cid:204) 3M Three Mud Pumps
 (cid:204) 4M Four Mud Pumps 

15K  15,000 PSI Well Control System

 (cid:204) 5M Five Mud Pumps 
 (cid:204)
 (cid:204) 4R Four Ram Blowout Preventer 
 (cid:204) 5R  Five Ram Blowout Preventer
 (cid:204) 6R Six Ram Blowout Preventer 
 (cid:204)

7R  Seven Ram Blowout Preventer

JACK-UP RIGS

SEMISUBMERSIBLE RIGS

DRILLSHIPS

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MID-WATER  RIGS
 (450 – 5,000 Ft.)

DEEPWATER  RIGS
 (5,000 – 7,500 Ft.)

ULTRA-DEEPWATER  RIGS
 (7,500+ Ft.)

RATED  WATER  DEPTH

For semisubmersible rigs and drillships, the indicated 
depth reflects the operating water depth capacity for 
each drilling unit. In many cases, individual rigs are 
capable of achieving, or have achieved, greater water 
depths. In all cases, floating rigs are capable of working 
successfully at greater depths than their rated water 
depth. On a case-by-case basis, a greater depth capacity 
may be achieved by providing additional equipment.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Energy markets have 
given no respite for 
investors as the collapse 
of the price of Brent oil 
continued through the 
year and into early 2016. 
The price per barrel of 
crude has fallen by over 
40 percent since the 
start of 2015, and despite 
a modest rebound  
from the low, the 
economics of deepwater   
remain challenged. 

In response to market conditions 
and the expectation that a price 
recovery is not yet on the horizon, 
E&P companies have slashed  
their capital budgets by more than 
20 percent, in aggregate, for a 
second consecutive year. The result 
across the industry has been a 
dramatic shortage of contracting 
opportunities for new ultra-
deepwater drillships entering the 
market as well as for drilling rigs 
rolling off of existing contracts. 

LETTER TO  
SHAREHOLDERS

Marc Edwards
President and Chief Executive Officer

 
 
 
 
 
 
 
 
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At Diamond Offshore, 
we have proactively 
taken a number  
of important steps to 
position our  
company for the 
difficult industry 
conditions we face.

CONTRACTS 

All of our newbuild ultra-deepwater 
drillships have had long-term 
contracts in place upon delivery 
from the shipyard. Our first unit, 
the Ocean BlackHawk, began 
operating in the Gulf of Mexico in 
May 2014, and in April 2015 it was 
joined by the Ocean BlackHornet, 
with both rigs working for Anadarko 
on five-year terms. In May 2015  
the Ocean BlackRhino began its 
inaugural contract, which has since 
concluded, and it will begin a  
new three-year contract with Hess 
in Q4 2016. Our fourth and final 
newbuild drillship, the Ocean 
BlackLion, has recently started  
a four-year contract with Hess, 
also in the US Gulf of Mexico.

Having all of our drillships working 
in the same region creates 
economies of scale by having key 
personnel and support infrastructure 
centrally located here on the Gulf 
Coast, near our corporate head- 
quarters in Houston. Additionally, 
the Gulf of Mexico is one of the 
lowest-cost offshore drilling 
markets in the world. 

Our final newbuild unit, a harsh 

environment semisubmersible, the 
Ocean GreatWhite, is scheduled for 
delivery mid-year 2016, and her 
three-year contract with BP will 
commence off South Australia in 
Q4 2016. 

Across the industry, many of 

our competitors’ newbuild rigs will 
be delivered without immediate 
prospects for work. For Diamond 
Offshore, however, all of our newbuild 
units are contracted at attractive 
rates into 2019 and beyond.

COST 
CONTROL 

While continuing to invest in safety, 
equipment maintenance and training, 
we are aggressively controlling 
costs, including the unfortunate 
necessity of reducing the size of our 
workforce. We have lowered comp- 
ensation across the organization,  
cut capex wherever prudent, and 
successfully negotiated discounts 
with our vendors on capital 
equipment. The full economic 
benefits of cost reductions are now 
positively impacting results.

 
 
 
 
 
 
 
 
 
 
 
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CASH

In prior years we built a sizable cash 
reserve and increased our revolving 
credit facility to 1.5 billion dollars 
in anticipation of the capital 
obligations associated with our 
newbuild program. With only one 
remaining shipyard payment,  
we have liquidity well in excess of 
remaining capital needs.

In February 2015 we announced 

that the Board of Directors had 
chosen not to declare a special 
dividend, which had an impact of 
over $400 million per year on capital 
flexibility. In February 2016, we 
announced the elimination of the 
regular quarterly dividend, which 
was previously $0.125 per share. 
This will add additional liquidity 
for the company of $69 million per 
year. Given the weakness in industry 
fundamentals, we believe it is 
prudent to conserve cash, and by 
doing so we will improve our 
flexibility to take advantage of 
strategic opportunities that may 
materialize.

Even with Diamond 
Offshore’s conservative 
financial management 
and solid contract 
backlog, difficult 
market conditions have 
taken a toll on 2015 
financial results.

During 2015, in response to the 

continued deterioration of the 
market fundamentals in the oil and 
gas industry, we determined that 
the carrying values of 17 of our rigs 
were impaired, and therefore, 
results for full-year 2015 included  

 
 
 
 
 
 
 
 
 
 
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a noncash impairment charge of 
$860 million, or $5.05 per share 
after tax.

For the year ended December 31, 

2015, Diamond Offshore reported  
a net loss of $274 million, or a loss of 
$2.00 per diluted share, compared 
to net income of $387 million,  
or $2.81 per diluted share, in 2014. 
Revenues for full year 2015 were 
$2.419 billion compared to $2.815 
billion in 2014.
  We have scrapped or sold 13 rigs 
since the beginning of 2014; 11 rigs 
are currently cold stacked, and we 
have classified four jack-up units  
as held-for-sale. Additional rigs may 
be cold stacked or scrapped before 
the market recovers.

The challenging road 
ahead for our industry 
does not deter  
our optimism about  
the future of  
Diamond Offshore.

Despite the disappointing 
financial results for the year, we 
accomplished a number of important 
achievements. We delivered record 
breaking performance as it relates 
to both safety and uptime, and our 
early efforts to position the company 
for a protracted downturn by 
reducing costs began to impact the 
bottom line.

I am particularly proud that 

our organization delivered the  
best safety performance in 2015 in 
the company’s history, achieving  

 
 
 
 
 
 
 
 
 
 
 
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a 34 percent improvement on our 
normalized safety stats over the 
prior year. We have not yet achieved 
our target of an injury free work-
place, but the accomplishments of 
2015 represent important progress.

Along with working more safely, 
we delivered 97 percent operational 
efficiency across the entire fleet in 
the fourth quarter—which we define 
as the percentage of time that 
equipment was available to work 
without unanticipated downtime.
  We continue to look for 
innovative ways to further reduce 
costs and drive efficiencies for  
the benefit of our clients and our 
shareholders. This philosophy  
is what led to an important 
announcement of the industry’s 
first subsea Pressure Control by  
the Hour™ construct.

 
 
 
 
 
 
 
 
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Diamond Offshore has 
announced an industry  

 “first-of-its-kind” 

performance-based 
service and maintenance 
arrangement with  
GE for the provision of 
pressure control.

GE Oil & Gas, as the original 
equipment manufacturer, will now 
be a key stakeholder in improving 
the availability and performance  
of the blowout preventers on 
Diamond Offshore’s 6th-generation, 
ultra-deepwater drillships—the 
Ocean BlackHawk, Ocean 
BlackHornet, Ocean BlackRhino 
and Ocean BlackLion. 
  While the cost of deepwater 
drilling has come down, we believe 
that all stakeholders in the offshore 
drilling industry must improve 
efficiency. To improve the health of 
our industry, we have to help our 
clients lower both costs and cycle 
times. One of the largest impediments 
to delivering the required economic 
returns for deepwater projects 
today relates to the poor uptime 
availability of the BOP.

The new service model, which we 
refer to as the Pressure Control  
by the Hour model, transfers full 
responsibility for maintenance 
service, management and supply of 
spare parts, equipment upgrades, 
continuous certification and data 
monitoring back to the original 
equipment manufacturer. Under 
the arrangement, Diamond Offshore 
will pay a dayrate, similar to how 
we are paid by our own customers.  
If downtime occurs because of the 
BOP, GE will not be paid and will 
therefore feel the financial impact—
similar to the way the driller and 
the operator are affected today. 
Under our ten-year agreement,  
GE employees will be permanently 
stationed on our rigs, but Diamond 
will retain operation and control  
of the BOP itself. Not only will GE 

 
 
 
 
 
 
 
 
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maintain the equipment, but they 
will buy back Diamond Offshore’s 
BOP systems aboard our four 
drillships for a total of $210 million.
These performance incentives 

will drive further improvement  
in deepwater drilling efficiencies by 
motivating all parties to prioritize 
availability. GE, as the original 
equipment manufacturer, will be in 
a performance-based alliance that 
leverages the scale of their data, 
predictive analytics including 
condition based monitoring and 
maintenance that will proactively 
improve the availability of our BOPs.

We will continue to 
look for opportunities 
to generate long-term 
value for shareholders.

In the current down cycle, and the 
resulting competitive environment, 
we will continue to pursue ways to 
differentiate our Company amongst 
our peers. Pressure Control by  
the Hour is just one example of the 
Diamond Difference—a new way of 
thinking that will drive continuous 
improvement in offshore drilling 
and further differentiate Diamond 
Offshore’s 6th-generation assets 
from the rest of the pack.
  While we cannot predict the 
timing of market recovery, we do 
know with certainty that we are  
in a cyclical business and eventually 
our clients’ priorities will shift 
from reducing spending to growing 
deepwater production and reserve 
replacement. The industry may look 
different in the future, but supply 
and demand will eventually come 
back into balance. With our 
conservative capitalization and 
strong liquidity position, we are 
confident that the Company will be 
able to weather this downturn  
and emerge well positioned for the 
inevitable rebound. We will 
continue to focus on conducting 
safe operations, delivering quality 
performance for our clients, 
rationalizing costs, and utilizing 
our capital efficiently.

Marc Edwards
President and Chief Executive Officer

 
 
 
 
 
 
 
 
 
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  UNITED STATES SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 

FORM 10-K 

[ X ]    ANNUAL  REPORT  PURSUANT  TO  SECTION  13  OR  15(d)  OF  THE 

SECURITIES EXCHANGE ACT OF 1934 

For the fiscal year ended December 31, 2015 

OR 

[   ]   TRANSITION  REPORT  PURSUANT  TO  SECTION  13  OR  15(d)  OF  THE 

SECURITIES EXCHANGE ACT OF 1934 

For the transition period from  .....................  to  ............................  

Commission file number 1-13926 

DIAMOND OFFSHORE DRILLING, INC. 
(Exact name of registrant as specified in its charter) 

(State or other jurisdiction of incorporation or organization)  

   Delaware 

76-0321760 
  (I.R.S. Employer Identification No.) 

15415 Katy Freeway 
Houston, Texas  77094 
(Address and zip code of principal executive offices) 

(281) 492-5300 
(Registrant’s telephone number, including area code) 

Securities registered pursuant to Section 12(b) of the Act: 

          Title of each class 

Common Stock, $0.01 par value per share 

Name of each exchange on which registered 
New York Stock Exchange 

Securities registered pursuant to Section 12(g) of the Act:  None 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities 
Act.    Yes [ (cid:151) ]    No[   ]  

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of 
the Act.    Yes [     ]    No[ (cid:151) ]  

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) 
of  the  Securities  Exchange  Act  of  1934  during  the  preceding  12  months  (or  for  such  shorter  period  that  the 
registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 
days.    
Yes [ (cid:151)  ]    No [   ] 

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if 
any,  every  Interactive  Data  File  required  to  be  submitted  and  posted  pursuant  to  Rule  405  of  Regulation  S-T 
during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such 
files).Yes [ (cid:151)  ]    No [   ] 

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained 
herein,  and  will  not  be  contained,  to  the  best  of  registrant’s  knowledge,  in  definitive  proxy  or  information 
statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  [(cid:151)] 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated 
filer, or a smaller reporting company.  See definitions of “large accelerated filer,” “accelerated filer,” and “smaller 
reporting company” in Rule 12b-2 of the Exchange Act.  (Check one): 

Large accelerated filer [(cid:151) ] 

Accelerated filer [   ] 

 
 
 
 
 
 
 
 
                           
 
 
 
 
    
 
 
 
 
 
 
 
 
          
 
 
 
 
 
 
 
 
Non-accelerated filer [    ]   
(Do not check if a smaller reporting company) 

Smaller reporting company [   ] 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). 
Yes [   ]    No [ (cid:151) ]  

State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by 
reference to the price at which the common equity was last sold as of the last business day of the registrant’s most 
recently completed second fiscal quarter. 

As of June 30, 2015 

$1,658,817,269 

Indicate  the  number  of  shares  outstanding  of  each  of  the  registrant’s  classes  of  common  stock,  as  of  the  latest 
practicable date. 

As of February 16, 2016 

Common Stock, $0.01 par value per share  

137,158,706 shares 

DOCUMENTS INCORPORATED BY REFERENCE 

  Portions  of  the  definitive  proxy  statement  relating  to  the  2016  Annual  Meeting  of  Stockholders  of 
Diamond  Offshore  Drilling,  Inc.,  which  will  be  filed  within  120  days  of  December  31,  2015,  are 
incorporated by reference in Part III of this report. 

1 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
FORM 10-K for the Year Ended December 31, 2015 

TABLE OF CONTENTS  

Cover Page ............................................................................................................................................................ 1 

Document Table of Contents ............................................................................................................................... 2 

      Page No. 

Part I 
Item 1.  Business ............................................................................................................................................... 3 

Item 1A.  Risk Factors ........................................................................................................................................ 8 

Item 1B.  Unresolved Staff Comments ............................................................................................................ 21 

Item 2. 

Properties .......................................................................................................................................... 21 

Item 3.  Legal Proceedings ............................................................................................................................. 21 

Item 4.  Mine Safety Disclosures ................................................................................................................... 21 

Part II 
Item 5.    Market for the Registrant’s Common Equity, Related Stockholder Matters and 

  Issuer Purchases of Equity Securities ............................................................................................. 21 

Item 6. 

Selected Financial Data .................................................................................................................... 23 

Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations ..... 24 

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk ..................................................... 44 

Item 8. 

Financial Statements and Supplementary Data ............................................................................. 46 

Consolidated Financial Statements ..................................................................................................... 48

Notes to Consolidated Financial Statements ...................................................................................... 53 

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure .... 84 

Item 9A.  Controls and Procedures ................................................................................................................. 84 

Item 9B.  Other Information ............................................................................................................................ 85 

Part III 

Certain information called for by Part III Items 10, 11, 12, 13 and 14 has been 
omitted as the Registrant intends to file with the Securities and Exchange 
Commission not later than 120 days after the end of its fiscal year a definitive Proxy 
Statement pursuant to Regulation 14A. 

Part IV 
Item 15.  Exhibits and Financial Statement Schedules ................................................................................. 85 

Signatures............................................................................................................................................................ 86 

Exhibit Index ...................................................................................................................................................... 88 

2 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 1.  Business. 

  General 

PART I 

Diamond  Offshore  Drilling,  Inc.  is  a  leader  in  offshore  drilling,  providing  contract  drilling  services  to  the 
energy industry around the globe with a fleet of 32 offshore drilling rigs, which includes four jack-up rigs that we 
are  marketing  for  sale.    Our  fleet  consists  of  23  semisubmersibles,  including  the  Ocean  GreatWhite,  which  is 
under  construction,    five  jack-ups  and  four  dynamically  positioned  drillships,  including  the  Ocean  BlackLion 
which was delivered in the second quarter of 2015.  See “– Our Fleet – Fleet Enhancements and Additions” and “– 
Our Fleet  – Floater Fleet Status.”  

 Unless the context otherwise requires, references in this report to “Diamond Offshore,” “we,” “us” or “our” 
mean  Diamond Offshore  Drilling,  Inc.  and our  consolidated  subsidiaries.    Diamond  Offshore  Drilling,  Inc. was 
incorporated in Delaware in 1989. 

Our Fleet 

Our  diverse  fleet  enables  us  to  offer  a  broad  range  of  services  worldwide,  primarily  in  the  floater  market 

(ultra-deepwater, deepwater and mid-water). 

Floaters.  A floater rig is a type of mobile offshore drilling unit that floats and does not rest on the seafloor.  
This asset class includes self-propelled drillships and semisubmersible rigs.  Semisubmersible rigs consist of an 
upper working and living deck resting on vertical columns connected to lower hull members. Such rigs operate in 
a “semi-submerged” position, remaining afloat, off bottom, in a position in which the lower hull is approximately 
55 feet to 90 feet below the water line and the upper deck protrudes well above the surface.  Semisubmersibles 
hold  position  while  drilling  by  use  of  a  series  of  small  propulsion  units  or  thrusters  that  provide  dynamic 
positioning,  or  DP,  to  keep  the  rig  on  location,  or  with  anchors  tethered  to  the  sea  bed.    Although  DP 
semisubmersibles  are  self-propelled,  such  rigs  may  be  moved  long  distances  with  the  assistance  of  tug  boats.  
Non-DP,  or  moored,  semisubmersibles  require  tug  boats  or  the  use  of  a  heavy  lift  vessel  to  move  between 
locations. 

A  drillship  is  an  adaptation  of  a  maritime  vessel  that  is  designed  and  constructed  to  carry  out  drilling 
operations by means of a substructure with a moon pool centrally located in the hull.  Drillships are typically self-
propelled  and  are  positioned  over  a  drillsite  through  the  use  of  a  DP  system  similar  to  those  used  on 
semisubmersible rigs.   

Our  floater  fleet  (semisubmersibles  and  drillships)  can  be  further  categorized  based  on  the  nominal  water 

depth for each class of rig as follows: 

Category 
Ultra-Deepwater 
Deepwater 
Mid-Water 

Rated Water Depth (a) 
(in feet) 
7,501 to 12,000 
5,000 to 7,500 
400 to 4,999 

Number of Units in Our Fleet 

12  (b) 
7   
8  

(a)  Rated  water  depth  for  semisubmersibles  and  drillships  reflects  the  maximum  water  depth  in  which  a 
floating  rig  has  been  designed  to  operate.    However,  individual  rigs  are  capable  of  drilling,  or  have 
drilled, in marginally greater water depths depending on various conditions (such as salinity of the ocean, 
weather and sea conditions).   
Includes the Ocean GreatWhite, a harsh environment semisubmersible rig under construction.   

(b) 

See “ – Fleet Enhancements and Additions” for further discussion of our rig under construction. 

3 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Floater Fleet Status 

The following table presents additional information regarding our floater fleet at February 16, 2016: 

Rig Type and Name 
ULTRA-DEEPWATER: 
  Semisubmersibles (8): 
  Ocean GreatWhite 
  Ocean Valor 
  Ocean Courage 
  Ocean Confidence 
  Ocean Monarch 
  Ocean Endeavor 
  Ocean Rover 
  Ocean Baroness 

  Drillships (4): 
  Ocean BlackLion 

Rated Water 
Depth 
(in feet) 

Attributes 

Year Built/ 
Redelivered (a) 

Current Location (b) 

Customer (c) 

10,000 
10,000 
10,000 
10,000 
10,000 
10,000 
8,000 
8,000 

DP; 6R; 15K 
DP; 6R; 15K 
DP; 6R; 15K 
DP; 6R; 15K 
15K 
15K 
15K 
15K 

Q2 2016 
2009 
2009 
2001/Q2 2015 
2008 
2007 
2003 
2002 

South Korea 
Brazil 
Brazil 
Canary Islands 
Australia 
Romania 
Malaysia 
GOM 

Under construction/BP (d) 
Petrobras 
Petrobras 
Cold stacked 
Quadrant Energy 
Demobilizing/Actively Marketing 
Murphy Exploration 
Cold Stacked 

12,000 

DP; 7R; 15K 

Q2 2015 

GOM 

  Ocean BlackRhino 

12,000 

DP; 7R; 15K 

  Ocean BlackHornet 
  Ocean BlackHawk 

DEEPWATER: 
  Semisubmersibles (7): 
  Ocean Apex  
  Ocean Onyx  
  Ocean Victory 
  Ocean America 
  Ocean Valiant 
  Ocean Star 
  Ocean Alliance 

MID-WATER: 
  Semisubmersibles (8): 
  Ocean Quest 
  Ocean Patriot  
  Ocean General 
  Ocean Guardian 
  Ocean Princess 
  Ocean Vanguard  
  Ocean Nomad 
  Ocean Ambassador 

12,000 
12,000 

DP; 7R; 15K 
DP; 7R; 15K 

15K 
15K 
15K 
15K 
15K 
15K 
DP; 15K 

15K 
15K 

15K 
15K 
15K 

6,000 
6,000 
5,500 
5,500 
5,500 
5,500 
5,250 

4,000 
3,000 
3,000 
1,500 
1,500 
1,500 
1,200 
1,100 

2014 

2014 
2014 

2014 
2013 
1997 
1988 
1988 
1997 
1988 

1973 
1983 
1976 
1985 
1975 
1982 
1975 
1975 

GOM 

GOM 
GOM 

Customer acceptance/Hess 
Corporation 
Contract preparation/Hess 
Corporation 
Anadarko 
Anadarko 

Malaysia  
GOM  
Trinidad & Tobago 
Malaysia 
North Sea/U.K. 
GOM 
GOM 

Warm Stacked/Woodside 
Cold Stacked 
BP Trinidad 
Cold Stacked 
Premier Oil 
Cold Stacked 
Cold Stacked 

Malaysia 
North Sea/U.K. 
Malaysia 
North Sea/U.K. 
North Sea/U.K. 
North Sea/U.K. 
North Sea/U.K. 
Mexico 

Cold Stacked 
Shell 
Cold Stacked 
Warm Stacked/Dana 
Cold Stacked 
Cold stacked 
Cold Stacked 
PEMEX 

DP 

6R 

=  Dynamically Positioned/Self-Propelled  7R  = 

2 Seven ram blow out preventers 

=  Six ram blow out preventer 

15K  = 

15,000 psi well control system 

Attributes 

(a)  Represents  year  rig  was  (or  is  expected  to  be)  built  and  originally  placed  in  service  or  year  rig  was  (or  is 
expected to be) redelivered with significant enhancements that enabled the rig to be classified within a different 
floater category than originally constructed. 

(b)  GOM means U.S. Gulf of Mexico.   
(c)  For ease of presentation in this table, customer names have been shortened or abbreviated.  
(d)  Rig is contracted for future work upon completion of construction and commissioning. 

Jack-ups.  Jack-up rigs are mobile, self-elevating drilling platforms equipped with legs that are lowered to the 
ocean floor. Our jack-ups are used for drilling in water depths from 20 feet to 350 feet. The water depth limit in 
which  a  particular  rig  is  able  to  operate  is  principally  determined  by  the  length  of  the  rig’s  legs.    The  rig  hull 
includes the drilling equipment, jacking system, crew quarters, loading and unloading facilities, storage areas for 
bulk and liquid materials, heliport and other related equipment.  A jack-up rig is towed to the drillsite with its hull 
riding in the sea, as a vessel, with its legs retracted. Once over a drillsite, the legs are lowered until they rest on the 
seabed and jacking continues with the legs penetrating the seabed until they are firm and stable, and resistance is 
sufficient  to  elevate  the  hull  above  the  surface  of  the  water.  After  completion  of  drilling  operations,  the  hull  is 
lowered until it rests in the water and then the legs are retracted for relocation to another drillsite.  All of our jack-
up rigs are equipped with a cantilever system that enables the rig to cantilever or extend its drilling package over 
the aft end of the rig.   

4 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
As  of  February  16,  2016,  the  Ocean  Scepter,  a  350-foot  jack-up  drilling  rig  built  in  2008,  was  operating 
offshore Mexico for PEMEX (cid:16) Exploración y Producción, or PEMEX,  under a long-term contract.  In addition, 
we have four other jack-up rigs, which we are currently marketing for sale.      

Fleet Enhancements and Additions.  Our long-term strategy is to upgrade our fleet to meet customer demand 
for advanced, efficient and high-tech rigs by acquiring or building new rigs when possible to do so at attractive 
prices, and otherwise by enhancing the capabilities of our existing rigs at a lower cost and shortened construction 
period than newbuild construction would require.  Since 2009, commencing with the acquisition of two newbuild, 
ultra-deepwater semisubmersible rigs, the Ocean Courage and Ocean Valor, we have committed over $5.0 billion 
towards  upgrading  our  fleet.    In  mid-2015,  we  took  delivery  of  the  Ocean  BlackLion,  the  last  of  four  ultra-
deepwater  drillships  constructed  in  South  Korea  during  our  most  recent  fleet  enhancement  cycle.    The  Ocean 
GreatWhite  remains  under  construction  in  South  Korea  with  delivery  of  the  new  rig  expected  to  occur  in  mid- 
2016.    Upon  completion  of  acceptance  testing,  the  rig  is  expected  to  commence  drilling  operations  offshore 
Australia later this year. 

We  will  evaluate  further  rig  acquisition  and  enhancement  opportunities  as  they  arise.    However,  we  can 
provide no assurance whether, or to what extent, we will continue to make rig acquisitions or enhancements to our 
fleet.    See  “Management’s  Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations  –  Cash 
Flow and Capital Expenditures” in Item 7 of this report. 

Pressure Control by the Hour.  In February 2016, we entered into a ten-year agreement with GE Oil & Gas, 
or GE,  to provide  services with  respect  to certain blowout  preventer  and  related  well control  equipment  on  our 
four  newbuild  drillships.   Such  services  include  management  of  maintenance,  certification  and  reliability  with 
respect to such equipment.  In connection with the services agreement with GE, we will sell the equipment to a 
GE affiliate and will lease back such equipment over separate ten-year operating leases.   

Markets 

The principal markets for our offshore contract drilling services are the following: 

the Middle East; 

(cid:120)  South America, principally offshore Brazil, and Trinidad and Tobago; 
(cid:120)  Australia and Southeast Asia, including Malaysia, Indonesia and Vietnam;  
(cid:120) 
(cid:120)  Europe, principally in the United Kingdom, or U.K., and Norway; 
(cid:120)  East and West Africa; 
(cid:120) 
the Mediterranean; and 
(cid:120) 
the Gulf of Mexico, including the U.S. and Mexico. 

We  actively  market  our  rigs  worldwide.  From  time  to  time  our  fleet  operates  in  various  other  markets 
throughout  the  world.    See  Note  17  “Segments  and  Geographic  Area  Analysis”  to  our  Consolidated  Financial 
Statements in Item 8 of this report. 

Offshore Contract Drilling Services 

Our contracts to provide offshore drilling services vary in their terms and provisions. We typically obtain our 
contracts  through  a  competitive  bid  process,  although  it  is  not  unusual  for  us  to  be  awarded  drilling  contracts 
following  direct  negotiations.    Our  drilling  contracts  generally  provide  for  a  basic  fixed  dayrate  regardless  of 
whether  or  not  such  drilling  results  in  a  productive  well.    Drilling  contracts  may  also  provide  for  reductions  in 
rates  during  periods  when  the  rig  is  being  moved  or  when  drilling  operations  are  interrupted  or  restricted  by 
equipment  breakdowns,  adverse  weather  conditions  or  other  circumstances.    Under  dayrate  contracts,  we 
generally pay the operating expenses of the rig, including wages and the cost of incidental supplies.  Historically, 
dayrate  contracts  have  accounted  for  the  majority  of  our  revenues.    In  addition,  from  time  to  time,  our  dayrate 
contracts may also provide for the ability to earn an incentive bonus from our customer based upon performance. 

The  duration  of  a  dayrate  drilling  contract  is  generally  tied  to  the  time  required  to  drill  a  single  well  or  a 
group of wells, in what we refer to as a well-to-well contract, or a fixed period of time, in what we refer to as a 
term  contract.    Many  drilling  contracts  may  be  terminated  by  the  customer  in  the  event  the  drilling  unit  is 
destroyed or lost, or if drilling operations are suspended for an extended period of time as a result of a breakdown 
of equipment or, in some cases, due to events beyond the control of either party to the contract.  Certain of our 
contracts  also  permit  the  customer  to  terminate  the  contract  early  by  giving  notice;  in  most  circumstances  this 
5 

 
 
 
 
 
 
 
 
 
  
 
 
requires the payment of an early termination fee by the customer.  The contract term in many instances may also 
be extended by the customer exercising options for the drilling of additional wells or for an additional length of 
time, generally at competitive market rates and mutually agreeable terms at the time of the extension.  In periods 
of decreasing demand for offshore rigs, drilling contractors may prefer longer term contracts to preserve dayrates 
at  existing  levels  and  ensure  utilization,  while  customers  may  prefer  shorter  contracts  that  allow  them  to  more 
quickly  obtain  the  benefit  of  declining  dayrates.  Moreover,  drilling  contractors  may  accept  lower  dayrates  in  a 
declining market in order to obtain longer-term contracts and add backlog.  See “Risk Factors – We may not be 
able  to  renew  or  replace  expiring  contracts  for  our  rigs,”  “Risk  Factors  –  Our  business  involves  numerous 
operating  hazards  that  could  expose  us  to  significant  losses  and  significant  damage  claims.    We  are  not  fully 
insured  against  all  of  these  risks  and  our  contractual  indemnity  provisions  may  not  fully  protect  us,”  “Risk 
Factors – We can provide no assurance that our drilling contracts will not be terminated early or that our current 
backlog  of  contract  drilling  revenue  will  be  ultimately  realized,”  “Risk  Factors  –  We  may  enter  into  drilling 
contracts  that  expose  us  to  greater  risks  than  we  normally  assume”  and  “Risk  Factors  –  We  self-insure  for 
physical damage to rigs and equipment caused by named windstorms in the U.S. Gulf of Mexico” in Item 1A of 
this  report,  which  are  incorporated  herein  by  reference.    For  a  discussion  of  our  contract  backlog,  see 
“Management’s Discussion and Analysis of Financial Condition and Results of Operations – Market Overview – 
Contract Drilling Backlog” in Item 7 of this report, which is incorporated herein by reference.              

Customers  

We  provide  offshore  drilling  services  to  a  customer  base  that  includes  major  and  independent  oil  and  gas 
companies and government-owned oil companies.  During 2015, 2014 and 2013, we performed services for 19, 35 
and 39 different customers, respectively.  During 2015, 2014 and 2013, one of our customers in Brazil, Petróleo 
Brasileiro S.A., or Petrobras (a Brazilian multinational energy company that is majority-owned by the Brazilian 
government), accounted for 24%, 32% and 34% of our annual total consolidated revenues, respectively.  During 
2015,  ExxonMobil  and  Anadarko  each  accounted  for  12%  of  our  annual  consolidated  revenues.    No  other 
customer accounted for 10% or more of our annual total consolidated revenues during 2015, 2014 or 2013.  See 
“Risk Factors — Our industry is highly competitive, with oversupply and intense price competition” in Item 1A of 
this report, which is incorporated herein by reference.   

As of February 8, 2016, our contract backlog was $5.2 billion attributable to 11 customers.  All four of our 
drillships are currently contracted to work in the GOM.  As of February 8, 2016, contract backlog attributable to 
our expected operations in the GOM was $510.0 million, $653.0 million and $653.0 million for the years 2016, 
2017 and 2018, respectively, and $626.0 million in the aggregate for the years 2019 to 2020 attributable to three 
customers.    See  “Management’s  Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations  – 
Market Overview – Contract Drilling Backlog” in Item 7 of this report.  See “Risk Factors — We can provide no 
assurance that our drilling contracts will not be terminated early or that our current backlog of contract drilling 
revenue will be ultimately realized” in Item 1A of this report, which is incorporated herein by reference.   

Competition 

Despite  consolidation  in  previous  years,  the  offshore  contract  drilling  industry  remains  highly  competitive 
with numerous industry participants, none of which at the present time has a dominant market share.  The industry 
may also experience additional consolidation in the future, which could create other large competitors.  Some of 
our competitors may have greater financial or other resources than we do.  Based on industry data, as of the date 
of this report, there are approximately 840 mobile drilling rigs in service worldwide, including approximately 300 
floater rigs.  

The offshore contract drilling industry is influenced by a number of factors, including global economies and 
demand for oil and natural gas, current and anticipated prices of oil and natural gas, expenditures by oil and gas 
companies for exploration and development of oil and natural gas and the availability of drilling rigs.   

Drilling contracts are traditionally awarded on a competitive bid basis.  Price is typically the primary factor in 
determining  which  qualified  contractor  is  awarded  a  job.    Customers  may  also  consider  rig  availability  and 
location,  a  drilling  contractor’s  operational  and  safety  performance  record,  and  condition  and  suitability  of 
equipment.  We believe we compete favorably with respect to these factors.   

We compete on a worldwide basis, but competition may vary significantly by region at any particular time.  
See “—Markets.”  Competition for offshore rigs generally takes place on a global basis, as these rigs are highly 
mobile and may be moved, at a cost that may be substantial, from one region to another.  It is characteristic of the 

6 

 
 
 
 
      
 
 
 
 
 
offshore  contract  drilling  industry  to  move  rigs  from  areas  of  low  utilization  and  dayrates  to  areas  of  greater 
activity  and  relatively  higher  dayrates.    Significant  new  rig  construction  and  upgrades  of  existing  drilling  units 
could also intensify price competition.  See “Risk Factors – Our industry is highly competitive, with oversupply 
and intense price competition” in Item 1A of this report, which is incorporated herein by reference. 

Governmental Regulation 

Our operations are subject to numerous international, foreign, U.S., state and local laws and regulations that 
relate directly or indirectly to our operations, including regulations controlling the discharge of materials into the 
environment, requiring removal and clean-up under some circumstances, or otherwise relating to the protection of 
the environment, and may include laws or regulations pertaining to climate change, carbon emissions or energy 
use.  See “Risk Factors – Governmental laws and regulations, both domestic and international, may add to our 
costs or limit our drilling activity” and “Risk Factors –  Compliance with or breach of environmental laws can be 
costly and could limit our operations” in Item 1A of this report, which are incorporated herein by reference. 

Operations Outside the United States  

Our operations  outside  the  U.S.  accounted for  approximately  79%, 85%  and 89% of our  total  consolidated 
revenues for the years ended December 31, 2015, 2014 and 2013, respectively.  See “Risk Factors – Significant 
portions  of  our  operations  are  conducted  outside  the  United  States  and  involve  additional  risks  not  associated 
with United States domestic operations,” “Risk Factors – We may enter into drilling contracts that expose us to 
greater risks than we normally assume,” “Risk Factors – We may be required to accrue additional tax liability on 
certain  of  our  foreign  earnings”  and  “Risk  Factors  –  Fluctuations  in  exchange  rates  and  nonconvertibility  of 
currencies could result in losses to us” in Item 1A of this report, which are incorporated herein by reference. 

Employees  

As  of  December  31,  2015,  we  had  approximately  3,400  workers,  including  international  crew  personnel 

furnished through independent labor contractors.   

Executive Officers of the Registrant 

  We  have  included  information  on  our  executive  officers  in  Part  I  of  this  report  in  reliance  on  General 
Instruction G(3) to Form 10-K.  Our executive officers are elected annually by our Board of Directors to serve 
until the next annual meeting of our Board of Directors, or until their successors are duly elected and qualified, or 
until  their  earlier  death,  resignation,  disqualification  or  removal  from  office.    Information  with  respect  to  our 
executive officers is set forth below. 

Name 

Marc Edwards 
Lyndol L. Dew 
Gary T. Krenek  
David L. Roland  
Ronald Woll 
Beth G. Gordon  

Age as of  
January 31, 2016 
55 
61 
57 
54 
48 
60 

Position 

President and Chief Executive Officer and Director  
Senior Vice President – Worldwide Operations 
Senior Vice President and Chief Financial Officer 
Senior Vice President, General Counsel and Secretary 
Senior Vice President and Chief Commercial Officer 
Controller and Chief Accounting Officer 

Marc Edwards has served as our President and Chief Executive Officer and as a Director since March 2014.  
Mr.  Edwards  previously  served  as  a  member  of  the  Executive  Committee  and  as  Senior  Vice  President  of  the 
Completion  and  Production  Division  at  Halliburton  Company,  a  global  diversified  oilfield  services  company, 
from January 2010 to February 2014.  Mr. Edwards also served as Vice President for Production Enhancement of 
Halliburton Company from January 2008 through December 2009.   

Lyndol  L.  Dew  has  served  as  our  Senior  Vice  President  –  Worldwide  Operations  since  September  2006.  
Previously, Mr. Dew served as our Vice President  –  International Operations from January 2006 to August 2006 
and as our Vice President – North American Operations from January 2003 to December 2005. 

Gary T. Krenek has served as our Senior Vice President and our Chief Financial Officer since October 2006.  

From March 1998 to 2006, Mr. Krenek served as our Vice President and Chief Financial Officer.   

7 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
       
 
 
 
David  L.  Roland  has  served  as  our  Senior  Vice  President,  General  Counsel  and  Secretary  since  September 
2014.  From April 2004 until joining us in 2014, Mr. Roland served as Senior Vice President, General Counsel 
and Corporate Secretary of ION Geophysical Corporation, a NYSE-listed geophysical company.   

Ronald Woll has served as our Senior Vice President and Chief Commercial Officer since June 2014.  Mr. 
Woll  previously  served  as  Senior  Vice  President  Supply  Chain  at  Halliburton  Company,  a  global  diversified 
oilfield services company, from January 2011 through June 2014.  From January 2010 through December 2011, 
Mr. Woll served as Vice President, Procurement at Halliburton Company. 

Beth G. Gordon has served as our Controller and Chief Accounting Officer since April 2000.   

Access to Company Filings 

  We are subject to the informational requirements of the Securities Exchange Act of 1934, as amended, or the 
Exchange Act, and accordingly file annual, quarterly and current reports, any amendments to those reports, proxy 
statements and other information with the United States Securities and Exchange Commission, or SEC. You may 
read and copy the information we file with the SEC at the public reference facilities maintained by the SEC at 100 
F  Street,  N.E.,  Washington,  DC  20549.  Please  call  the  SEC  at  1-800-SEC-0330  for  further  information  on  the 
operation of the public reference room. Our SEC filings are also available to the public from the SEC’s Internet 
site at www.sec.gov or from our Internet site at www.diamondoffshore.com.  Our website provides a hyperlink to 
a third-party SEC filings website where these reports may be viewed and printed at no cost as soon as reasonably 
practicable  after  we  have  electronically  filed  such  material  with,  or  furnished  it  to,  the  SEC.    The  preceding 
Internet addresses and all other Internet addresses referenced in this report are for information purposes only and 
are not intended to be a hyperlink. Accordingly, no information found or provided at such Internet addresses or at 
our website in general (or at other websites linked to our website) is intended or deemed to be incorporated by 
reference in this report. 

Item 1A.  Risk Factors. 

Our  business  is  subject  to  a  variety  of  risks,  including  the  risks  described  below.    You  should  carefully 
consider these risks when evaluating us and our securities.  The risks and uncertainties described below are not the 
only  ones  facing  our  company.    We  are  also  subject  to  a  variety  of  risks  that  affect  many  other  companies 
generally, as well as additional risks and uncertainties not known to us or that, as of the date of this report, we 
believe  are  not  as  significant  as  the  risks  described  below.    If  any  of  the  following  risks  actually  occur,  our 
business, financial condition, results of operations and cash flows, and the trading prices of our securities, may be 
materially and adversely affected. 

The worldwide demand for drilling services has declined significantly as a result of the decline in oil prices, 
which commenced during the second half of 2014 and has continued into 2016. 

Demand for our drilling services depends in large part upon oil and natural gas industry offshore exploration 
and  production  activity  and  expenditure  levels,  which  are  directly  affected  by  oil  and  gas  prices  and  market 
expectations of potential changes in oil and gas prices.  Commencing in the second half of 2014, oil prices have 
declined precipitously and recently fell to a 12-year low of less than $30 per barrel.  The dramatic reduction in 
commodity prices has caused a sharp decline in the demand for offshore drilling services, including services that 
we provide and adversely affected our results of operations and cash flows in 2015.  A prolonged period of low oil 
prices would have a material adverse effect on many of our customers and, therefore, on our financial condition, 
results of operations and cash flows. 

Oil prices have been, and are expected to continue to be, volatile and are affected by numerous factors beyond 

our control, including: 

(cid:120)  worldwide supply and demand for oil and gas; 
(cid:120) 
(cid:120) 
(cid:120) 

the level of economic activity in energy-consuming markets; 
the worldwide economic environment or economic trends, such as recessions; 
the  ability  of  the  Organization  of  Petroleum  Exporting  Countries  (OPEC)  to  set  and  maintain 
production levels and pricing; 
the level of production in non-OPEC countries;  
civil unrest and the worldwide political and military environment, including uncertainty or instability 
resulting  from  an  escalation  or  additional  outbreak  of  armed  hostilities  involving  the  Middle  East, 

(cid:120) 
(cid:120) 

8 

 
 
 
 
 
 
 
 
  
 
 
 
Russia, other oil-producing regions or other geographic areas or further acts of terrorism in the United 
States or elsewhere;  
the cost of exploring for, developing, producing and delivering oil and gas; 
the discovery rate of new oil and gas reserves; 
the rate of decline of existing and new oil and gas reserves and production; 
available pipeline and other oil and gas transportation and refining capacity; 
the ability of oil and gas companies to raise capital; 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120)  weather conditions, including hurricanes, which can affect oil and gas operations over a wide area; 
(cid:120) 

natural disasters or incidents resulting from operating hazards inherent in offshore drilling, such as oil 
spills; 
the  policies  of  various  governments  regarding  exploration  and  development  of  their  oil  and  gas 
reserves; 
technological  advances  affecting  energy  consumption,  including  development  and  exploitation  of 
alternative fuels or energy sources; 
laws and regulations relating to environmental or energy security matters, including those purporting 
to address global climate change; 
domestic and foreign tax policy; and 
advances in exploration and development technology. 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 
(cid:120) 

  An increase in commodity demand and prices will not necessarily result in an immediate increase in offshore 
drilling activity since our customers’ project development times, reserve replacement  needs and expectations of 
future  commodity  demand,  prices  and  supply  of  available  competing  rigs  all  combine  to  affect  demand  for  our 
rigs.   

Our business depends on the level of activity in the offshore oil and gas industry, which has been cyclical and 
is significantly affected by many factors outside of our control. 

  Demand for our drilling services depends upon the level of offshore oil and gas exploration, development and 
production  in  markets  worldwide,  and  those  activities  depend  in  large  part  on  oil  and  gas  prices,  worldwide 
demand for oil and gas and a variety of political and economic factors.  The level of offshore drilling activity is 
also  adversely  affected  when  operators  reduce  or  defer  new  investment  in  offshore  projects,  reduce  or  suspend 
their drilling budgets or reallocate their drilling budgets away from offshore drilling in favor of other priorities, 
such as shale or other land-based projects, which could reduce demand for our rigs and newbuilds.  As a result, 
our business and the oil and gas industry in general are subject to cyclical fluctuations.   

As  a  result  of  the  cyclical  fluctuations  in  the  market,  there  have  been  periods  of  lower  demand,  excess  rig 
supply  and  lower  dayrates,  followed  by  periods  of  higher  demand,  shorter  rig  supply  and  higher  dayrates.    We 
cannot predict the timing or duration of such fluctuations.  Periods of lower demand or excess rig supply intensify 
the competition in the industry and often result in periods of lower utilization and lower dayrates.  During these 
periods, our rigs may not obtain contracts for future work and may be idle for long periods of time or may be able 
to  obtain  work  only  under  contracts  with  lower  dayrates  or  less  favorable  terms,  which  could  have  a  material 
adverse effect on our financial condition, results of operations and cash flows during these periods.  Additionally, 
prolonged  periods  of  low  utilization  and dayrates  could  also result  in  the  recognition of  impairment  charges on 
certain of our drilling rigs if future cash flow estimates, based upon information available to management at the 
time, indicate that the carrying value of these rigs may not be recoverable.  See “–We may incur additional asset 
impairments and/or rig retirements as a result of reduced demand for certain offshore drilling rigs.” 

Our industry is highly competitive, with oversupply and intense price competition. 

The  offshore  contract  drilling  industry  is  highly  competitive  with  numerous  industry  participants.  Some  of 
our competitors may be larger companies, have larger or more technologically advanced fleets and have greater 
financial or other resources than we do.  The drilling industry has experienced consolidation in the past and may 
experience  additional  consolidation,  which  could  create  additional  large  competitors.    Drilling  contracts  are 
traditionally  awarded  on  a  competitive  bid  basis.  Price  is  typically  the  primary  factor  in  determining  which 
qualified contractor is awarded a job; however, rig availability and location, a drilling contractor’s safety record 
and the quality and technical capability of service and equipment may also be considered. 

Recent new rig construction and upgrades of existing drilling rigs, cancelation or termination of contracts, as 
well  as  established  rigs  coming off contract  during  2015, have  contributed  to  the  current  oversupply of drilling 

9 

 
 
 
 
 
 
 
 
 
 
 
rigs,  intensifying  price  competition.  Additional  newbuild  rigs  entering  the  market  are  expected  to  further 
negatively  impact  rig  utilization  and  intensify  price  competition  as  rigs  are  delivered.  See  “Management’s 
Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations  –  Market  Overview  --  Floater 
Markets” in Item 7 of this report.   

  We  provide  offshore  drilling  services  to  a  customer  base  that  includes  major  and  independent  oil  and  gas 
companies and government-owned oil companies.  During 2015, one of our customers in Brazil, Petrobras, and 
our  five  largest  customers  in  the  aggregate  accounted  for  24%  and  65%,  respectively,  of  our  annual  total 
consolidated revenues.  The loss of a significant customer could have a material adverse impact on our financial 
condition, results of operations and cash flows, especially in a declining market where the number of our working 
drilling  rigs  is  declining  along  with  the  number  of  our  active  customers.  In  addition,  if  a  significant  customer 
experiences liquidity constraints or other financial difficulties, it could materially adversely affect our utilization 
rates  in  the  affected  market  and  also displace  demand  for  our other  drilling  rigs  and  newbuilds  as  the  resulting 
excess supply enters the market.  While it is normal for our customer base to change over time as work programs 
are completed, the loss of, or a significant reduction in the number of rigs contracted with, any major customer 
may  have  a  material  adverse  effect  on  our  financial  condition,  results  of  operations  and  cash  flows.    See 
“Management’s Discussion and Analysis of Financial Condition and Results of Operations – Market Overview – 
Contract Drilling Backlog” in Item 7 of this report.   

We  can  provide  no  assurance  that  our  drilling  contracts  will  not  be  terminated  early  or  that  our  current 
backlog of contract drilling revenue will be ultimately realized.  

Generally,  our  customers  may  terminate  our  drilling  contracts  under  certain  circumstances,  such  as  if  the 
drilling  rig  is  destroyed  or  lost,  if  we  suspend drilling  operations  for  a  specified period  of  time  as  a  result  of  a 
breakdown  of  major  equipment,  excessive  downtime  for  repairs,  failure  to  meet  minimum  performance  criteria 
(including customer acceptance testing) or, in some cases, due to other events beyond the control of either party.  
Our drilling contract for the Ocean BlackLion, for example, requires us to successfully complete certain testing 
procedures for the rig’s equipment, including the blowout preventers and well control systems.  We are currently 
undergoing the required testing.  If these tests are not successfully completed, our customer may have the right to 
terminate the drilling contract or may request a renegotiation of the terms of the contract.  

In addition, some of our drilling contracts permit the customer to terminate the contract after specified notice 
periods, often by tendering contractually specified termination amounts, which may not fully compensate us for 
the loss of the contract.  During depressed market conditions, certain customers have utilized such contract clauses 
to  seek  to  renegotiate  or  terminate  a  drilling  contract  or  claim  that  we  have  breached provisions  of our  drilling 
contracts  in  order  to  avoid  their  obligations  to  us  under  circumstances  where  we  believe  we  are  in  compliance 
with  the  contracts.    Additionally,  because  of  depressed  commodity  prices,  restricted  credit  markets,  economic 
downturns, changes in priorities or strategy or other factors beyond our control, a customer may no longer want or 
need a rig that is currently under contract or may be able to obtain a comparable rig at a lower dayrate.  For these 
reasons,  customers  may  seek  to  renegotiate  the  terms  of  our  existing  drilling  contracts,  terminate  our  contracts 
without  justification  or  repudiate  or  otherwise  fail  to  perform  their  obligations  under  our  contracts.    Such 
renegotiations  could  include  requests  to  lower  the  contract  dayrate,  lowering  of  a  dayrate  in  exchange  for 
additional contract term, shortening the term on one contracted rig in exchange for additional term on another rig, 
early  termination  of  a  contract  in  exchange  for  a  lump  sum  margin  payout  and  many  other  possibilities.    Our 
contract backlog may be adversely impacted as a result of such contract renegotiations.   

  When a customer terminates our contract prior to the contract’s scheduled expiration, our contract backlog is 
adversely  impacted,  and  we might  not recover  any  compensation  for  the  termination  or  any  recovery  we  might 
obtain may not fully compensate us for the loss of the contract.  In any case, the early termination of a contract 
may result in our rig being idle for an extended period of time. Each of these results could have a material adverse 
effect on our financial condition, results of operations and cash flows.  In addition, if our customer cancels our 
contract  or  if  we  elect  to  terminate  a  contract  due  to  the  customer’s  nonperformance  and  in  either  case  we  are 
unable to secure a new contract on a timely basis and on substantially similar terms, or if a contract is disputed or 
suspended for an extended period of time or if a contract is renegotiated, it could materially and adversely affect 
our financial condition, results of operations and cash flows. 

Currently, our contract backlog only includes future revenues under firm commitments; however, from time 
to  time,  we  may  report  anticipated  commitments  for  which  definitive  agreements  have  not  yet  been,  but  are 
expected to be, executed.  We can provide no assurance that in such cases we will be able to ultimately execute a 

10 

 
 
 
 
 
 
 
 
 
definitive  agreement.    In  addition,  for  the  reasons  described  above,  we  can  provide  no  assurance  that  our 
customers will be willing or able to fulfill their contractual commitments to us.   

Our  inability  to  perform  under  our  contractual  obligations  or  to  execute  definitive  agreements,  or  our 
customers’ inability or unwillingness to fulfill their contractual commitments to us, may have a material adverse 
effect on our financial condition, results of operations and cash flows.  See “– Our industry is highly competitive, 
with  oversupply  and  intense  price  competition”  and  “Management’s  Discussion  and  Analysis  of  Financial 
Condition and Results of Operations – Market Overview – Contract Drilling Backlog” in Item 7 of this report.   

We may not be able to renew or replace expiring contracts for our rigs. 

We have a number of customer contracts that will expire in 2016 and 2017.  Our ability to renew or replace 
expiring contracts or obtain new contracts, and the terms of any such contracts, will depend on various factors, 
including market conditions and the specific needs of our customers. Given the highly competitive and historically 
cyclical nature of our industry, we may not be able to renew or replace the contracts or we may be required to 
renew  or  replace  expiring  contracts  or  obtain  new  contracts  at  dayrates  that  are  below,  and  potentially 
substantially below, existing dayrates, or that have terms that are less favorable to us than our existing contracts or 
we may be unable to secure contracts for these rigs.  This could have a material adverse effect on our financial 
condition, results of operations and cash flows. 

We may incur additional asset impairments and/or rig retirements as a result of reduced demand for certain 
offshore drilling rigs. 

The  current  oversupply  of  drilling  rigs  in  the  offshore  drilling  market  has  resulted  in  numerous  rigs  being 
idled  and  in  some  cases  retired  and/or  scrapped.    We  evaluate  our  property  and  equipment  for  impairment 
whenever changes in circumstances indicate that the carrying amount of an asset may not be recoverable, and we 
could  incur  impairment  charges  related  to  the  carrying  value  of  our  drilling  rigs.    Impairment  write-offs  could 
result  if,  for  example,  any  of  our  rigs  become  obsolete  or  commercially  less  desirable  or  their  carrying  values 
become excessive due to the condition of the rig, cold stacking the rig, the expectation of cold stacking the rig in 
the near future, a decision to retire or scrap the rig, changes in technology, market demand or market expectations, 
or  excess  spending  over  budget  on  a  new-build  construction  project  or  major  rig  upgrade.    We  utilize  an 
undiscounted  probability-weighted  cash  flow  analysis  in  testing  an  asset  for  potential  impairment,  reflecting 
management’s  assumptions  and  estimates  regarding  the  appropriate  risk-adjusted  dayrate  by  rig,  future  industry 
conditions and operations and other factors.  Asset impairment evaluations are, by their nature, highly subjective.  
The use of different estimates and assumptions could result in materially different carrying values of our assets, 
which could impact the need to record an impairment charge and the amount of any charge taken.  Since 2012, we 
have retired and sold 12 drilling rigs and recorded impairment losses aggregating $1.0 billion, including $860.4 
million recognized in 2015.  See “Management’s Discussion and Analysis of Financial Condition and Results of 
Operations – Market Overview – Critical Accounting Estimates – Property, Plant and Equipment” in Item 7 of 
this report and Note 2 “Asset Impairments” to our Consolidated Financial Statements in Item 8 of this report. 

We  can  provide  no  assurance  that  our  assumptions  and  estimates  used  in  our  asset  impairment  evaluations 
will  ultimately  be  realized  or  that  the  current  carrying  value  of  our  property  and  equipment,  including  rigs 
designated as held for sale, will ultimately be realized. 

Our  contract  drilling  expense  includes  fixed  costs  that  will  not  decline  in  proportion  to  decreases  in  rig 
utilization and dayrates. 

Our contract drilling expense includes all direct and indirect costs associated with the operation, maintenance 
and support of our drilling equipment, which is often not affected by changes in dayrates and utilization.  During 
periods  of  reduced  revenue  and/or  activity,  certain  of  our  fixed  costs  will  not  decline  and  often  we  may  incur 
additional operating costs, such as fuel and catering costs, for which we are generally reimbursed by the customer 
when a rig is under contract.  During times of reduced utilization, reductions in costs may not be immediate as we 
may incur additional costs associated with cold stacking a rig (particularly if we cold stack a newer rig, such as a 
drillship, for which cold-stacking costs are typically substantially higher than for a jack-up rig or an older floater 
rig), or we may not be able to fully reduce the cost of our support operations in a particular geographic region due 
to the need to support the remaining drilling rigs in that region.  A decline in revenue due to lower dayrates and/or 
utilization may not be offset by a corresponding decrease in contract drilling expense and could have a material 
adverse effect on our financial condition, results of operations and cash flows.    

11 

 
 
 
 
 
 
       
 
 
 
 
 
Although  we  have  paid  cash  dividends  in  the  past,  we  may  not  pay  regular  or  special  cash  dividends  in  the 
future and we can give no assurance as to the amount or timing of the payment of any future regular or special 
cash dividends. 

  We pay dividends at the discretion of our Board of Directors, or Board.  In recent years, we have paid both 
regular quarterly and special cash dividends, although we did not pay special cash dividends in 2015.  In February 
2016,  we  announced  that  we  had  discontinued  our  regular  quarterly  cash  dividend.    Our  Board  has  adopted  a 
policy of considering regular and special cash dividends, in amounts to be determined, on a quarterly basis.  Any 
determination to declare a dividend, as well as the amount of any dividend that may be declared, will be based on 
the Board’s consideration of our financial position, earnings, earnings outlook, capital spending plans, outlook on 
current and future market conditions and business needs and other factors that our Board considers relevant at that 
time.    The  Board’s  dividend  policy  may  change  from  time  to  time,  but  there  can  be  no  assurance  that  we  will 
declare any cash dividends at all or in any particular amounts.  See “Market for the Registrant’s Common Equity, 
Related Stockholder Matters and Issuer Purchases of Equity Securities – Dividend Policy” in Item 5 of this report 
and “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and 
Capital Resources” in Item 7 of this report. 

We may enter into drilling contracts that expose us to greater risks than we normally assume. 

From time to time, we may enter into drilling contracts with national oil companies, government-controlled 
entities  or  others  that  expose  us  to  greater  risks  than  we  normally  assume,  such  as  exposure  to  greater 
environmental or other liability and more onerous termination provisions giving the customer a right to terminate 
without cause or upon little or no notice.  Upon termination, these contracts may not result in a payment to us, or 
if a termination payment is required, it may not fully compensate us for the loss of a contract.  In addition, the 
early termination of a contract may result in a rig being idle for an extended period of time, which could adversely 
affect our financial condition, results of operations and cash flows.  While we believe that the financial terms of 
these  contracts  and  our  operating  safeguards  in  place  may  partially  mitigate  these  risks,  we  can  provide  no 
assurance  that  the  increased  risk  exposure  will  not  have  a  material  negative  impact  on  our  future  operations  or 
financial results.  

Changes  in  tax  laws,  effective  income  tax  rates  or  adverse  outcomes  resulting  from  examination  of  our  tax 
returns could adversely affect our financial results. 

Tax  laws  and  regulations  are  highly  complex  and  subject  to  interpretation  and  disputes.    We  conduct  our 
worldwide operations through various subsidiaries in a number of countries throughout the world.  As a result, we 
are subject to highly complex tax laws, regulations and income tax treaties within and between the countries in 
which  we  operate  as  well  as  countries  in  which  we  may  be  resident,  which  may  change  and  are  subject  to 
interpretation.  We determine our income tax expense based on our interpretation of the applicable tax laws and 
regulations  in  effect  in  each  jurisdiction  for  the  period  during  which  we  operate  and  earn  income.  Our  overall 
effective tax rate could be adversely and suddenly affected by lower than anticipated earnings in countries where 
we  have  lower  statutory  rates  and  higher  than  anticipated earnings  in  countries  where we  have  higher  statutory 
rates, by changes in the valuation of our deferred tax assets and liabilities or by changes in tax law, tax treaties, 
regulations,  accounting  principles  or  interpretations  thereof  in  one  or  more  countries  in  which  we  operate.    In 
addition, changes in laws, treaties and regulations and the interpretation of such laws, treaties and regulations may 
put  us  at  risk  for  future  tax  assessments  and  liabilities  which  could  be  substantial  and  could  have  a  material 
adverse effect on our financial condition, results of operations and cash flows. 

Our income tax returns are subject to review and examination. We do not recognize the benefit of income tax 
positions  we  believe  are  more  likely  than  not  to  be  disallowed  upon  challenge  by  a  tax  authority.  If  any  tax 
authority successfully challenges any tax position taken or intercompany pricing policies, or if the terms of certain 
income tax treaties are interpreted in a manner that is adverse to us or our operations, or if we lose a material tax 
dispute  in  any  country,  our  effective  tax  rate  on  our  worldwide  earnings  could  increase  substantially  and  our 
earnings and cash flows from operations could be materially adversely affected. 

Governmental laws and regulations, both domestic and international, may add to our costs or limit our drilling 
activity. 

Our operations are affected from time to time in varying degrees by governmental laws and regulations. In 
addition  to  the  specific  regulatory  risks  discussed  elsewhere  in  this  Item  1A.  “Risk  Factors”  section,  our 
operations are subject to other laws, regulations and government policies worldwide. Certain countries are subject 

12 

 
 
 
 
 
 
 
 
 
to  restrictions,  sanctions  and  embargoes  imposed  by  the  United  States  government  or  other  governmental  or 
international authorities. These restrictions, sanctions and embargoes may prohibit or limit us from participating in 
certain business activities in those countries. Our operations are also subject to numerous local, state and federal 
laws and regulations in the United States and in foreign jurisdictions concerning the containment and disposal of 
hazardous  materials,  the  remediation  of  contaminated  properties  and  the  protection  of  the  environment.  The 
offshore  drilling  industry  is  dependent  on  demand  for  services  from  the  oil  and  gas  exploration  industry  and, 
accordingly, can be affected by changes in tax and other laws relating to the energy business generally. We may 
be required to make significant expenditures for additional capital equipment or inspections and recertifications 
thereof to comply with existing or new governmental laws and regulations. It is also possible that these laws and 
regulations may in the future add significantly to our operating costs or result in a reduction in revenues associated 
with downtime required to install such equipment or may otherwise significantly limit drilling activity. 

In  addition,  our  operating  income  is  negatively  impacted  when  we  perform  certain  regulatory  inspections, 
which we refer to as a 5-year survey, or special survey, that are due every five years for each of our rigs. These 
special  surveys  are  generally  performed  in  a  shipyard  and  require  scheduled  downtime,  which  can  negatively 
impact  operating  revenue.    Operating  expenses  increase  as  a  result  of  these  special  surveys  due  to  the  cost  to 
mobilize  the  rigs  to  a  shipyard,  inspection  costs  incurred  and  repair  and  maintenance  costs.  Repair  and 
maintenance  activities  may  result  from  the  special  survey  or  may  have  been  previously  planned  to  take  place 
during this mandatory downtime. The number of rigs undergoing a 5-year survey will vary from year to year, as 
well  as  from  quarter  to  quarter.    Operating  income  may  also  be  negatively  impacted  by  intermediate  surveys, 
which are performed at interim periods between 5-year surveys. Intermediate surveys are generally less extensive 
in duration and scope than a 5-year survey. Although an intermediate survey normally does not require shipyard 
time,  the  survey  may  require  some  downtime  for  the  rig.    We  can  provide  no  assurance  as  to  the  exact  timing 
and/or duration of downtime associated with regulatory inspections, planned rig mobilizations and other shipyard 
projects. 

In the aftermath of the 2010 Macondo well blowout and subsequent investigation into the causes of the event, 
new rules were implemented for oil and gas operations in the GOM and in many of the international locations in 
which  we operate,  including new  standards  for well  design,  casing  and cementing  and  well  control  procedures, 
equipment  inspection  and  certifications,  as well  as  rules  requiring  operators  to  systematically  identify  risks  and 
establish safeguards against those risks through a comprehensive safety and environmental management system, 
or  SEMS.    New  regulations  may  continue  to  be  announced,  including  rules  regarding  drilling  systems  and 
equipment, such as blowout preventer and well control systems and lifesaving systems, as well as rules regarding 
employee training, engaging personnel in safety management and requiring third party audits of SEMS programs.  
Such new regulations could require modifications or enhancements to existing systems and equipment, or require 
new equipment, and could increase our operating costs and cause downtime for our rigs if we are required to take 
any of them out of service between scheduled surveys or inspections, or if we are required to extend scheduled 
surveys or inspections, to meet any such new requirements.  We are not able to predict the likelihood, nature or 
extent of additional rulemaking, and we are not able to predict the future impact of these events on our operations.  
Additional  governmental  regulations  concerning 
training 
requirements or other matters could increase the costs of our operations, and enhanced permitting requirements, as 
well  as  escalating  costs  borne  by  our  customers,  could  reduce  exploration  activity  in  the  GOM  and  therefore 
demand for our services.   

taxation,  equipment  specifications, 

licensing, 

Governments  in  some  countries  are  increasingly  active  in  regulating  and  controlling  the  ownership  of 
concessions,  the  exploration  for  oil  and  gas  and  other  aspects  of  the  oil  and  gas  industry.    The  modification  of 
existing  laws or regulations or  the  adoption  of new  laws  or regulations  curtailing  exploratory  or  developmental 
drilling  for  oil  and  gas  for  economic,  environmental  or  other  reasons  could  materially  and  adversely  affect  our 
operations by limiting drilling opportunities.   

Governments around the world are also increasingly considering and adopting laws and regulations to address 
climate change issues.  Lawmakers and regulators in the United States and other jurisdictions where we operate 
have focused increasingly on restricting the emission of carbon dioxide, methane and other “greenhouse” gases.  
This  may  result  in  new  environmental  regulations  that  may  unfavorably  impact  us,  our  suppliers  and  our 
customers.    We  may  be  exposed  to  risks  related  to  new  laws,  regulations,  treaties  or  international  agreements 
pertaining to climate change, greenhouse gases, carbon emissions or energy use that could decrease the use of oil 
or natural gas, thus reducing demand for hydrocarbon-based fuel and our drilling services.  Governments may also 
pass laws or regulations incentivizing or mandating the use of alternative energy sources, such as wind power and 
solar energy, which may reduce demand for oil and natural gas and our drilling services.  Such laws, regulations, 
treaties or international agreements could result in increased compliance costs or additional operating restrictions, 

13 

 
 
 
 
 
 
 
 
which may have a negative impact on our business, and could adversely affect our operations by limiting drilling 
opportunities. 

Contracts for our drilling rigs are generally fixed dayrate contracts, and increases in our operating costs could 
adversely affect our profitability on those contracts. 

Our contracts for our drilling rigs generally provide for the payment of a fixed dayrate per rig operating day, 
although some contracts do provide for a limited escalation in dayrate due to increased operating costs we incur 
on the project.  Many of our operating costs, such as labor costs, are unpredictable and fluctuate based on events 
beyond our control.  In addition, equipment repair and maintenance expenses fluctuate depending on the type of 
activity  the  rig  is  performing,  the  age  and  condition  of  the  equipment  and  general  market  factors  impacting 
relevant parts, components and services.  The gross margin that we realize on these fixed dayrate contracts will 
fluctuate based on variations in our operating costs over the terms of the contracts.  In addition, for contracts with 
dayrate escalation clauses, we may not be able to fully recover increased or unforeseen costs from our customers.  
Our  inability  to  recover  these  increased or unforeseen  costs  from  our  customers  could materially  and  adversely 
affect our financial condition, results of operations and cash flows. 

Rig conversions, upgrades or new-builds may be subject to delays and cost overruns. 

From time to time, we add new capacity through conversions or upgrades to our existing rigs or through new 
construction,  such  as  our harsh  environment,  ultra-deepwater  semisubmersible  rig, Ocean GreatWhite,  which  is 
currently under construction.  Projects of this type are subject to risks of delay or cost overruns inherent in any 
large construction project resulting from numerous factors, including the following: 

shortages of equipment, materials or skilled labor;  

unscheduled delays in the delivery of ordered materials and equipment; 
unanticipated cost increases or change orders;  

(cid:120) 
(cid:120)  work stoppages; 
(cid:120) 
(cid:120) 
(cid:120)  weather interferences or storm damage;  
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(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

difficulties in obtaining necessary permits or in meeting permit conditions; 
design and engineering problems;  
disputes with shipyards or suppliers; 
availability of suppliers to recertify equipment for enhanced regulations; 
customer acceptance delays; 
shipyard failures or unavailability; and 
failure or delay of third party service providers, civil unrest and labor disputes.  

Failure to complete a rig upgrade or new construction on time, or failure to complete a rig conversion or new 
construction  in  accordance  with  its  design  specifications  may,  in  some  circumstances,  result  in  the  delay, 
renegotiation or cancellation of a drilling contract, resulting in a loss of contract drilling backlog and revenue to 
us.    If  a  drilling  contract  is  terminated  under  these  circumstances,  we  may  not  be  able  to  secure  a  replacement 
contract  or,  if  we  do  secure  a  replacement  contract,  it  may  not  contain  equally  favorable  terms.    In  addition, 
impairment write-offs could result if a rig’s carrying value becomes excessive due to spending over budget on a 
newbuild construction project or major rig upgrade.   

Our  business  involves  numerous  operating  hazards  that  could  expose  us  to  significant  losses  and  significant 
damage claims.  We are not fully insured against all of these risks and our contractual indemnity provisions may 
not fully protect us.  

Our  operations  are  subject  to  the  significant  hazards  inherent  in  drilling  for  oil  and  gas  offshore,  such  as 
blowouts, reservoir damage, loss of production, loss of well control, unstable or faulty sea floor conditions, fires and 
natural disasters such as hurricanes.  The occurrence of any of these types of events could result in the suspension of 
drilling operations, damage to or destruction of the equipment involved and injury or death to rig personnel, damage 
to producing or potentially productive oil and gas formations, and oil spillage, oil leaks, well blowouts and extensive 
uncontrolled  fires,  any  of  which  could  cause  significant  environmental  damage.    In  addition,  offshore  drilling 
operations are subject to marine hazards, including capsizing, grounding, collision and loss or damage from severe 
weather.  Operations also may be suspended because of machinery breakdowns, abnormal drilling conditions, failure 
of suppliers or subcontractors to perform or supply goods or services or personnel shortages.  Any of the foregoing 
events could result in significant damage or loss to our properties and assets or the properties and assets of others, 

14 

 
 
 
 
 
 
 
 
 
 
 
 
injury  or  death  to  rig  personnel  or  others,  significant  loss  of  revenues  and  significant  damage  claims  against  us, 
which could have a material adverse effect on our results of operations, financial condition and cash flows.   

Our  drilling  contracts  with  our  customers  provide  for  varying  levels  of  indemnity  and  allocation  of  liabilities 
between our customers and us with respect to the hazards and risks inherent in, and damages or losses arising out of, 
our operations, and we may not be fully protected.  Our contracts with our customers generally provide that we and 
our customers each assume liability for our respective personnel and property.  Our contracts also generally provide 
that  our  customers  assume  most  of  the  responsibility  for  and  indemnify  us  against  loss,  damage  or  other  liability 
resulting from, among other hazards and risks, pollution originating from the well and subsurface damage or loss, 
while we typically retain responsibility for and indemnify our customers against pollution originating from the rig.  
However,  in  certain  drilling  contracts  we  may  not  be  fully  indemnified  by  our  customers  for  damage  to  their 
property and/or the property of their other contractors.  In certain contracts we may assume liability for losses or 
damages  (including  punitive  damages)  resulting  from  pollution  or  contamination  caused  by  negligent  or  willful 
acts of commission or omission by us, our suppliers and/or subcontractors, generally subject to negotiated caps on a 
per  occurrence  basis  and/or  on  an  aggregate  basis  for  the  term  of  the  contract.    In  some  cases,  suppliers  or 
subcontractors who provide equipment or services to us may seek to limit their liability resulting from pollution or 
contamination.  Our contracts are individually negotiated, and the levels of indemnity and allocation of liabilities in 
them  can  vary  from  contract  to  contract  depending  on  market  conditions,  particular  customer  requirements  and 
other factors existing at the time a contract is negotiated.   

Additionally, the enforceability of indemnification provisions in our contracts may be limited or prohibited by 
applicable law or may not be enforced by courts having jurisdiction, and we could be held liable for substantial 
losses or damages and for fines and penalties imposed by regulatory authorities.  The indemnification provisions 
of  our  contracts  may  be  subject  to  differing  interpretations,  and  the  laws  or  courts  of  certain  jurisdictions  may 
enforce such provisions while other laws or courts may find them to be unenforceable, void or limited by public 
policy  considerations,  including  when  the  cause  of  the  underlying  loss  or  damage  is  our  gross  negligence  or 
willful misconduct, when punitive damages are attributable to us or when fines or penalties are imposed directly 
against us.  The law with respect to the enforceability of indemnities varies from jurisdiction to jurisdiction and is 
unsettled  under  certain  laws  that  are  applicable  to  our  contracts.    Current  or  future  litigation  in  particular 
jurisdictions, whether or not we are a party, may impact the interpretation and enforceability of indemnification 
provisions  in  our  contracts.    There  can  be  no  assurance  that  our  contracts  with  our  customers,  suppliers  and 
subcontractors will fully protect us against all hazards and risks inherent in our operations.  There can also be no 
assurance that those parties with contractual obligations to indemnify us will be financially able to do so or will 
otherwise honor their contractual obligations. 

We  maintain  liability  insurance,  which  includes  coverage  for  environmental  damage;  however,  because  of 
contractual provisions and policy limits, our insurance coverage may not adequately cover our losses and claim 
costs.  In addition, certain risks such as pollution, reservoir damage and environmental risks are generally not fully 
insurable.  Also, we do not typically purchase loss-of-hire insurance to cover lost revenues when a rig is unable to 
work.  Accordingly, it is possible that our losses from the hazards we face could have a material adverse effect on 
our results of operations, financial condition and cash flows. 

We believe that the policy limit under our marine liability insurance is within the range that is customary for 
companies of our size in the offshore drilling industry and is appropriate for our business.  However, if an accident or 
other event occurs that exceeds our coverage limits or is not an insurable event under our insurance policies, or is not 
fully covered by contractual indemnity, it could have a material adverse effect on our results of operations, financial 
condition  and  cash  flows.    There  can  be  no  assurance  that  we  will  continue  to  carry  the  insurance  we  currently 
maintain, that our insurance will cover all types of losses or that we will be able to maintain adequate insurance in the 
future at rates we consider to be reasonable or that we will be able to obtain insurance against some risks. 

Accordingly, the occurrence of any of the hazards we face could have a material adverse effect on our results 

of operations, financial condition and cash flows. 

Significant portions of our operations are conducted outside the United States and involve additional risks not 
associated with United States domestic operations. 

Our  operations  outside  the  United  States  accounted  for  approximately  79%,  85%  and  89%  of  our  total 
consolidated revenues for 2015, 2014 and 2013, respectively, and include operations in South America, Australia 
and Southeast Asia, Europe, East and West Africa, the Mediterranean and Mexico.  Because we operate in various 
regions  throughout  the  world,  we  are  exposed  to  risks  of  war,  political  disruption,  civil  disturbance,  acts  of 

15 

 
 
 
 
 
 
 
 
 
 
terrorism,  political  corruption,  possible  economic  and  legal  sanctions  (such  as  possible  restrictions  against 
countries  that the  U.S. government  may  consider  to be  state  sponsors of  terrorism)  and  changes  in global  trade 
policies. We may not have insurance coverage for these risks, or we may not be able to obtain adequate insurance 
coverage  for  such  events  at reasonable rates.    Our operations  may  become  restricted, disrupted or prohibited  in 
any country in which any of the foregoing risks occur. In particular, the occurrence of any of these risks or any of 
the following events could materially and adversely impact our results of operations: 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 

political and economic instability; 
piracy, terrorism or other assaults on property or personnel; 
kidnapping of personnel; 
seizure, expropriation, nationalization, deprivation, malicious damage or other loss of possession or 
use of property or equipment; 
renegotiation or nullification of existing contracts; 
disputes and legal proceedings in international jurisdictions; 
changing social, political and economic conditions; 
enactment of additional or stricter U.S. government or international sanctions; 
imposition of wage and price controls, trade barriers or import-export quotas; 
restrictive foreign and domestic monetary policies; 
the inability to repatriate income or capital; 
difficulties in collecting accounts receivable and longer collection periods; 
fluctuations in currency exchange rates and restrictions on currency exchange; 
regulatory or financial requirements to comply with foreign bureaucratic actions; 
restriction or disruption of business activities; 
limitation of our access to markets for periods of time; 
travel limitations or operational problems caused by public health threats; 
difficulties  in  supplying,  repairing  or  replacing  equipment  or  transporting  personnel  in  remote 
locations; 
difficulties in obtaining visas or work permits for our employees on a timely basis; and  
changing taxation policies and confiscatory or discriminatory taxation.  

  We are also subject to the U.S. Treasury Department’s Office of Foreign Assets Control and other U.S. laws 
and  regulations  governing  our  international  operations  in  addition  to  worldwide  anti-bribery  laws.    In  addition, 
international  contract  drilling  operations  are  subject  to  various  laws  and  regulations  in  countries  in  which  we 
operate, including laws and regulations relating to: 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

the equipping and operation of drilling rigs;  
import-export quotas or other trade barriers; 
repatriation of foreign earnings or capital;  
oil and gas exploration and development;  
local content requirements; 
taxation of offshore earnings and earnings of expatriate personnel; and 
use and compensation of local employees and suppliers by foreign contractors. 

Some foreign governments favor or effectively require the awarding of drilling contracts to local contractors, 
require  use  of  a  local  agent  or  require  foreign  contractors  to  employ  citizens  of,  or  purchase  supplies  from,  a 
particular jurisdiction.  These practices may adversely affect our ability to compete in those regions.  It is difficult 
to predict what governmental regulations may be enacted in the future that could adversely affect the international 
offshore drilling industry.  The actions of foreign governments may materially and adversely affect our ability to 
compete. 

In  addition,  the  shipment  of  goods,  including  the  movement  of  a  drilling  rig  across  international  borders, 
subjects us to extensive trade laws and regulations.  Our import activities are governed by unique customs laws 
and  regulations  that  differ  in  each  of  the  countries  in  which  we  operate  and  often  impose  record  keeping  and 
reporting  obligations.    The  laws  and  regulations  concerning  import/export  activity  and  record  keeping  and 
reporting requirements are complex and change frequently.  These laws and regulations may be enacted, amended, 
enforced and/or interpreted in a manner that could materially and adversely impact our operations.  Shipments can 
be  delayed  and  denied  export  or  entry  for  a  variety  of  reasons,  some  of  which  may  be  outside  of  our  control.  
Shipping delays or denials could cause unscheduled downtime for our rigs.  Failure to comply with these laws and 

16 

 
 
 
 
 
 
 
 
regulations  could  result  in  criminal  and  civil  penalties,  economic  sanctions,  seizure  of  shipments  and/or  the 
contractual withholding of monies owed to us, among other things. 

Compliance with or breach of environmental laws can be costly and could limit our operations. 

In  the  United  States  and  in  many  of  the  international  locations  in  which  we  operate,  laws  and  regulations 
controlling the discharge of materials into the environment, requiring removal and cleanup of materials that may 
harm the environment or otherwise relating to the protection of the environment apply to some of our operations. 
For  example,  we,  as  an  operator  of  mobile  offshore  drilling  units  in  navigable  United  States  waters  and  some 
offshore  areas,  may  be  liable  for  damages  and  costs  incurred  in  connection  with  oil  spills  related  to  those 
operations.  Laws  and  regulations  protecting  the  environment  have  become  increasingly  stringent,  and  may  in 
some  cases  impose  “strict  liability,”  rendering  a  person  liable  for  environmental  damage  without  regard  to 
negligence  or  fault  on  the  part  of  that  person.  These  laws  and  regulations  may  expose  us  to  liability  for  the 
conduct of, or conditions caused by, others or for acts that were in compliance with all applicable laws at the time 
they were performed.  

U.S. federal and state, foreign and international laws and regulations address oil spill prevention and control 
and impose a variety of obligations on us related to the prevention of oil spills and liability for damages resulting 
from  such  spills.    Some  of  these  laws  and  regulations  have  significantly  expanded  liability  exposure  across  all 
segments of the oil and gas industry.  For example, the United States Oil Pollution Act of 1990 imposes strict and, 
with limited exceptions, joint and several liability upon each responsible party for oil removal costs and a variety 
of  public  and  private  damages.    Failure  to  comply  with  such  laws  and  regulations  could  subject  us  to  civil  or 
criminal  enforcement  action,  for  which  we  may  not  receive  contractual  indemnification  or  have  insurance 
coverage,  and  could  result  in  the  issuance  of  injunctions  restricting  some  or  all  of  our  activities  in  the  affected 
areas.    In  addition,  legislative  and  regulatory  developments  may  occur  that  could  substantially  increase  our 
exposure to liabilities that might arise in connection with our operations. 

  The  application  of  these  laws  and  regulations  or  the  adoption  of  new  laws  and  regulations  could  have  a 
material adverse effect on our financial condition, results of operations and cash flows. 

We may be subject to litigation and disputes that could have a material adverse effect on us. 

  We  are,  from  time  to  time,  involved  in  litigation  and  disputes.  These  matters  may  include,  among  other 
things,  contract  disputes,  personal  injury  claims,  environmental  claims  or  proceedings,  asbestos  and  other  toxic 
tort  claims,  employment  and  tax  matters  and  other  litigation  that  arises  in  the  ordinary  course  of  our  business. 
Although we intend to defend these matters vigorously, we cannot predict with certainty the outcome or effect of 
any  dispute,  claim  or  other  litigation  matter,  and  there  can  be  no  assurance  as  to  the  ultimate  outcome  of  any 
litigation. We may not have insurance for litigation or claims that may arise, or if we do have insurance coverage 
it may not be sufficient, insurers may not remain solvent, other claims may exhaust some or all of the insurance 
available to us or insurers may interpret our insurance policies such that they do not cover losses for which we 
make claims or may otherwise dispute claims made.  Litigation may have a material adverse effect on us because 
of potential adverse outcomes, defense costs, the diversion of our management’s resources and other factors.  

We  self-insure  for  physical  damage  to  rigs  and  equipment  caused  by  named  windstorms  in  the  U.S.  Gulf  of 
Mexico. 

Because  the  amount  of  insurance  coverage  available  to  us  is  limited,  and  the  cost  for  such  coverage  is 
substantial,  we  self-insure  for  physical  damage  to  rigs  and  equipment  caused  by  named  windstorms  in  the 
GOM.   This  results  in  a  higher  risk  of  losses,  which  could  be  material,  that  are  not  covered  by  third  party 
insurance  contracts.    If  one  or  more  named  windstorms  in  the  GOM  cause  significant  damage  to  our  rigs  or 
equipment, it could have a material adverse effect on our financial condition, results of operations and cash flows.  

In  addition,  certain  of  our  shore-based  facilities  are  located  in  geographic  regions  that  are  susceptible  to 
damage or disruption from hurricanes and other weather events.  Future hurricanes or similar natural disasters that 
impact our facilities, our personnel located at those facilities or our ongoing operations may negatively affect our 
financial position and operating results for those periods. These negative effects may include reduced or lost sales 
and revenues; costs associated with interruption in operations and with resuming operations; reduced demand for 
our  services  from  customers  that  were  similarly  affected  by  these  events;  lost  market  share;  late  deliveries; 
uninsured property losses; inadequate business interruption insurance; employee evacuations; and an inability to 
retain necessary staff. 

17 

 
 
 
 
 
 
 
 
 
 
 
 
We may be required to accrue additional tax liability on certain of our foreign earnings. 

Certain  of  our  international  rigs  are  owned  and  operated,  directly  or  indirectly,  by  Diamond  Foreign  Asset 
Company, or DFAC, a Cayman Islands subsidiary that we own.  It is our intention to indefinitely reinvest future 
earnings of DFAC and its foreign subsidiaries to finance foreign activities.  We do not expect to provide for U.S. 
taxes  on  any  future  earnings  generated  by  DFAC  and  its  foreign  subsidiaries,  except  to  the  extent  that  these 
earnings  are  immediately  subjected  to  U.S.  federal  income  tax.    Should  a future distribution be  made  from  any 
unremitted earnings of this subsidiary, we may be required to record additional U.S. income taxes that, if material, 
could have a material adverse effect on our financial condition, results of operations and cash flows. 

Fluctuations in exchange rates and nonconvertibility of currencies could result in losses to us. 

Due  to  our  international  operations,  we  have  experienced  currency  exchange  losses  where  revenues  are 
received and expenses are paid in nonconvertible currencies or where we do not effectively hedge an exposure to 
a foreign currency.  We may also incur losses as a result of an inability to collect revenues because of a shortage 
of convertible currency available to the country of operation, controls over currency exchange or controls over the 
repatriation of income or capital.   

Acts  of  terrorism  and  other  political  and  military  events  could  adversely  affect  the  markets  for  our  drilling 
services. 

Terrorist attacks and the continued threat of terrorism in the U.S. and abroad, the continuation or escalation of 
existing armed hostilities or the outbreak of additional hostilities could lead to increased political, economic and 
financial  market instability and a downturn in the economies of the U.S. and other countries.  A lower level of 
economic activity could result in a decline in energy consumption or an increase in the volatility of energy prices, 
either of which could materially and adversely affect the market for our offshore drilling services, our dayrates or 
utilization and, accordingly, our financial condition, results of operations and cash flows. While we take steps that 
we believe are appropriately designed to secure our energy assets, there is no assurance that we can completely 
secure  these  assets,  completely  protect  them  against  a  terrorist  attack  or  other  political  and  military  events  or 
obtain adequate insurance coverage for such events at reasonable rates.   

Failure to obtain and retain highly skilled personnel could hurt our operations. 

  We require highly skilled personnel to operate and provide technical services and support for our business. A 
well-trained, motivated and adequately-staffed work force has a positive impact on our ability to attract and retain 
business.  As a result, our future success depends on our continuing ability to identify, hire, develop, motivate and 
retain skilled personnel for all areas of our organization. To the extent that demand for drilling services and/or the 
size of the worldwide industry fleet increases (including due to the impact of newly constructed rigs), shortages of 
qualified  personnel  could  arise,  creating  upward  pressure  on  wages  and  difficulty  in  staffing  and  servicing  our 
rigs, which could adversely affect our results of operations.  As of the date of this report, the Ocean GreatWhite, 
our ultra-deepwater, semisubmersible rig, is under construction.  This rig is not yet fully crewed and will require 
additional skilled personnel to operate.  Additional new capacity in the offshore drilling market could also cause 
further competition for qualified and experienced personnel as these entities seek to hire personnel with expertise 
in  the  offshore  drilling  industry.    Our  continued  ability  to  compete  effectively  depends  on  our  ability  to  attract 
new employees and to retain and motivate our existing employees. Heightened competition for skilled personnel 
could materially and adversely impact our financial condition, results of operations and cash flows by limiting our 
operations and further increasing our costs. 

We  rely  on  third-party  suppliers,  manufacturers  and  service  providers  to  secure  equipment,  components  and 
parts used in rig operations, conversions, upgrades and construction. 

Our reliance on third-party suppliers, manufacturers and service providers to provide equipment and services 
exposes  us  to  volatility  in  the  quality,  price  and  availability  of  such  items.    Certain  components,  parts  and 
equipment that we use in our operations may be available only from a small number of suppliers, manufacturers 
or  service  providers.    The  failure  of  one  or  more  third-party  suppliers,  manufacturers  or  service  providers  to 
provide  equipment,  components,  parts  or  services,  whether  due  to  capacity  constraints,  production  or  delivery 
disruptions, price increases, quality control issues, recalls or other decreased availability of parts and equipment, 
is  beyond  our  control  and  could  materially  disrupt  our  operations  or  result  in  the  delay,  renegotiation  or 
cancellation of drilling contracts, thereby causing a loss of contract drilling backlog and/or revenue to us, as well 
as an increase in operating costs. 

18 

 
 
 
 
 
 
 
 
 
 
 
 
Additionally,  our  suppliers,  manufacturers  and  service  providers  could  be  negatively  impacted  by  current 
industry conditions or global economic conditions. If certain of our suppliers, manufacturers or service providers 
were  to  experience  significant  cash  flow  issues,  become  insolvent  or  otherwise  curtail  or  discontinue  their 
business  as  a  result  of  such  conditions,  it  could  result  in  a  reduction  or  interruption  in  supplies  or  equipment 
available to us and/or a significant increase in the price of such supplies and equipment, which could adversely 
impact our results of operations and cash flows. 

Our debt levels may limit our liquidity and flexibility in obtaining additional financing and in pursuing other 
business opportunities.   

As of December 31, 2015, we had approximately $0.3 million and $2.0 billion in short-term borrowings and 
senior debt, respectively,  maturing at various times from 2019 through 2043.  As of February 16, 2016, we had 
$305.0 million in Eurodollar loans outstanding and an additional $1.2 billion of availability under our revolving 
credit facility.  We may incur additional indebtedness in the future, including indebtedness under our commercial 
paper program, and we may borrow from time to time under our revolving credit facility to fund working capital 
or other needs, subject to compliance with its covenants. 

Our ability to meet our debt service obligations is dependent upon our future performance, which is subject to 
general  economic  conditions,  industry  cycles  and  financial,  business  and  other  factors  affecting  our  operations, 
many  of  which  are  beyond  our  control.    High  levels  of  indebtedness  could  have  negative  consequences  to  us, 
including: 

(cid:120)  we may have difficulty satisfying our obligations with respect to our outstanding debt; 
(cid:120)  we  may  have  difficulty  obtaining  financing  in  the  future  for  working  capital,  capital  expenditures, 

acquisitions or other purposes;  

(cid:120) 
(cid:120) 

(cid:120)  we may need to use a substantial portion of our available cash flow from operations to pay interest 
and principal on our debt, which would reduce the amount of money available to fund working capital 
requirements, capital expenditures, the payment of dividends and other general corporate or business 
activities; 
our vulnerability to general economic downturns and adverse industry conditions could increase;  
our flexibility in planning for, or reacting to, changes in our business and in our industry in general 
could be limited;  
our amount of debt and the amount we must pay to service our debt obligations could place us at a 
competitive disadvantage compared to our competitors that have less debt;  
our customers may react adversely to our significant debt level and seek alternative service providers; 
and 
our failure to comply with the restrictive covenants in our debt instruments that, among other things, 
require  us  to  maintain  a  specified  ratio  of  our  consolidated  indebtedness  to  total  capitalization  and 
limit the ability of our subsidiaries to incur debt, could result in an event of default that, if not cured 
or waived, could have a material adverse effect on our business or prospects. 

(cid:120) 

(cid:120) 

(cid:120) 

In addition, approximately $500.0 million of our long-term debt will mature over the next five years and will 
need to be paid or refinanced. We may not be able to refinance our maturing debt upon commercially reasonable 
terms, or at all, depending on numerous factors, including our financial condition and prospects at the time and the 
then current state of the bank and capital markets in the U.S. Further, our liquidity may be adversely affected if we 
are unable to replace our revolving credit facility upon acceptable terms when it matures. 

Our  overall  debt  level  and/or  market  conditions  could  lead  credit  rating  agencies  to  lower  our  long-term 
and/or short-term corporate credit ratings.  In January 2016, Moody’s Investor Services announced that it would 
be reviewing our long-term corporate credit and unsecured debt rating and short-term credit rating for commercial 
paper, which are currently Baa2 and Prime-2, respectively, for possible downgrade.  Our current corporate credit 
rating is BBB+ and our short-term credit rating is A2 for Standard & Poor's Ratings Services. 

Downgrades in our corporate credit ratings could impact our ability to issue additional debt by raising the cost 
of issuing new debt.  As a consequence, we may not be able to issue additional debt in amounts and/or with terms 
that  we  consider  to  be  reasonable.    One  or  more  of  these  occurrences  could  limit  our  ability  to  pursue  other 
business opportunities. 

19 

 
 
 
 
 
 
 
 
 
 
 
In  addition,  our  credit  ratings  are  important  to  our  ability  to  issue  commercial  paper  at  favorable  rates  of 
interest.  A  downgrade  in  our  credit  rating  could  increase  the  cost  of  borrowing  or  make  the  commercial  paper 
market  unavailable  to  us,  which  could  increase  our  cost  of  capital.  In  addition,  our  access  to  funds  under  our 
commercial paper program is dependent on investor demand for our commercial paper. Disruptions and volatility 
in the global credit markets could limit the demand for our commercial paper or result in the need to offer higher 
interest rates to investors, which would result in increased expense and could adversely impact our liquidity. 

Our  revolving  credit  facility  bears  interest  at  variable  rates.  If  market  interest  rates  increase,  debt  service 
requirements on amounts outstanding under our revolving credit facility will increase. This would have an adverse 
effect on our results of operations and cash flows. Although we may employ hedging strategies such that a portion 
of the aggregate principal amount outstanding under this credit facility carries a fixed rate of interest, any hedging 
arrangement put in place may not offer complete protection from this risk. 

Any  significant  cyber  attack  or  other  interruption  in  network  security  or  the  operation  of  critical  computer 
systems could materially disrupt our operations and adversely affect our business.  

Our  business  has  become  increasingly  dependent  upon  information  technologies,  systems  and  networks  to 
conduct day-to-day operations, and we are placing greater reliance on technology to help support our operations 
and  increase  efficiency  in  our  business  functions.    We  are  dependent  upon  our  information  technology  and 
infrastructure,  including  operational  and  financial  computer  systems  to  process  the  data  necessary  to  conduct 
almost all aspects of our business.  Computer and other business facilities and systems could become unavailable 
or impaired from a variety of causes including, among others, storms and other natural disasters, terrorist attacks, 
utility  outages,  theft,  design  defects,  human  error  or  complications  encountered  as  existing  systems  are 
maintained,  repaired,  replaced  or  upgraded.    It  has  also  been  reported  that  unknown  entities  or  groups  have 
mounted  so-called  “cyber  attacks”  on  businesses  and  other  organizations  solely  to  disable  or  disrupt  computer 
systems,  disrupt  operations  and,  in  some  cases,  steal  data.    A  breach  or  failure  of  our  computer  systems  or 
networks, or those of our customers, vendors or others with whom we do business, could materially disrupt our 
business operations and could result in the alteration, loss, theft or corruption of data or unauthorized release of 
confidential, proprietary or sensitive data concerning our company, business activities, employees, customers or 
vendors. Any such breach or failure could have a material adverse effect on our operations, business or reputation. 

Unionization  efforts  and  labor  regulations  in  some  of  the  countries  in  which  we  operate  could  materially 
increase our costs or limit our flexibility. 

Some  of  our  employees  in  non-U.S.  markets  are  represented  by  labor  unions  and  work  under  collective 
bargaining or similar agreements which are subject to periodic renegotiation.  These negotiations could result in 
higher  personnel  expenses,  other  increased  costs  or  increased  operational  restrictions.    Efforts  have  been  made 
from time to time to unionize other portions of our workforce.  In addition, we may be subjected to strikes or work 
stoppages  and  other  labor  disruptions  in  certain  countries.    Additional  unionization  efforts,  new  collective 
bargaining  agreements  or  work  stoppages  could  materially  increase  our  costs,  reduce  our  revenues  or  limit  our 
flexibility.   

We are controlled by a single stockholder, which could result in potential conflicts of interest. 

Loews  Corporation,  which  we  refer  to  as  Loews,  beneficially  owned  approximately  53%  of  our  outstanding 
shares of common stock as of February 16, 2016, and is in a position to control actions that require the consent of 
stockholders,  including  the  election  of  directors,  amendment  of  our  Restated  Certificate  of  Incorporation  and  any 
merger or sale of substantially all of our assets.  In addition, three officers of Loews serve on our Board of Directors.  
One of those, James S. Tisch, the Chairman of the Board of our company, is also the Chief Executive Officer and a 
director of Loews.  We have also entered into a services agreement and a registration rights agreement with Loews, 
and we may in the future enter into other agreements with Loews.  

Loews is a holding company.  In addition to us, its principal subsidiaries are CNA Financial Corporation, a 90% 
owned subsidiary engaged in commercial property and casualty insurance; Boardwalk Pipeline Partners, LP, a 51% 
owned  subsidiary  engaged  in  transportation  and  storage  of  natural  gas  and  natural  gas  liquids  and  gathering  and 
processing  of  natural  gas;  and  Loews  Hotels  Holding  Corporation,  a  wholly-owned  subsidiary  engaged  in  the 
operation  of  a  chain  of  hotels.    It  is  possible  that  Loews  may  in  some  circumstances  be  in  direct  or  indirect 
competition with us, including competition with respect to certain business strategies and transactions that we may 
propose to undertake.  In addition, potential conflicts of interest exist or could arise in the future for our directors 
who are also officers of Loews with respect to a number of areas relating to the past and ongoing relationships of 

20 

 
 
 
 
 
 
 
 
 
 
 
 
Loews and us, including tax and insurance matters, financial commitments and sales of common stock pursuant to 
registration rights or otherwise.  Although the affected directors may abstain from voting on matters in which our 
interests and those of Loews are in conflict so as to avoid potential violations of their fiduciary duties to stockholders, 
the presence of potential or actual conflicts could affect the process or outcome of Board deliberations.  We cannot 
assure you that these conflicts of interest will not materially adversely affect us. 

Item 1B.  Unresolved Staff Comments. 

Not applicable. 

Item 2.  Properties. 

  We  own  an  office  building  in  Houston,  Texas,  where  our  corporate  headquarters  are  located.  We  also  own 
offices and other facilities in New Iberia, Louisiana, Aberdeen, Scotland, Macae, Brazil and Ciudad del Carmen, 
Mexico.    Additionally,  we  currently  lease  various  office,  warehouse  and  storage  facilities  in  Australia,  Egypt, 
Indonesia,  Louisiana,  Malaysia,  Romania,  Singapore,  Thailand,  Trinidad  and  Tobago,  the  U.K.  and  Vietnam  to 
support our offshore drilling operations. 

Item 3.  Legal Proceedings. 

See  information  with  respect  to  legal  proceedings  in  Note  12  “Commitments  and  Contingencies”  to  our 

Consolidated Financial Statements in Item 8 of this report. 

Item 4.  Mine Safety Disclosures. 

Not applicable. 

PART II 

Item  5.    Market  for  the  Registrant’s  Common  Equity,  Related  Stockholder  Matters  and  Issuer 

Purchases of Equity Securities. 

Price Range of Common Stock 

Our  common  stock  is  listed  on  the  New  York  Stock  Exchange,  or  NYSE,  under  the  symbol  “DO.”    The 
following  table  sets  forth,  for  the  calendar  quarters  indicated,  the  high  and  low  closing  prices  of  our  common 
stock as reported by the NYSE.   

Common Stock 

High 

Low 

2015 
First Quarter ............................................  
Second Quarter ........................................  
Third Quarter ...........................................  
Fourth Quarter .........................................  

2014 
First Quarter ............................................  
Second Quarter ........................................  
Third Quarter ...........................................  
Fourth Quarter .........................................  

 $      37.23 
         34.81 
         25.45 
         23.50 

 $      56.71 
         54.61 
         50.13 
         39.60 

 $    26.49 
       25.81 
       17.30 
       16.81 

 $    43.91 
       45.88 
       34.27 
       29.37 

As of February 16, 2016, there were approximately158 holders of record of our common stock.  This number 

represents registered stockholders and does not include stockholders who hold their shares institutionally.    

21 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividend Policy 

In  2015,  we  paid  regular  cash  dividends  of  $0.125  per  share  of  our  common  stock  on  March  2,  June  1, 
September 1 and December 1.  In 2014, we paid regular cash dividends of $0.125 and special cash dividends of 
$0.75 per share of our common stock on March 3, June 2, September 2 and December 1.   

On February 8, 2016, we announced that we were discontinuing our regular cash dividend. 

Our Board has adopted a policy of considering paying regular and special cash dividends, in amounts to be 
determined,  on  a  quarterly  basis.    Any  determination  to  declare  a  regular  or  special  dividend,  as  well  as  the 
amount of any dividend that may be declared, will be based on the Board’s consideration of our financial position, 
earnings, earnings outlook, capital spending plans, outlook on current and future market conditions and business 
needs and other factors that our Board considers relevant at that time.  Our dividend policy may change from time 
to time, and there can be no assurance that we will continue to declare any regular or special cash dividends at all 
or in any particular amounts.  See “Risk Factors – Although we have paid cash dividends in the past, we may not 
pay regular or special cash dividends in the future and we can give no assurance as to the amount or timing of the 
payment of any future regular or special cash dividends” in Item 1A of this report, which is incorporated herein 
by reference. 

CUMULATIVE TOTAL STOCKHOLDER RETURN  

The  following  graph  shows  the  cumulative  total  stockholder  return  for  our  common  stock,  the  Standard  & 
Poor's  500  Index  and  the  Dow  Jones  U.S.  Oil  Equipment  &  Services  index  over  the  five  year  period  ended 
December 31, 2015.  

Comparison of 2011 – 2015 Cumulative Total Return (1) 

$300

$250

$200

$150

$100

$50

$0

2010

2011

2012

2013

2014

2015

Diamond Offshore

S&P 500

Dow Jones U.S. Oil Equipment & Services

Dec. 31, 
2010 
100 
Diamond Offshore 
100 
S&P 500 
Dow Jones U.S. Oil Equipment & Services              100 
____________ 

Dec. 31, 
2011 
    87 
  102 
  87 

Dec. 31, 
2012 
  112 
118 
86 

Dec. 31, 
2013 
  99 
157 
109 

Dec. 31, 
2014 
    70 
  178 
  89 

Dec. 31, 
2015 
     41 
   181 
   67 

(1)  Total return assuming reinvestment of dividends.  Assumes $100 invested on December 31, 2010 in our 

common stock and the two published indices.  

22 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Our dividend history for the periods reported above is as follows: 

Q1 

Q2 

Q3 

Q4 

Year  Regular  Special  Regular  Special  Regular  Special  Regular  Special 

2015 
2014 
2013 
2012 
2011 

$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 

 $       -- 
$   0.75 
$   0.75 
$   0.75 
$   0.75 

$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 

$       -- 
$   0.75 
$   0.75 
$   0.75 
$   0.75 

$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 

$       -- 
$   0.75 
$   0.75 
$   0.75 
$   0.75 

$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 
$ 0.125 

$      -- 
$   0.75 
$   0.75 
$   0.75 
$   0.75 

Item 6.  Selected Financial Data. 

The following table sets forth certain historical consolidated financial data relating to Diamond Offshore. We 
prepared  the  selected  consolidated  financial  data  from  our  consolidated  financial  statements  as  of  and  for  the 
periods  presented.    The  selected  consolidated  financial  data  below  should  be  read  in  conjunction  with 
"Management's  Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations"  in  Item  7  and  our 
Consolidated Financial Statements (including the Notes thereto) in Item 8 of this report.   

2015 

As of and for the Year Ended December 31, 
2012 

2014 

2013 

2011 

Income Statement Data: 
Total revenues .......................................   $  2,419,393 
Operating (loss) income  .......................  
Net (loss) income ..................................  
Net (loss) income per share: 
  Basic ...................................................  
  Diluted ................................................  

(2.00) 
(2.00) 

 (294,074) (1)  
(274,285) 

Balance Sheet Data: 
Drilling and other property and 
  equipment, net .....................................   $  6,378,814 (1)  
Total assets ...........................................  
Long-term debt (excluding current 
  maturities) (4) .......................................  

1,994,773 

7,164,889 

(In thousands, except per share and ratio data) 

  $2,814,671 
       572,562 (2)  
387,011 

  $2,920,421 
801,606 
548,686 

  $2,986,508 
962,378 
720,477 

  $3,322,419 
    1,255,414 
962,542 

            2.82 
            2.81 

            3.95 
            3.95 

            5.18 
            5.18 

            6.92 
            6.92 

  $6,945,953 (2)(3)    $5,467,227 
  8,391,434 
  8,021,289 

  $4,864,972 
  7,235,286 

  $4,667,469 
  6,964,157 

  1,994,526 

  2,244,189   

  1,496,066 

  1,495,823 

Other Financial Data: 
Capital expenditures .............................   $ 

Cash dividends declared per share  .......  
Ratio of earnings to fixed charges (5) .....  
__________ 

830,655  

  $2,032,764 (3)       $  957,598 
             3.50 
0.50 
             3.50 
(2.45)x (6)              4.64x 
            7.79x 

  $  702,041 

  $  774,756 

             3.50 
           11.11x 

             3.50 
           14.40x 

(1)  During  2015,  we  recorded  an  aggregate  impairment  loss  of  $860.4  million  to  write  down  certain  of  our  drilling  rigs  with 
indicators  of  impairment  to  their  estimated  recoverable  amounts.    See  “Management’s  Discussion  and  Analysis  of  Financial 
Condition  and  Results  of  Operations  (cid:16)(cid:16)  Results  of  Operations--Years  Ended  December  31,  2015,  2014  and  2013--Overview--
2015  Compared  to  2014--  Impairment  of  Assets  and  Note  2  “Asset  Impairments”  to  our  Consolidated  Financial  Statements 
included in Item 8 of this report for a discussion of the 2015 asset impairment. 

(2) 

In  the  third  quarter  of  2014,  we  recorded  an  impairment  loss  of  $109.5  million  to  write  down  six  of  our  mid-water 
semisubmersibles  with  indicators  of  impairment  to  their  estimated  recoverable  amounts.    See  “Management’s  Discussion  and 
Analysis of Financial Condition and Results of Operations -- Results of Operations--Years Ended December 31, 2015, 2014 and 
2013--Overview--2014 Compared to 2013--Impairment of Assets and Note 2 “Asset Impairments” to our Consolidated Financial 
Statements included in Item 8 of this report for a discussion of the 2014 asset impairment. 

(3)  During  2014,  we  took  delivery  of  three  ultra-deepwater  drillships  and  two  deepwater  semisubmersible  rigs.    The  aggregate  net 
book  value  of  these  newly  constructed  rigs  was  $2.7  billion  at  December  31,  2014,  of  which  $1.3  billion  was  reported  in 
construction  work-in-progress  at  December  31,  2013.    See  Note  9  “Drilling  and  Other  Property  and  Equipment”  to  our 
Consolidated Financial Statements included in Item 8 of this report for a discussion of the components of our drilling and other 
property and equipment. 

(4) 

See “Management’s Discussion and Analysis of Financial Condition and Results of Operations -- Liquidity and Capital Resources 
-- Credit Agreement, Commercial Paper Program and Senior Notes” in Item 7 and Note 10 “Credit Agreement and Senior Notes” 
to our Consolidated Financial Statements included in Item 8 of this report for a discussion of changes to our long-term debt. 
23 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
   
   
 
   
   
   
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
(5) 

(6) 

For all periods presented, the ratio of earnings to fixed charges has been computed on a total enterprise basis.  Earnings represent 
pre-tax income from continuing operations plus fixed charges.  Fixed charges include (i) interest, whether expensed or capitalized, 
(ii)  amortization  of  debt  issuance  costs,  whether  expensed  or  capitalized,  and  (iii)  a  portion  of  rent  expense,  which  we  believe 
represents the interest factor attributable to rent. 

The deficiency in our earnings available for fixed charges for the year ended December 31, 2015 was $388.9 million. 

Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations. 

The  following  discussion  should  be  read  in  conjunction  with  our  Consolidated  Financial  Statements 

(including the Notes thereto) in Item 8 of this report.   

We  are  a  leader  in  offshore  drilling,  providing  contract  drilling  services  to  the  energy  industry  around  the 
globe with a fleet of 32 offshore drilling rigs that includes four jack-up rigs which we are marketing for sale.  Our 
fleet consists of 23 semisubmersibles, including the Ocean GreatWhite, which is under construction,  five jack-up 
rigs  and  four  dynamically  positioned  drillships,  including  the  last  of  our  four  newbuild  drillships,  the  Ocean 
BlackLion, which was delivered in the second quarter of 2015.  We expect our harsh environment, ultra-deepwater 
semisubmersible rig, the Ocean GreatWhite, to be delivered in mid-2016.   

Market Overview 

Market  fundamentals  in  the  oil  and  gas  industry  deteriorated  further  in  the  fourth  quarter  of  2015  and  have 
continued to decline in 2016.  In early January 2016, oil prices fell to a 12-year low below $30 per barrel, with 
some industry analysts predicting even lower commodity prices before any market recovery.  Oil markets continue 
to  be  volatile  due  to  a  number  of  geopolitical  and  economic  factors.    These  factors,  combined  with  significant 
operating  losses  incurred  during  the  fourth  quarter  of  2015  by  some  independent  and  national  oil  companies  and 
exploration and production companies, have caused most of  these companies to announce additional cuts to their 
already  reduced  2016  capital  spending  plans,  reflecting  delays  in  planned  drilling  or  exploration  projects,  and,  in 
some cases, termination of projects altogether.  Rig tenders are infrequent and have generally been limited to short-
term  or  well-to-well  work  not  commencing  until  2017  or  later.    There  have  been  very  few  rig  tenders  thus  far  in 
2016.   

The offshore floater market is currently faced with an oversupply of drilling rigs, which thus far has only been 
slightly  abated  by  the  cold  stacking  and  retirement  of  rigs.    The  number  of  available  rigs  continues  to  grow  as 
contracted rigs come off contract and newbuilds are delivered, increasing competition.  Competition for the limited 
number of drilling jobs continues to be intense with some operators bidding multiple rigs on the same job, in some 
cases,  bidding  rigs  of  both  higher  and  lower  specifications.    Operators  are  also  continuing  to  attempt  to  sublet 
previously  contracted  rigs  for  which  capital  spending  programs  have  been  delayed  or  canceled.    Industry  analysts 
have predicted that the offshore contract drilling market may remain depressed with further declines in dayrates and 
utilization likely in 2016 and 2017.   

As a result of the depressed market conditions and continued pessimistic outlook for the near term, certain of 
our  customers,  as  well  as  those  of  our  competitors,  have  attempted  to  renegotiate  or  terminate  existing  drilling 
contracts.    Such  renegotiations  could  include  requests  to  lower  the  contract  dayrate,  lowering  of  a  dayrate  in 
exchange for additional contract term, shortening the term on one contracted rig in exchange for additional term 
on  another  rig,  early  termination  of  a  contract  in  exchange  for  a  lump  sum  margin  payout  and  many  other 
possibilities.  In addition to the potential for renegotiations, some of our drilling contracts permit the customer to 
terminate the contract early after specified notice periods, sometimes resulting in no payment to us or sometimes 
resulting in a contractually specified termination amount, which may not fully compensate us for the loss of the 
contract.    During  depressed  market  conditions,  certain  customers  have  utilized  such  contract  clauses  to  seek  to 
renegotiate or terminate a drilling contract or claim that we have breached provisions of our drilling contracts in 
order  to  avoid  their  obligations  to  us  under  circumstances  where  we  believe  we  are  in  compliance  with  the 
contracts.  Particularly during depressed market conditions, the early termination of a contract may result in a rig 
being  idle  for  an  extended  period  of  time,  which  could  adversely  affect  our  financial  condition,  results  of 
operations and cash flows.  When a customer terminates our contract prior to the contract’s scheduled expiration, 
our  contract  backlog  is  also  adversely  impacted.    See  “Risk  Factors  (cid:16)  We  can  provide  no  assurance  that  our 
drilling  contracts  will  not  be  terminated  early  or  that  our  current  backlog  of  contract  drilling  revenue  will  be 
ultimately realized” and  “–Contract Drilling Backlog” below. 

Our results of operations and cash flows for the year ended December 31, 2015 have been materially impacted 
by  depressed  market  conditions  in  the  offshore  drilling  industry.    We  currently  expect  that  these  adverse  market 
24 

 
 
 
 
 
 
 
 
 
 
 
 
 
conditions will continue for the foreseeable future. The continuation of these conditions for an extended period could 
result in more of our rigs being without contracts and/or cold stacked or scrapped and could further materially and 
adversely affect our financial condition, results of operations and cash flows.  When we cold stack or elect to scrap a 
rig,  we  evaluate  the  rig  for  impairment.    During  2015,  we  recognized  an  aggregate  impairment  loss  of  $860.4 
million, including an impairment loss of $499.4 million recognized in the fourth quarter of 2015.  See “-- Results 
of  Operations--Years  Ended  December  31,  2015,  2014  and  2013--Overview--2015  Compared  to  2014-- 
Impairment  of  Assets,”  “Risk  Factors  —  We  may  incur  additional  asset  impairments  and/or  rig  retirements  as  a 
result  of  reduced  demand  for  certain  offshore  drilling  rigs”  in  Item  1A  of  this  report  and  Note  2  “Asset 
Impairments” to our Consolidated Financial Statements in Item 8 of this report 

As of February 16, 2016, 17 of our rigs were not subject to a drilling contract with a customer, including 14 
rigs that have been cold stacked.  Of the cold-stacked rigs, four jack-up rigs are currently being marketed for sale.   
The  previously  cold-stacked  jack-up  rig  Ocean  Titan  was  sold  in  February  2016.    See  “–  Contract  Drilling 
Backlog” for future commitments of our rigs during 2016 through 2020.   

Although  these  general  market  conditions  impact  all  segments  of  the  offshore  drilling  market,  the  following 

discussion addresses market conditions within segments of the floater market. 

Floater Markets 

Ultra-Deepwater  and  Deepwater  Floaters.  Globally,  the  ultra-deepwater  and  deepwater  floater  markets 
continue  to  be  depressed.  Diminished  or  nonexistent  demand,  combined  with  an  oversupply  of  rigs  has  caused 
floater dayrates to decline significantly.  Offshore drilling contractors have been approached by customers with 
binding contracts, who have sought to and have successfully renegotiated such contracts at lower rates to obtain 
some  financial  relief  in  the  current  market,  and,  in  some  cases,  have  terminated  contracts  with  and  without 
compensation to the associated drilling contractor.  Industry analysts expect offshore drillers to continue to scrap 
older,  lower  specification  rigs;  however,  newer  and  higher  specification  rigs  have  not  been  immune  to  the 
recycling  trend.    In  addition,  industry  analysts  predict  that  the  number  of  uncontracted  floaters  may  more  than 
double by the end of 2016.   

Newbuild rig deliveries and established rigs coming off contract continue to fuel an oversupply of floaters in 
both  the  ultra-deepwater  and  deepwater  markets.    In  an  effort  to  manage  the  oversupply  of  rigs  and  potentially 
avoid  the  cost  of  cold  stacking  newly-built  rigs,  which,  in  the  case  of  dynamically-positioned  rigs,  can  be 
significant, several drilling contractors have exercised options to delay the delivery of rigs by the shipyard or have 
exercised  their  right  to  cancel  orders  due  to  the  late  delivery  of  rigs.    As  of  the  date  of  this  report,  based  on 
industry data, there are approximately 54 competitive, or non-owner-operated, newbuild floaters on order, 32 of 
which  are  not  yet  contracted  for  future  work.    In  addition,  based  on  industry  reports,  there  are  currently  20 
newbuild floaters scheduled for delivery in 2016, of which only four rigs have been contracted for future work; 
however, industry analysts predict that delivery dates may shift as newbuild owners negotiate with their respective 
shipyards. 

Mid-Water Floaters. While conditions in the mid-water market vary slightly by region, mid-water rigs have 
been  adversely  impacted  by  (i)  lower  demand,  (ii)  declining  dayrates,  (iii)  increased  regulatory  requirements, 
including more stringent design requirements for well control equipment, which could significantly increase the 
capital needed to comply with design requirements that would permit such rigs to work in U.S. waters, (iv) the 
challenges  experienced  by  lower  specification  units  in  this  segment  as  a  result  of  more  complex  customer 
specifications,  and  (v)  the  intensified  competition  resulting  from  the  migration  of  some  deepwater  and  ultra-
deepwater units to compete against mid-water units. To date, the mid-water market has seen the highest number of 
cold-stacked  and  scrapped  rigs.    Since  2012,  we  have  sold  12  of  our  mid-water  rigs  for  scrap.      As  market 
conditions remain challenging, we expect higher specification rigs to take the place of lower specification units, 
where possible, leading to additional lower specification rigs being cold stacked or ultimately scrapped.    

Contract Drilling Backlog 

The  following  table  reflects  our  contract  drilling  backlog  as  of  February  16,  2016  (based  on  contract 
information known at that time), October 1, 2015 (the date reported in our Quarterly Report on Form 10-Q for the 
quarter ended September 30, 2015), and February 9, 2015 (the date reported in our Annual Report on Form 10-K 
for  the  year  ended  December  31,  2014).    Contract  drilling  backlog  as  presented  below  includes  only  firm 
commitments (typically represented by signed contracts) and is calculated by multiplying the contracted operating 
dayrate by the firm contract period and adding one-half of any potential rig performance bonuses.  Our calculation 

25 

 
 
 
 
 
 
 
 
 
also assumes full utilization of our drilling equipment for the contract period (excluding scheduled shipyard and 
survey  days);  however,  the  amount  of  actual  revenue  earned  and  the  actual  periods  during  which  revenues  are 
earned will be different than the amounts and periods shown in the tables below due to various factors.  Utilization 
rates, which generally approach 92-98% during contracted periods, can be adversely impacted by downtime due 
to  various  operating  factors  including,  but  not  limited  to,  weather  conditions  and  unscheduled  repairs  and 
maintenance.  Contract drilling backlog excludes revenues for mobilization, demobilization, contract preparation 
and customer reimbursables.  No revenue is generally earned during periods of downtime for regulatory surveys.  
Changes in our contract drilling backlog between periods are generally a function of the performance of work on 
term contracts, as well as the extension or modification of existing term contracts and the execution of additional 
contracts.    In  addition,  under  certain  circumstances,  our  customers  may  seek  to  terminate  or  renegotiate  our 
contracts.  See “Risk Factors — We can provide no assurance that our drilling contracts will not be terminated 
early or that our current backlog of contract drilling revenue will be ultimately realized” in Item 1A of this report, 
which is incorporated herein by reference.   

February 16, 
2016  

October 1, 
2015  
(In thousands) 

February 9, 
2015  

Contract Drilling Backlog  
  Floaters: 

  Ultra-Deepwater (1) .........................................................  
  Deepwater ......................................................................  
  Mid-Water ......................................................................  
Total Floaters .............................................................  

$  

4,415,000 
375,000 
356,000 
5,146,000 

  $  

Jack-ups ................................................................................  
Total ...........................................................................  

$  

49,000 
5,195,000 

  $  

4,851,000 
439,000 
401,000 
5,691,000 

18,000 
5,709,000 

  $  

  $  

5,390,000 
748,000 
611,000 
6,749,000 

91,000 
6,840,000 

(1)  Contract  drilling  backlog  as  of  February  16,  2016  for  our  ultra-deepwater  floaters  includes  $641.0 
million  for  the  years  2016  to  2019  attributable  to  future  work  for  the  semisubmersible  Ocean 
GreatWhite, which is under construction. 

The following table reflects the amount of our contract drilling backlog by year as of February 16, 2016. 

Contract Drilling Backlog 
  Floaters: 

Total 

For the Years Ending December 31, 
2016 (1) 

2017 

2018 

2019 - 2020 

(In thousands) 

  Ultra-Deepwater (2) ....................... $  4,415,000 
375,000 
  Deepwater ....................................
  Mid-Water ....................................
356,000 
5,146,000 
Total Floaters ...........................

$  1,106,000 
238,000 
222,000 
1,566,000 

$ 1,201,000 
   137,000 
   134,000 
   1,472,000 

$ 1,142,000 
-- 
-- 
   1,142,000 

$ 

966,000 
-- 
-- 
966,000 

Jack-ups ..............................................

49,000 
Total ......................................... $  5,195,000 

42,000 
$  1,608,000 

7,000 
$ 1,479,000 

-- 
$ 1,142,000 

-- 
966,000 

$ 

(1)  Represents the twelve-month period beginning January 1, 2016. 
(2)  Contract drilling backlog as of February 16, 2016 for our ultra-deepwater floaters includes $90.0 million 
for the year 2016, $214.0 million for each of the years 2017 and 2018, and $123.0 million for the year 
2019 attributable to future work for the Ocean GreatWhite, which is under construction.   

The  following  table  reflects  the  percentage  of  rig  days  committed  by  year  as  of  February  16,  2016.    The 
percentage  of  rig  days  committed  is  calculated  as  the  ratio  of  total  days  committed  under  contracts,  as  well  as 
scheduled shipyard, survey and mobilization days for all rigs in our fleet, to total available days (number of rigs 
multiplied by the number of days in a particular year).  Total available days have been calculated based on the 
expected final commissioning date for the Ocean GreatWhite, which is under construction. 

26 

 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
   
     
     
 
   
     
     
 
 
   
     
     
 
 
   
   
 
   
     
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
   
 
 
  
 
   
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
  
   
 
 
 
 
 
 
 
 
For the Years Ending December 31, 

2016 (1) 

2017 

2018 

2019 - 2020 

Rig Days Committed (2) 

  Floaters: 

  Ultra-Deepwater  ............................................................  
  Deepwater ......................................................................  
  Mid-Water ......................................................................  
  All Floaters ....................................................................  
Jack-ups ................................................................................  

67% 
30% 
28% 
45% 
19% 

58% 
17% 
12% 
34% 
3% 

57% 
-- 
-- 
25% 
-- 

25% 
-- 
-- 
11% 
-- 

(1)  Represents the twelve-month period beginning January 1, 2016. 
(2)  As of February 16, 2016, includes approximately 535 currently known, scheduled shipyard days for rig 
commissioning,  contract  preparation,  surveys  and  extended  maintenance  projects,  as  well  as  rig 
mobilization days, for the year 2016. 

Important Factors That May Impact Our Operating Results, Financial Condition or Cash Flows  

Operating  Income.    Our  operating  income  is  primarily  a  function  of  contract  drilling  revenue  earned  less 
contract  drilling  expenses  incurred  or  recognized.    The  two  most  significant  variables  affecting  our  contract 
drilling revenue are the dayrates earned and utilization rates achieved by our rigs, each of which is a function of rig 
supply and demand  in the  marketplace.   These factors are  not within our  control and are difficult  to predict.  We 
generally recognize revenue from dayrate drilling contracts as services are performed.  Consequently, when a rig is 
idle, no dayrate is earned and revenue will decrease as a result.   

Revenue is also affected by the acquisition or disposal of rigs, rig mobilizations, required surveys and shipyard 
projects.  In connection with certain drilling contracts, we may receive fees for the mobilization of equipment.  In 
addition, some of our drilling contracts require downtime before the start of the contract to prepare the rig to meet 
customer  requirements  for  which  we  may  or  may  not  be  compensated.    We  earn  these  fees  as  services  are 
performed over the initial term of the related drilling contracts.  We defer mobilization and contract preparation 
fees received (on either a lump-sum or dayrate basis), as well as direct and incremental costs associated with the 
mobilization of equipment and contract preparation activities, and amortize each, on a straight-line basis, over the 
term of the related drilling contracts.  Absent a contract, mobilization costs are recognized currently. 

Operating  income  also  fluctuates  due  to  varying  levels  of  contract  drilling  expenses.    Our  operating  expenses 
represent  all  direct  and  indirect  costs  associated  with  the  operation  and  maintenance  of  our  drilling  equipment, 
which generally are not affected by changes in dayrates and short-term reductions in utilization.  For instance, if a 
rig is to be idle for a short period of time, few decreases in operating expenses may actually occur since the rig is 
typically maintained in a prepared or “warm stacked” state with a full crew.  In addition, when a rig is idle, we are 
responsible for certain operating expenses such as rig fuel and supply boat costs, which are typically costs of the 
operator when a rig is under contract.  However, if a rig is expected to be idle for an extended period of time, we 
may  reduce  the  size  of  a  rig’s  crew  and  take  steps  to  “cold  stack”  the rig, which  lowers  expenses  and partially 
offsets the impact on operating income.  The cost of cold stacking a rig can vary depending on the type of rig.  
The cost of cold stacking a drillship, for example, is typically substantially higher than the cost of cold stacking a 
jack-up rig or an older floater rig.   

The principal components of our operating costs are, among other things, direct and indirect costs of labor 
and benefits, repairs and maintenance, freight, regulatory inspections, boat and helicopter rentals and insurance.  
Labor and repair and maintenance costs represent the most significant components of our operating expenses.  In 
general,  our  labor  costs  increase  primarily  due  to  higher  salary  levels,  rig  staffing  requirements  and  costs 
associated  with  labor  regulations  in  the  geographic  regions  in  which  our  rigs  operate.    In  addition,  the  costs 
associated  with  training  new  and  seasoned  employees  can  be  significant.    Costs  to  repair  and  maintain  our 
equipment  fluctuate  depending  upon  the  type  of  activity  the  drilling  unit  is  performing,  as  well  as  the  age  and 
condition of the equipment and the regions in which our rigs are working.   

Regulatory Surveys and Planned Downtime.  Our operating income is negatively impacted when we perform 
certain  regulatory  inspections,  which  we  refer  to  as  a  5-year  survey,  or  special  survey,  that  are  due  every  five 
years  for  each  of  our  rigs.    Operating  revenue  decreases  because  these  special  surveys  are  generally  performed 

27 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
during scheduled downtime in a shipyard.  Operating expenses increase as a result of these special surveys due to 
the cost to mobilize the rigs to a shipyard, inspection costs incurred and repair and maintenance costs, which are 
recognized as incurred.  Repair and maintenance activities may result from the special survey or may have been 
previously  planned  to  take  place  during  this  mandatory  downtime.    The  number  of  rigs  undergoing  a  5-year 
survey will vary from year to year, as well as from quarter to quarter.   

In addition, operating income may also be negatively impacted by intermediate surveys, which are performed 
at  interim  periods  between  5-year  surveys.    Intermediate  surveys  are  generally  less  extensive  in  duration  and 
scope than a 5-year survey.  Although an intermediate survey may require some downtime for the drilling rig, it 
normally  does  not  require  dry-docking  or  shipyard  time,  except  for  rigs  generally  older  than  15  years  that  are 
located in the United Kingdom sector of the North Sea. 

During 2016, we expect to spend approximately 535 days for the mobilization of rigs and contract acceptance 
testing,  including  days  associated  with  mobilization  and  acceptance  testing  for  the  Ocean  GreatWhite 
(approximately  90  days),  which  is  under  construction  and  expected  to  be  delivered  in  mid-2016  and  rig 
modifications  and  acceptance  testing  for  the  Ocean  BlackRhino,  which  is  scheduled  to  begin  operating  under  a 
new  contract  in  January  2017  (approximately  155  days).    We  expect  the  Ocean  Endeavor  to  be  unavailable 
through mid-2016 (approximately 135 days) as it demobilizes out of the Black Sea.  We can provide no assurance 
as  to  the  exact  timing  and/or  duration  of  downtime  associated  with  regulatory  inspections,  planned  rig 
mobilizations and other shipyard projects.  See “ – Contract Drilling Backlog.” 

In  April  2015,  the  Bureau  of  Safety  and  Environmental  Enforcement  (an  agency  established  by  the  U.S. 
Department of the Interior that governs the offshore drilling industry on the Outer Continental Shelf) announced 
proposed  rules  that,  when  enacted,  will  include  more  stringent  design  requirements  for  well  control  equipment 
used in offshore drilling operations. Based on our assessment of the proposed rules, we believe that we may need 
to  incur  significant  capital  costs  to  comply  with  the  additional  design  requirements  to  enable  our  cold-stacked 
mid-water semisubmersibles to return to work in U.S. waters. 

Physical  Damage  and  Marine  Liability  Insurance.    We  are  self-insured  for  physical  damage  to  rigs  and 
equipment  caused  by  named  windstorms  in  the  GOM.    If  a  named  windstorm  in  the  GOM  causes  significant 
damage  to  our  rigs  or  equipment,  it  could  have  a  material  adverse  effect  on  our  financial  condition,  results  of 
operations and cash flows.  Under our insurance policy, we carry physical damage insurance for certain losses other 
than those caused by named windstorms in the GOM for which our deductible for physical damage is $25.0 million 
per occurrence.  We do not typically retain loss-of-hire insurance policies to cover our rigs. 

In  addition,  under  our  current  insurance  policy,  we  carry  marine  liability  insurance  covering  certain  legal 
liabilities, including coverage for certain personal injury claims, and generally covering liabilities arising out of or 
relating to pollution and/or environmental risk.  We believe that the policy limit for our marine liability insurance is 
within the range that is customary for companies of our size in the offshore drilling industry and is appropriate for 
our business.  Our deductibles for marine liability coverage, including for personal injury claims, are $25.0 million 
for the first occurrence and vary in amounts ranging between $5.0 million and, if aggregate claims exceed certain 
thresholds, up to $100.0 million for each subsequent occurrence, depending on the nature, severity and frequency of 
claims that might arise during the policy year. 

Construction and Capital Upgrade Projects.  We capitalize interest cost for the construction and upgrade of 
qualifying assets in accordance with accounting principles generally accepted in the U.S., or GAAP.  The period 
of interest capitalization covers the duration of the activities required to make the asset ready for its intended use, 
and the capitalization period ends when the asset is substantially complete and ready for its intended use, which is 
expected  to  continue  after  delivery  of  the  rigs  from  the  shipyard  and  until  the  user  acceptance  phase  of  each 
project  is  completed.    For  the  year  ended  December  31,  2015,  we  capitalized  interest  of  $16.3  million  on 
qualifying expenditures related to the construction of the Ocean GreatWhite and the Ocean BlackLion, until it was 
placed in service in June 2015.  We will continue capitalizing interest on qualifying expenditures during 2016 for 
the Ocean GreatWhite, which is expected to be completed in mid-2016.  

Impact of Changes in Tax Laws or Their Interpretation.  We operate through our various subsidiaries in a 

number of countries throughout the world.  As a result, we are subject to highly complex tax laws, treaties and 
regulations in the jurisdictions in which we operate, which may change and are subject to interpretation.  Changes 
in laws, treaties and regulations and the interpretation of such laws, treaties and regulations may put us at risk for 
future tax assessments and liabilities which could be substantial and could have a material adverse effect on our 
financial condition, results of operations and cash flows.   

28 

 
 
 
 
 
 
 
 
 
 
Critical Accounting Estimates 

Our  significant  accounting  policies  are  included  in  Note  1  “General  Information”  to  our  Consolidated 
Financial  Statements  in  Item  8  of  this  report.    Judgments,  assumptions  and  estimates  by  our  management  are 
inherent in the preparation of our financial statements and the application of our significant accounting policies.  
We believe that our most critical accounting estimates are as follows: 

Property,  Plant  and  Equipment.    We  carry  our  drilling  and  other  property  and  equipment  at  cost,  less 
accumulated depreciation.  Maintenance and routine repairs are charged to income currently while replacements 
and betterments that upgrade or increase the functionality of our existing equipment and that significantly extend 
the  useful  life  of  an  existing  asset,  are  capitalized.    Significant  judgments,  assumptions  and  estimates  may  be 
required in determining whether or not such replacements and betterments meet the criteria for capitalization and 
in  determining  useful  lives  and  salvage  values  of  such  assets.    Changes  in  these  judgments,  assumptions  and 
estimates  could  produce  results  that  differ  from  those  reported.    Historically,  the  amount  of  capital  additions 
requiring  significant  judgments,  assumptions  or  estimates  has  not  been  significant.    During  the  years  ended 
December 31, 2015 and 2014, we capitalized $262.4 million and $546.0 million, respectively, in replacements and 
betterments of our drilling fleet. 

  We evaluate our property and equipment for impairment whenever changes in circumstances indicate that the 
carrying  amount  of  an  asset  may  not  be  recoverable  (such  as,  but  not  limited  to,  cold  stacking  a  rig,  the 
expectation of cold stacking a rig in the near term, contracted backlog of less than one year for a rig, a decision to 
retire or scrap a rig, or excess spending over budget on a newbuild, construction project or major rig upgrade).  
We utilize an undiscounted probability-weighted cash flow analysis in testing an asset for potential impairment.  
Our assumptions and estimates underlying this analysis include the following: 

(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

dayrate by rig;  
utilization rate by rig if active, warm stacked or cold stacked (expressed as the actual percentage of 
time per year that the rig would be used at certain dayrates); 
the per day operating cost for each rig if active, warm stacked or cold stacked;  
the estimated annual cost for rig replacements and/or enhancement programs; 
the estimated maintenance, inspection or other costs associated with a rig returning to work; 
salvage value for each rig; and 
estimated proceeds that may be received on disposition of each rig.  

Based  on  these  assumptions,  we  develop  a  matrix  for  each  rig  under  evaluation  using  multiple 
utilization/dayrate  scenarios,  to  each  of  which  we  have  assigned  a  probability  of  occurrence.    We  arrive  at  a 
projected probability-weighted cash flow for each rig based on the respective matrix and compare such amount to 
the carrying value of the asset to assess recoverability. 

The underlying assumptions and assigned probabilities of occurrence for utilization and dayrate scenarios are 
developed using a methodology that examines historical data for each rig, which considers the rig’s age, rated water 
depth  and  other  attributes  and  then  assesses  its  future  marketability  in  light  of  the  current  and  projected  market 
environment at the time of assessment.  Other assumptions, such as operating, maintenance and inspection costs, 
are  estimated  using  historical  data  adjusted  for  known  developments  and  future  events  that  are  anticipated  by 
management at the time of the assessment.   

  Management’s  assumptions  are  necessarily  subjective  and  are  an  inherent  part  of  our  asset  impairment 
evaluation,  and  the  use  of  different  assumptions  could  produce  results  that  differ  from  those  reported.    Our 
methodology generally involves the use of significant unobservable inputs, representative of a Level 3 fair value 
measurement,  which  may  include  assumptions  related  to  future  dayrate  revenue,  costs  and  rig  utilization,  quotes 
from  rig  brokers,  the  long-term  future  performance  of  our  rigs  and  future  market  conditions.    Management’s 
assumptions involve uncertainties about future demand for our services, dayrates, expenses and other future events, 
and  management’s  expectations  may  not  be  indicative  of  future  outcomes.    Significant  unanticipated  changes  to 
these  assumptions  could  materially  alter  our  analysis  in  testing  an  asset  for  potential  impairment.    For  example, 
changes in market conditions that exist at the measurement date or that are projected by management could affect 
our  key  assumptions.    Other  events  or  circumstances  that  could  affect  our  assumptions  may  include,  but  are  not 
limited to, a further sustained decline in oil and gas prices, cancelations of our drilling contracts or contracts of our 
competitors,  contract  modifications,  costs  to  comply  with  new  governmental  regulations,  growth  in  the  global 
oversupply of oil and geopolitical events, such as lifting sanctions on oil-producing nations.  Should actual market 

29 

 
 
 
  
 
 
 
 
 
 
 
conditions  in  the  future  vary  significantly  from  market  conditions  used  in  our  projections,  our  assessment  of 
impairment would likely be different.   

During  2015,  in  response  to  pending  regulatory  requirements  in  the  GOM,  as  well  as  the  continued 
deterioration of the market fundamentals in the oil and gas industry, including the dramatic decline in oil prices, 
significant cutbacks in customer capital spending plans and contract cancelations by customers, we evaluated 25 
of our drilling rigs with indications that their carrying amounts may not be recoverable and recorded an aggregate 
impairment loss of $860.4 million related to 17 drilling rigs, consisting of two ultra-deepwater, one deepwater and 
nine mid-water floaters and five jack-up rigs.   In the third quarter of 2014, we recognized an impairment loss of 
$109.5 million in connection with our management’s decision to retire and scrap six mid-water semisubmersible 
rigs.    See  “  –  Results  of  Operations  –Years  Ended  December  31,  2015,  2014  and  2013  –  Overview  –  2015 
Compared to 2014 – Impairment of Assets,” “ – Results of Operations –Years Ended December 31, 2015, 2014 
and 2013 – Overview – 2014 Compared to 2013 – Impairment of Assets”  and Note 2 “Asset Impairments” to our 
Consolidated Financial Statements in Item 8 of this report. 

Personal  Injury  Claims.    Our  deductibles  for  liability  coverage  for  personal  injury  claims,  which  primarily 
result from Jones Act liability in the Gulf of Mexico, are currently $25.0 million for the first occurrence, with no 
aggregate deductible, and vary in amounts ranging between $5.0 million and, if aggregate claims exceed certain 
thresholds, up to $100.0 million for each subsequent occurrence, depending on the nature, severity and frequency 
of claims which might arise during the policy year.  The Jones Act is a federal law that permits seamen to seek 
compensation for certain injuries during the course of their employment on a vessel and governs the liability of 
vessel operators and marine employers for the work-related injury or death of an employee.  We engage outside 
consultants  to  assist  us  in  estimating  our  aggregate  liability  for  personal  injury  claims  based  on  our  historical 
losses and utilizing various actuarial models.   

The models used in estimating our aggregate reserve for personal injury claims include actuarial assumptions 

such as: 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

claim emergence, or the delay between occurrence and recording of claims; 
settlement patterns, or the rates at which claims are closed; 
development patterns, or the rate at which known cases develop to their ultimate level; 
average, potential frequency and severity of claims; and  
effect of re-opened claims. 

The eventual settlement or adjudication of these claims could differ materially from our estimated amounts 

due to uncertainties such as: 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

the severity of personal injuries claimed; 
significant changes in the volume of personal injury claims; 
the unpredictability of legal jurisdictions where the claims will ultimately be litigated; 
inconsistent court decisions; and 
the risks and lack of predictability inherent in personal injury litigation. 

Income  Taxes.    We  account  for  income  taxes  in  accordance  with  accounting  standards  that  require  the 
recognition of the amount of taxes payable or refundable for the current year and an asset and liability approach in 
recognizing the amount of deferred tax liabilities and assets for the future tax consequences of events that have been 
currently recognized in our financial statements or tax returns.  In each of our tax jurisdictions we recognize a current 
tax liability or asset for the estimated taxes payable or refundable on tax returns for the current year and a deferred 
tax  asset  or  liability  for  the  estimated  future  tax  effects  attributable  to  temporary  differences  and  carryforwards.  
Deferred tax assets are reduced by a valuation allowance, if necessary, which is determined by the amount of any tax 
benefits that, based on available evidence, are not expected to be realized under a “more likely than not” approach.  
We do not establish deferred tax liabilities for certain of our foreign earnings that we intend to indefinitely reinvest to 
finance  foreign  activities.    However,  if  these  earnings  become  subject  to  U.S.  federal  tax,  any  required  provision 
could  have  a  material  adverse  impact  on  our  financial  results.    We  make  judgments  regarding  future  events  and 
related  estimates  especially  as  they  pertain  to  the  forecasting  of  our  effective  tax  rate,  the  potential  realization  of 
deferred tax assets such as utilization of foreign tax credits, and exposure to the disallowance of items deducted on 
tax returns upon audit. 

30 

 
 
 
 
 
 
 
 
 
 
 
 
Certain  of  our  international  rigs  are  owned  and  operated,  directly  or  indirectly,  by  Diamond  Foreign  Asset 
Company, or DFAC, a Cayman Islands subsidiary that we own.  It is our intention to indefinitely reinvest future 
earnings  of  DFAC  and  its  foreign  subsidiaries  to  finance  foreign  activities.    Accordingly,  we  have  not  made  a 
provision  for  U.S.  income  taxes  on  approximately  $2.0  billion  of  undistributed  foreign  earnings  and  profits.  
Although we do not intend to repatriate the earnings of DFAC and have not provided U.S. income taxes for such 
earnings, except to the extent that such earnings were immediately subject to U.S. income taxes, these earnings 
could  become  subject  to  U.S.  income  tax  if  remitted,  or  if  deemed  remitted  as  a  dividend;  however,  it  is  not 
practicable to estimate this potential liability.   

In several of the international locations in which we operate, certain of our wholly-owned subsidiaries enter 
into  agreements  with  other  of  our  wholly-owned  subsidiaries  to  provide  specialized  services  and  equipment  in 
support  of  our  foreign  operations.   We  apply  a  transfer  pricing  methodology  to  determine  the  amount  to  be 
charged for providing the services and equipment, and utilize outside consultants to assist us in the development 
of  such  transfer  pricing  methodologies.  In  most  cases,  there  are  alternative  transfer  pricing  methodologies  that 
could be applied to these transactions and, if applied, could result in different chargeable amounts.  

31 

 
 
 
 
 
Results of Operations 

Although we perform contract drilling services with different types of drilling rigs and in many geographic 
locations, there is a similarity of economic characteristics due to the nature of the revenue earning process as it 
relates  to  the  offshore  drilling  industry,  over  the  operating  lives  of  our  drilling  rigs.  We  believe  that  the 
combination  of  our  drilling  rigs  into  one  reportable  segment  is  the  appropriate  aggregation  in  accordance  with 
applicable accounting standards on segment reporting.  However, for purposes of this discussion and analysis of 
our  results  of  operations,  we  provide  greater  detail  with  respect  to  the  types  of  rigs  in  our  fleet  to  enhance  the 
reader’s understanding of our financial condition, changes in financial condition and results of operations.    

Key performance indicators by equipment type are listed below.   

REVENUE EARNING DAYS (1) 
  Floaters: 
    Ultra-Deepwater ..........................................  
    Deepwater ...................................................  
    Mid-Water ...................................................  
  Jack-ups ........................................................  

UTILIZATION (2) 
  Floaters: 
    Ultra-Deepwater ..........................................  
    Deepwater (3) ...............................................  
    Mid-Water ...................................................  
  Jack-ups ........................................................  

AVERAGE DAILY REVENUE (4) 
  Floaters: 
    Ultra-Deepwater ..........................................  
    Deepwater ...................................................  
    Mid-Water ...................................................  
  Jack-ups ........................................................  

Year Ended December 31, 
2014 

  2013 

2015 

             2,690 
             1,339 
             1,433 
                909 

             2,151 
             1,206 
             3,969 
             1,845 

             2,392 
             1,530 
             4,186 
             1,949 

               64% 
               52% 
               36% 
               42% 

               65% 
               55% 
               61% 
               78% 

               82% 
               84% 
               64% 
               76% 

$ 
497,700 
       409,800 
       270,500 
         93,400 

$ 
459,100 
       409,800 
       271,300 
         96,700 

$ 
357,300 
       403,300 
       286,200 
         89,300 

(1)  A  revenue  earning  day  is  defined  as  a  24-hour  period  during  which  a  rig  earns  a  dayrate  after 
commencement of operations and excludes mobilization, demobilization and contract preparation 
days. 

(2)  Utilization  is  calculated  as  the  ratio  of  total  revenue-earning  days  divided  by  the  total  calendar 
days in the period for all specified rigs in our fleet (including cold-stacked rigs, but excluding rigs 
under  construction).    As  of  December  31,  2015,  our  cold  stacked  rigs  consisted  of  one  ultra-
deepwater,  two  deepwater  and  four  mid-water  semisubmersible  rigs.    In  addition,  we  had  five 
cold-stacked jack-up rigs which are being marketed for sale.  As of December 31, 2014, six of our 
mid-water  semisubmersible  drilling  rigs  were  cold  stacked,  all  of  which  were  sold  for  scrap  in 
2015.   

(3)  Utilization for our deepwater floaters in 2015 included 365 total calendar days for the Ocean Apex, 

which was placed in service in December 2014. 

(4)  Average daily revenue is defined as total contract drilling revenue for all of the specified rigs in 

our fleet per revenue earning day. 

32 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Comparative data relating to our revenues and operating expenses by equipment type are listed below.   

Years Ended December 31, 2015, 2014 and 2013 

Year Ended December 31, 

2015 

             2014 

            2013 

(In thousands) 

CONTRACT DRILLING REVENUE 
  Floaters: 
    Ultra-Deepwater ..........................................................  $  1,339,059 
548,667 
    Deepwater ................................................................... 
    Mid-Water ................................................................... 
387,549 
      Total Floaters ............................................................        2,275,275 
  Jack-ups ........................................................................ 
84,909 
  Total Contract Drilling Revenue ................................  $  2,360,184 

$ 

987,565 
494,247 
    1,076,842 
    2,558,654 
178,472 
$  2,737,126 

$ 

854,515 
617,080 
    1,197,934 
    2,669,529 
174,055 
$  2,843,584 

REVENUES RELATED TO REIMBURSABLE 
EXPENSES ..................................................................  $ 

59,209 

$ 

77,545 

$ 

76,837 

CONTRACT DRILLING EXPENSE 
  Floaters: 
    Ultra-Deepwater ..........................................................  $ 
620,122 
    Deepwater ................................................................... 
277,779 
    Mid-Water ................................................................... 
230,606 
      Total Floaters ............................................................     
1,128,507 
  Jack-ups 
65,699 
33,658 
  Other ............................................................................. 
Total Contract Drilling Expense ..................................  $  1,227,864 

$ 

536,615 
292,050 
535,080 
1,363,745 
111,204 
48,674 
$  1,523,623 

$ 

538,765 
267,820 
604,492 
1,411,077 
115,078 
46,370 
$  1,572,525 

REIMBURSABLE EXPENSES ...................................  $ 

58,050 

$ 

76,091 

$ 

74,967 

OPERATING INCOME 
  Floaters: 
718,937 
    Ultra-Deepwater ..........................................................  $ 
270,888 
    Deepwater ................................................................... 
156,943 
    Mid-Water ................................................................... 
 1,146,768 
      Total Floaters ............................................................     
19,210 
  Jack-ups ........................................................................ 
(33,658) 
  Other ............................................................................. 
1,159 
  Reimbursable expenses, net .......................................... 
(493,162) 
  Depreciation .................................................................. 
(66,462) 
  General and administrative expense .............................. 
-- 
  Bad debt expense .......................................................... 
(860,441) 
  Impairment of assets ..................................................... 
(9,778) 
  Restructuring and separation costs ................................ 
  Gain on disposition of assets ......................................... 
2,290 
  Total Operating (Loss) Income ..................................  $     (294,074) 

$ 

450,950 
202,197 
541,762 
 1,194,909 
67,268 
(48,674) 
1,454 
(456,483) 
(81,832) 
-- 
(109,462) 
-- 
5,382 
$       572,562 

$ 

315,750 
349,260 
593,442 
 1,258,452 
58,977 
(46,370) 
1,870 
(388,092) 
(64,788) 
         (22,513) 
-- 
-- 
4,070 
$       801,606 

Other income (expense): 
  Interest income .............................................................. 
  Interest expense ............................................................. 
  Foreign currency transaction gain (loss) ....................... 
  Other, net....................................................................... 
(Loss) income before income tax benefit (expense) ........ 
Income tax benefit (expense) .......................................... 

3,322 
(93,934) 
2,465 
873 
  (381,348) 
  107,063 

801 
(62,053) 
3,199 
682 
  515,191 
  (128,180) 

701 
(24,843) 
(4,915) 
1,691 
  774,240 
  (225,554) 

NET (LOSS) INCOME .................................................  $     (274,285) 

$    387,011 

$    548,686 

33 

 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
  
  
 
 
 
Overview 

2015 Compared to 2014 

Operating  (Loss)  Income.    We  incurred  an  operating  loss  of  $294.1  million  in  2015  compared  to  operating 
income of $572.6 million in 2014.  Our operating results for 2015 reflected an aggregate impairment loss of $860.4 
million, $9.8 million in restructuring and severance costs, and a $96.2 million net reduction in rig operating results 
for our combined floater fleet and jack-up rigs, compared to 2014.  Depreciation expense increased $36.7 million in 
2015, compared to 2014, due to a higher depreciable asset base in 2015, including the Ocean Apex and two newbuild 
drillships, which were placed in service in December 2014, partially offset by the absence of depreciation for certain 
of our rigs that were impaired or sold during late 2014 and in 2015.   

Total contract drilling revenue declined $376.9 million, or 14%, during 2015 compared to 2014, primarily due to 
a $782.9 million decrease in revenue earned by our combined mid-water and jack-up fleets, partially offset by an 
aggregate $405.9 million increase in revenue earned by our ultra-deepwater and deepwater floaters.  Our results 
for 2015 reflected an aggregate 2,800 fewer revenue earning days, compared to 2014, primarily, due to the cold 
stacking of additional rigs, rig sales and incremental downtime between contracts, partially offset by incremental 
revenue generating days for our newly constructed and upgraded or enhanced rigs. 

Total contract drilling expense for 2015 decreased $295.8 million, or 19%, compared to the prior year, primarily 
due to lower rig utilization, combined with our efforts to control costs.  Contract drilling expense for 2015, compared 
to  2014,  reflected  lower  costs  for  labor  and  personnel  ($165.8  million),  repairs  and  maintenance  ($70.1  million), 
inspections  ($17.2  million),  freight  ($17.9  million),  rig  insurance  ($9.7  million)  and  a  net  decrease  in  other  rig 
operating  costs,  including  costs  associated  with  our  international  shorebases,  overhead  costs  and  revenue-based 
agency fees ($72.6 million), partially offset by higher rig mobilization expense ($57.6 million).  

         Impairment of Assets.  During the third quarter of 2014, our management adopted a plan to scrap six of our 
mid-water  semisubmersible  rigs,  all  of  which  were  sold  by  the  end  of  2015.    As  a  result  of  this  decision,  we 
recognized an impairment loss of $109.5 million during 2014 to write down the aggregate net book value of these 
rigs to their estimated recoverable amounts. During 2015, in response to pending regulatory requirements in the 
GOM,  as  well  as  the  continued  deterioration  of  the  market  fundamentals  in  the  oil  and  gas  industry,  we 
determined that the carrying value of 17 of our rigs, consisting of two ultra-deepwater, one deepwater and nine 
mid-water floaters and five jack-up rigs were impaired and, therefore, recorded an aggregate impairment loss of 
$860.4 million for the year ended December 31, 2015.  See “ --Critical Accounting Estimates - Property, Plant 
and  Equipment”  and  Note  2  “Asset  Impairments”  to  our  Consolidated  Financial  Statements  in  Item  8  of  this 
report.  

Restructuring and Separation Costs.  In response to the continued decline in the offshore drilling market, we 
have reviewed our cost and organization structure.  As a result, our management approved and initiated a reduction 
in workforce at our onshore bases and corporate facilities.  During the year ended December 31, 2015, we recognized 
$9.8 million in restructuring and employee separation related costs on behalf of separated employees. 

      Interest  Expense,  Net  of  Amounts  Capitalized.    Interest  expense  increased  $31.9  million  during  2015, 
compared  to  2014,  primarily  as  a  result  of  less  interest  capitalized  during  2015  ($44.3  million)  due  to  the 
completion  of  five  qualifying  construction  projects  in  2014  and  2015.    This  increase  was  partially  offset  by  a 
$12.3 million reduction in interest expense for 2015, primarily due to the repayment of two tranches of our senior 
notes in September 2014 and July 2015, reduced by additional interest expense on short-term borrowings during 
2015.  

Income Tax Expense.  Our effective tax rate for 2015 was 28.1%, compared to a 24.9% effective tax rate for 
2014.  The higher effective tax rate in 2015 was due to differences in the mix of our domestic and international 
pre-tax earnings and losses, including asset impairments taken during both 2015 and 2014 in various jurisdictions, 
with  differing  tax  consequences.    The  2014  period  also  included  the  reversal  of  $55.4  million  of  reserves  for 
uncertain tax positions in various foreign jurisdictions which were settled in our favor or for which the statute of 
limitations had expired, compared to a similar reversal of $9.5 million in 2015.    

2014 Compared to 2013 

Operating  Income.    Operating  income  decreased  $229.0  million,  or  29%,  during  2014,  compared  to  2013, 
primarily due to a $106.5 million, or 4%, reduction in contract drilling revenue combined with the negative effects of 

34 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
a  $109.5  million  impairment  loss  recognized  in  the  third  quarter  of  2014,  higher  depreciation  ($68.4  million)  and 
higher general and administrative expenses ($17.0 million).  During 2014, we recognized incremental depreciation 
expense on a higher depreciable asset base, compared to 2013, which included the following newly constructed rigs 
placed  in  service  during  2014:    Ocean  Onyx  (January  2014),  Ocean  BlackHawk  (February  2014)  and  Ocean 
BlackHornet,  Ocean  BlackRhino  and  Ocean  Apex  (December  2014).  General  and  administrative  costs  for  2014 
reflected higher employee compensation and professional fees than those incurred in the prior year, primarily related 
to compensation of and termination benefits paid to certain of our current and former key executives.  These negative 
effects  were  partially  offset  by  a  $48.9  million  reduction  in  contract  drilling  expense  and  the  absence  of  a  $22.5 
million charge for an uncollectible receivable incurred in 2013. 

Contract  drilling  revenue  for  our  deepwater  and  mid-water  fleets  decreased  $122.8  million  and  $121.1 
million, respectively, during 2014, compared to 2013, primarily as a result of 324 and 217 fewer revenue earning 
days,  respectively,  combined  with  the  effect  of  a  lower  average  daily  revenue  earned  by  our  mid-water  floater 
fleet.  In  contrast,  contract  drilling  revenue  earned  by  our  ultra-deepwater  floaters  and  jack-up  rigs  increased 
$133.1  million  and  $4.4  million,  respectively,  during  2014,  compared  to  2013,  primarily  due  to  higher  average 
daily  revenue  earned  by  both  our  ultra-deepwater  and  jack-up  fleets  despite  an  aggregate  345-day  reduction  in 
revenue earning days during 2014. 

Total contract drilling expense during 2014 decreased by $48.9 million, or 3%, compared to 2013, primarily due 
to  the  cold  stacking  or  scrapping  of  rigs,  contract  preparation  work  and  lower  repairs  and  maintenance  expenses, 
partially offset by increased costs associated with the operation of the Ocean BlackHawk and Ocean Onyx beginning 
in the first quarter of 2014. 

Impairment of Assets.   During the third quarter of 2014, our management adopted a plan to scrap six of our mid-
water semisubmersibles.  As a result of this decision, we recognized an impairment loss of $109.5 million to write 
down the aggregate net book value of these rigs to their estimated recoverable amounts.  

Bad Debt Expense.  During 2013, based on our assessment of the financial condition of two of our customers, 
Niko Resources Ltd. and OGX Petróleo e Gás Ltda., and our expectations regarding the probability of collection 
of amounts due to us from them, we recorded $22.5 million in bad debt expense 

Interest Expense.  Interest expense increased $37.2 million during 2014, compared to 2013, primarily due to 
incremental interest expense of $34.4 million, primarily related to the issuance of $1.0 billion in senior unsecured 
notes in November 2013 and a $13.6 million decrease in capitalized interest as a result of rig construction projects 
completed  in  2014,  partially  offset  by  reduced  interest  expense  related  to  $250.0  million  in  senior debt  that  we 
repaid  in  2014.    The  increase  in  interest  expense  was  also  partially  offset  by  the  reversal  of  $6.2  million  of 
expense  in  2014  associated  with  changes  in  uncertain  tax  positions  in  the  Brazil  and  Mexico  tax  jurisdictions, 
combined  with  the  absence  of  $5.9  million  of  interest  expense  recognized  in  the  prior  year    associated  with 
uncertain tax positions in the Mexico tax jurisdiction. 

Income Tax Expense. Our effective tax rate for 2014 was 24.9%, compared to a 29.1% effective tax rate for 
2013.  The lower effective tax rate in 2014 was due to differences in the mix of our domestic and international 
pre-tax earnings and losses, as well as the mix of international tax jurisdictions in which we operated.  The lower 
effective tax rate in the current period was also due to the reversal of $55.4 million of reserves for uncertain tax 
positions in various foreign jurisdictions which were settled in our favor or for which the statute of limitations had 
expired.  During 2013, our effective tax rate was negatively impacted by a provision of $56.9 million related to an 
uncertain tax position in Egypt, partially offset by the recognition of the impact of The American Taxpayer Relief 
Act of 2012, which reduced 2013 income tax expense by $27.5 million. 

Contract Drilling Revenue and Expense by Equipment Type 

2015 Compared to 2014 

Ultra-Deepwater  Floaters.    Revenue  generated  by  our  ultra-deepwater  floaters  increased  $351.5  million 
during 2015, compared to 2014, primarily as a result of 539 incremental revenue earning days ($247.6 million), 
combined  with  higher  average  daily  revenue  earned  ($103.9  million).    Total  revenue  earning  days  increased  in 
2015,  primarily  due  to  incremental  revenue  earning  days  for  our  newbuild  drillships  (621  additional  days),  the 
Ocean  Endeavor  offshore  Romania  (149  additional  days)  and  the  Ocean  Monarch  offshore  Australia  (105 
additional days), partially offset by fewer revenue earning days for our other ultra-deepwater floaters (336 fewer 
days), including the early termination of drilling contracts for the Ocean Baroness and Ocean Clipper.  Average 

35 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
daily  revenue  increased  in  2015,  compared  to  2014,  primarily  due  to  revenue  associated  with  the  operation  of 
three additional drillships in 2015 and the Ocean Endeavor, including higher amortized mobilization and contract 
preparation revenue, and a favorable dayrate adjustment for the Ocean Courage.   

Contract drilling expense for our ultra-deepwater floaters increased $83.5 million during 2015, compared to 
2014, reflecting incremental costs for our newbuild drillships ($153.4 million), partially offset by lower aggregate 
costs for our other ultra-deepwater floaters ($69.9 million).  The decrease in contract drilling expense in 2015 for 
our  other  ultra-deepwater  floaters  reflected  lower  costs  for  labor  and  personnel  ($42.6  million),  repairs  and 
maintenance ($11.5 million), rig mobilization and inspections ($2.3 million) and other rig operating costs ($13.5 
million). 

  Deepwater  Floaters.    Revenue  generated  by  our  deepwater  floaters  increased  $54.4  million  in  2015, 
compared  to  2014,  primarily  due  to  133  incremental  revenue  earning  days  ($54.5  million).    The  increase  in 
revenue  earning  days  during  2015  resulted  from  incremental  operating  days  for  four  of  our  deepwater  floaters 
after  prolonged  periods  of  nonproductive  time  for  planned  upgrades  and  surveys,  as  well  as  warm-stacking 
between contracts (501 incremental days), partially offset by fewer revenue earning days due to the cold stacking 
of  the  Ocean  Star  (233  days)  and  additional  non-revenue  earning  days  for  rig  mobilization  and  repairs  (135 
additional days).   

Contract drilling expense for our deepwater floaters decreased an aggregate $14.3 million in 2015, compared 
to  2014,  reflecting  lower  labor  and  personnel  related  costs  ($10.0  million),  repairs  and  maintenance  ($17.0 
million)  and  other  rig  operating  costs  ($7.5  million).    These  reductions  in  contract  drilling  expense  in  2015, 
compared to 2014, were partially offset by higher amortized rig mobilization expense ($20.2 million), primarily 
related to drilling rigs that returned to service in 2015.    

  Mid-Water  Floaters.    Revenue  generated  by  our  mid-water  floaters  decreased  $689.3  million  in  2015, 
compared  to  2014,  primarily  due  to  2,536  fewer  revenue  earning  days  ($688.1  million)  combined  with  lower 
average daily revenue earned ($1.2 million).  The reduction in revenue earning days during 2015 resulted from the 
cold stacking or retirement of twelve mid-water rigs (2,638 fewer days) and the idling of the Ocean Guardian and 
Ocean  Quest,  between  contracts  (288  fewer  days),  partially  offset  by  incremental  revenue  earning  days  for  the 
upgraded Ocean Patriot operating in the North Sea (296 additional days) and the Ocean Ambassador, which is 
expected to complete its contract offshore Mexico in the first quarter of 2016 (94 additional days). 

Contract  drilling  expense  for  our  mid-water  floaters  decreased  $304.5  million  in  2015,  compared  to  2015, 
primarily due to reduced operating costs for our idled, cold-stacked and retired mid-water rigs ($344.1 million), 
partially offset by incremental operating costs for the Ocean Patriot ($36.9 million). 

Jack-ups.    Contract  drilling  revenue  and  expense  for  our  jack-up  fleet  decreased  $93.6  million  and  $45.5 
million, respectively, during 2015, compared to 2014, primarily due to reduced utilization for five rigs that were 
under contract in 2014, but were cold stacked and marketed for sale at the end of 2015.  Contract drilling revenue 
for  2015  was  also  negatively  impacted  by  a  negotiated  dayrate  reduction  for  our  remaining  actively  marketed 
jack-up rig, the Ocean Scepter.    

2014 Compared to 2013 

Ultra-Deepwater  Floaters.    Revenue  generated  by  our  ultra-deepwater  floaters  increased  $133.1  million 
during 2014, compared to 2013, primarily due to higher average daily revenue earned ($219.0 million), partially 
offset  by  the  unfavorable  effect  of  241  fewer  revenue  earning  days  ($85.9  million).    Average  daily  revenue 
increased primarily due to several of our ultra-deepwater floaters earning higher dayrates during 2014, compared 
to  those  earned  in  2013,  as  well  as  incremental  amortization  of  $50.6  million  in  mobilization  and  contract 
preparation fees, including amounts recognized in connection with contracts for the Ocean Monarch in Indonesia 
($11.3  million),  the  Ocean  Endeavor  in  Romania  ($22.4  million)  and  the  Ocean  Clipper  in  Colombia  ($8.8 
million). Revenue earning days decreased during 2014, compared to 2013, primarily due to incremental downtime 
for  planned  inspections  and  shipyard  projects  (366  additional  days),  including  the  Ocean  Confidence  life-
extension  project,  non-revenue  earning  days  between  contracts  (241  additional  days)  and  rig  mobilizations  (95 
additional  days),  partially  offset  by  a  reduction  in  unscheduled  downtime  for  repairs  (273  fewer  days)  and  189 
revenue earning days for the Ocean BlackHawk, which was placed in service in 2014. 

Contract drilling expense for our ultra-deepwater fleet decreased $2.1 million in 2014, compared to 2013, as 
incremental operating costs for the Ocean BlackHawk ($44.8 million) were mostly offset by lower operating costs 

36 

 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
for the Ocean Confidence ($48.3 million) as a result of the rig’s life-extension project, which began in the second 
quarter of 2014.   

  Deepwater  Floaters.    Revenue  generated  by  our  deepwater  floaters  decreased  $122.8  million  during  2014 
compared to 2013, primarily due to 324 fewer revenue earning days ($130.6 million), partially offset by higher 
average daily revenue earned ($7.8 million), which reflected an increase in amortized mobilization and contract 
preparation  revenue  associated  with  the  Ocean  America’s  Australia  contract.    Revenue  earning  days  decreased 
primarily due to unplanned downtime attributable to  the warm stacking of rigs between contracts (533 additional 
days)  and  incremental  downtime  for  planned  surveys  and  shipyard  projects  (85  additional  days)  and  rig 
mobilizations (46 additional days), partially offset by 333 incremental revenue earning days for the Ocean Onyx 
during 2014.   

Contract drilling expense incurred by our deepwater floaters increased $24.2 million during 2014, compared 
to 2013, primarily due to incremental operating costs for the Ocean Onyx ($31.5 million), costs associated with a 
five-year  survey  for  the  Ocean  Alliance  ($18.2  million)  and  the  mobilization  of  the  Ocean  Star  to  the  GOM, 
where it is currently cold stacked ($8.8 million).  The increase in contract drilling expense in 2014 was partially 
offset  by  a  reduction  in  costs  for  international  shorebase  locations  ($9.7  million),  labor  and  personnel  ($6.0 
million), repairs and maintenance ($9.2 million), inspections ($4.0 million), agency fees ($1.8 million), and other 
rig-related costs ($3.5 million), primarily as a result of lower rig utilization compared to 2013.  

  Mid-Water  Floaters.    Revenue  generated  by  our  mid-water  floaters  decreased  $121.1  million  during  2014, 
compared  to  2013,  primarily  as  a  result  of  217  fewer  revenue  earning  days  ($62.2  million)  and  lower  average 
daily revenue earned ($58.9 million).  The decline in revenue earning days for 2014 reflected a 652-day increase 
in  unplanned  downtime,  primarily  due  to  the  cold  stacking  of  rigs,  unpaid  equipment  repairs  and  downtime 
between  contracts,  partially  offset  by  a  435-day  reduction  in  planned  downtime  for  shipyard  projects  and 
regulatory inspections.  Average daily revenue earned during 2014 decreased, compared to 2013, primarily due to 
lower amortized mobilization and contract preparation revenue ($35.9 million) and a significantly lower dayrate 
earned by the Ocean Quest operating in Vietnam, partially offset by higher dayrates earned by our rigs operating 
in the North Sea during 2014. 

Contract  drilling  expense  for  our  mid-water  fleet  decreased  $69.4  million  during  2014,  compared  to  2013, 
primarily due to reduced costs for cold stacked rigs and retired rigs ($46.3 million) and the Ocean Patriot, which 
was out of service until the fourth quarter of 2014 for an enhancement project and contract preparation activities 
($9.6 million).  In addition, contract drilling expense incurred by our actively-marketed mid-water fleet in 2014, 
compared to 2013, reflected lower aggregate costs for shipyard projects and regulatory inspections ($24.4 million) 
and mobilization of rigs ($14.5 million), partially offset by higher labor and personnel costs ($23.4 million). 

Jack-ups.    Contract  drilling  revenue  for  our  jack-up  fleet  increased  $4.4  million  during  2014,  compared  to 
2013, primarily due to an increase in average daily revenue earned ($13.7 million), as a result of higher dayrates 
earned by several of our jack-up rigs during 2014, partially offset by 104 fewer revenue earning days compared to 
2013 ($9.3 million).  Contract drilling expense decreased $3.9 million in 2014, compared to 2013, primarily due 
to  lower  costs associated  the mobilization  of  rigs ($6.6  million), partially  offset  by  higher  labor  and  personnel-
related costs ($3.4 million).  

Liquidity and Capital Resources 

We have historically relied principally on our cash flows from operations and cash reserves to meet liquidity 
needs and fund our cash requirements.  However, in 2015, we also utilized short-term borrowings under our $1.5 
billion  syndicated  revolving  credit  agreement,  or  Credit  Agreement,  and  issued  commercial  paper  under  our 
commercial paper program to meet our short-term liquidity needs.  At February 16, 2016, we had $305.0 million 
in Eurodollar loans outstanding under the Credit Agreement[, which will mature on February 29, 2016].  See “ – 
Credit Agreement, Commercial Paper Program and Senior Notes.”   

Based on our cash available for current operations and contractual backlog of $5.2 billion, as of February 8, 
2016, of which $1.6 billion is expected to be realized in 2016, we believe future capital spending, including the 
final installment due on the Ocean GreatWhite and debt service requirements, will be funded from our cash and 
cash equivalents, future operating cash flows and borrowings under our Credit Agreement and/or the issuance of 
commercial  paper.    See  “–  Cash  Flow  and  Capital  Expenditures  –  Contractual  Cash  Obligations  –  Rig 
Construction” and “Risk Factors (cid:16) We can provide no assurance that our drilling contracts will not be terminated 
early or that our current backlog of contract drilling revenue will be ultimately realized.” 

37 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Certain  of  our  international  rigs  are  owned  and  operated,  directly  or  indirectly,  by  Diamond  Foreign  Asset 
Company, or DFAC, and, as a result of our intention to indefinitely reinvest the earnings of DFAC and its foreign 
subsidiaries to finance our foreign activities, we do not expect such earnings to be available for distribution to our 
stockholders or to finance our domestic activities.  See “ – Market Overview – Critical Accounting Estimates – 
Income  Taxes.”    To  the  extent  available,  we  expect  to  utilize  the  operating  cash  flows  generated  by  and  cash 
reserves of DFAC and the operating cash flows available to and cash reserves of Diamond Offshore Drilling, Inc., 
or DODI, to meet each entity’s respective working capital requirements and capital commitments.   

At December 31, 2015, 2014 and 2013, we had cash available for current operations, including cash reserves 

of DFAC, as follows: 

  Cash and equivalents ...................................................  
  Marketable securities ...................................................  
Total cash available for current operations ............  

  $ 

 119,028  
11,518 
$  130,546 

2015 

December 31, 
2014 
(In thousands) 
 233,623  
16,033 
  $  249,656 

$ 

2013 

$ 
 347,011  
  1,750,053 
$  2,097,064 

A substantial portion of our cash flows has been invested in the enhancement of our drilling fleet, including 
$3.8 billion since 2013 for the construction of five newbuild rigs, the major upgrade of two semisubmersible rigs 
and  other  capital  enhancement  projects.    We  determine  the  amount  of  cash  required  to  meet  our  capital 
commitments by evaluating our rig construction obligations, the need to upgrade rigs to meet specific customer 
requirements  and  our  ongoing  rig  equipment  enhancement/replacement  programs.    We  also  make  periodic 
assessments  of  our  capital  spending  programs  based  on  current  and  expected  industry  conditions  and  make 
adjustments thereto if required.  See “– Cash Flow and Capital Expenditures – Contractual Cash Obligations – Rig 
Construction.”  We  pay  dividends  at  the  discretion  of  our  Board  of  Directors,  or  Board.    During  the  three-year 
period ended December 31, 2015, we paid regular and special cash dividends totaling $206.9 million and $829.9 
million,  respectively.    Our  Board  has  adopted  a  policy  of  considering  paying  cash  dividends,  in  amounts  to  be 
determined, on a quarterly basis.  Any determination to declare a dividend, as well as the amount of any dividend 
that  may  be  declared,  will  be  based  on  the  Board’s  consideration  of  our  financial  position,  earnings,  earnings 
outlook,  capital  spending  plans,  outlook  on  current  and  future  market  conditions  and  business  needs  and  other 
factors that our Board of Directors considers relevant at that time.  Our dividend policy may change from time to 
time, and there can be no assurance that we will continue to declare any cash dividends at all or in any particular 
amounts.  

On  February  8,  2016,  we  announced  that  we  were  discontinuing  our  quarterly  regular  cash  dividend.    See 
“Risk  Factors  –  Although  we  have  paid  cash  dividends  in  the  past,  we  may  not  pay  regular  or  special  cash 
dividends  in  the  future  and  we  can  give  no  assurance  as  to  the  amount  or  timing  of  the  payment  of  any  future 
regular or special cash dividends” in Item 1A of this report, which is incorporated herein by reference. 

Depending  on market  conditions,  we  may,  from  time  to  time,  purchase  shares of our  common  stock in  the 
open market or otherwise.  During 2014, we repurchased 1,895,561 shares of our outstanding common stock at a 
cost of $87.8 million.  In addition, Loews has informed us that, depending on market and other conditions, it may, 
from time to time, purchase shares of our common stock in the open market or otherwise.  During the years ended 
December 31, 2015, 2014 and 2013, Loews purchased 1,134,827, 1,879,600 and 0, shares of our common stock, 
respectively.   

    During the three-year period ended December 31, 2015, our primary source of cash was an aggregate $2.8 
billion  generated  from  operating  activities,  $1.1  billion  net  proceeds  from  the  sale  or  maturity  of  marketable 
securities in 2014 and 2013, net of purchases, $987.8 million net proceeds from the issuance of senior notes in 
2013, $286.6 million net proceeds/repayments from the issuance of commercial paper in 2015 and an aggregate 
$25.7  million  from  the  sale  of  12  drilling  rigs  during  2015  and  2014.    Cash  usage  during  the  same  period  was 
primarily  for  capital  expenditures ($3.8 billion), payment  of dividends  and  anti-dilution  payments  to  stock plan 
participants ($1.0 billion), long-term debt maturities ($250.0 million in each of 2015 and 2014) and the acquisition 
of treasury stock ($87.8 million) in 2014. 

  We  may,  from  time  to  time,  issue  debt  or  equity  securities,  or  a  combination  thereof,  to  finance  capital 
expenditures, the acquisition of assets and businesses or for general corporate purposes.  Our ability to access the 

38 

 
 
 
 
 
 
 
   
   
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
capital  markets  by  issuing  debt  or  equity  securities  will  be  dependent  on  our  results  of  operations,  our  current 
financial condition, current credit ratings, current market conditions and other factors beyond our control. 

Cash Flow and Capital Expenditures 

Our cash flow from operations and capital expenditures for each of the years in the three-year period ended 

December 31, 2015 were as follows: 

  Cash flow from operations ...........................................  

   $ 

736,427      $ 

  $  1,065,988 

2015 

Year Ended December 31, 
2014 
(In thousands) 
992,831   

2013 

  Capital expenditures: 
  Drillship construction ...............................................  
  Major upgrade of deepwater floaters ........................  
  Construction of ultra-deepwater floater ....................  
  Ocean Patriot enhancement program .......................  
  Ocean Confidence service-life-extension project .....  
  Rig equipment and replacement program .................  
Total capital expenditures .....................................  

  $   454,093 
  34,723 
  55,805 
  2,669 
  72,124 
          211,241 
830,655 
  $ 

  $   1,318,271 
  168,045 
  18,223 
          107,181 
          134,871 
          286,173 
   $  2,032,764 

  $  

  $ 

   130,268 
  396,584 
  195,578 
  29,948 
  -- 
   205,220 
957,598 

Cash  Flow.    Cash  flow  from  operations  decreased  approximately  $256.4  million  during  2015,  compared  to 
2014,  primarily  due  to  lower  cash  receipts  from  contract  drilling  services  ($444.8  million),  partially  offset  by  a 
$144.4  million  net  decrease  in  cash  payments  for  contract  drilling  and  general  and  administrative  expenses, 
including personnel-related, maintenance, mobilization and other rig operating costs and lower income taxes paid, 
net  of  refunds  ($44.0  million).    The  decline  in  cash  receipts  from  and  cash payments  related  to  contract  drilling 
services both reflect an aggregate decline in our contract drilling operations, as well as our efforts to control costs.   

Cash flow from operations decreased approximately $73.2 million during 2014, compared to 2013, primarily 
due to higher cash payments for contract drilling expenses ($77.0 million) and higher interest paid on our senior 
notes ($50.8 million) related to interest paid on $1.0 billion in debt issued in November 2013 and an early interest 
payment  for  our  4.875%  senior  notes  due  July  1,  2015.    The  increase  in  cash  outflows  for  2014  was  partially 
offset  by  lower  income  taxes  paid,  in  the  U.S.  federal  jurisdiction,  net  of  refunds,  and  a  slight  increase  in  cash 
receipts from contract drilling services ($6.5 million).  

See “--Results of Operations--Years Ended December 31, 2015, 2014 and 2013.” 

Capital  Expenditures.    As  of  the  date  of  this  report,  we  expect  capital  expenditures  for  2016  to  aggregate 
approximately  $675.0  million,  of  which  we  expect  to  spend  approximately  $525.0  million  to  complete 
construction of the Ocean GreatWhite and an estimated $150.0 million for our ongoing capital maintenance and 
replacement programs.  See “ -- Contractual Cash Obligations -- Rig Construction.”   We expect to fund our 2016 
capital spending from the operating cash flows generated by and cash reserves of DFAC and the operating cash 
flows available to and cash reserves of DODI, as well as borrowings under our Credit Agreement or issuance of 
commercial paper. 

Contractual Cash Obligations - Rig Construction.  As of the date of this report, we have one rig, the Ocean 
GreatWhite, under construction in Ulsan, South Korea, for which we are obligated under a construction agreement 
with Hyundai Heavy Industries Co., Ltd. Construction of the Ocean GreatWhite continues with delivery expected 
in  mid-2016.    The  estimated  total  project  cost,  including  shipyard  costs,  capital  spares,  commissioning,  project 
management  and  shipyard  supervision,  but  excluding  capitalized  interest,  is  $764.0  million,  of  which  $241.5 
million  has  been  incurred  as  of  December  31,  2015.    See  Note  12  “Commitments  and  Contingencies”  to  our 
Consolidated Financial Statements included in Item 8 of this report for more information about this project. 

We had no other purchase obligations for major rig upgrades or any other significant obligations at December 
31, 2015, except for those related to our direct rig operations, which arise during the normal course of business.        

Credit Agreement, Commercial Paper Program and Senior Notes  

Our Credit Agreement provides for a $1.5 billion senior unsecured revolving credit facility for general corporate 

39 

 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
      
      
       
       
       
       
       
       
       
       
      
   
 
 
   
 
 
   
 
 
  
 
 
 
 
 
purposes maturing on October 22, 2020, except for $40 million of commitments that mature on March 17, 2019 and 
$60 million of commitments that mature on October 22, 2019.  As of December 31, 2015, there were no loans or 
letters of credit outstanding under the Credit Agreement, and we were in compliance with all covenant requirements 
under the Credit Agreement.   

Our Credit Agreement also provides liquidity for our payment obligations in respect of notes issued under our 
commercial paper program.  Under our commercial paper program, we may issue, on a private placement basis, 
unsecured  commercial  paper  notes  up  to  a  maximum  aggregate  amount  outstanding  at  any  time  of  $1.5 
billion,and, unless we change the terms of the program, the aggregate amount of commercial paper notes and total 
loans and letters of credit outstanding under the Credit Agreement at any time will not exceed $1.5 billion.  At 
December 31, 2015, we had $286.6 million in commercial paper notes outstanding with a weighted average interest 
rate of 0.86% and a weighted average remaining term of 5.8 days that were repaid in January 2016.  As of February 
16, 2016, we had no commercial paper notes outstanding.   

During  February  2016,  we  borrowed  $305.0  million  in  Eurodollar  loans  under  our  Credit  Agreement,  which 
bear interest at 1.565% and mature on February 29, 2016.  As of February 16, 2016, we had an additional $1.2 billion 
available under the Credit Agreement. 

As of December 31, 2015, we had an aggregate $2.0 billion in long-term, unsecured senior notes outstanding, of 

which $500.0 million will mature in 2019 and the remainder will mature at various times beginning in 2023. 

See Note 10 “Credit Agreement and Senior Notes” to our Consolidated Financial Statements in Item 8 of this 

report. 

Credit Ratings. In January 2016, Moody’s Investor Services announced that it would be reviewing our long-
term  corporate  credit  and  unsecured  debt  rating  and  short-term  credit  rating  for  commercial  paper,  which  are 
currently Baa2 and Prime-2, respectively, for possible downgrade.  Our current corporate credit rating is BBB+ 
and  our  short-term  credit  rating  is  A2  for  Standard  &  Poor's  Ratings  Services.      Market  conditions  and  other 
factors, many of which are outside of our control, could cause our credit ratings to be lowered.  A downgrade in 
our credit ratings could adversely impact our cost of issuing additional debt and the amount of additional debt that 
we could issue, and could restrict our access to our commercial paper program and capital markets and our ability 
to raise additional debt or rollover existing maturities.  As a consequence, we may not be able to issue additional 
debt in amounts and/or with terms that we consider to be reasonable. One or more of these occurrences could limit 
our ability to pursue other business opportunities.   

Contractual Cash Obligations  

The following table sets forth our contractual cash obligations at December 31, 2015. 

Payments Due By Period 

Contractual Obligations(1)  

Total 

Less than 
1 year 

Long-term debt (principal and interest) .......... $ 3,879,563 
439,962 
Construction contract  ....................................
Operating leases .............................................           4,565 
Total obligations ............................................. $ 4,324,090 

$    103,063 
      439,962 
          2,673 
$    545,698 

1 – 3 years 
(In thousands) 
  $  206,125 
               -- 

1,705 
  $  207,830 

4 – 5 years 

After 5 
years 

$  662,063 
               -- 
103 
$  662,166 

$ 2,908,312 
                -- 
               84 
$ 2,908,396 

(1)  The above table excludes $49.4 million of unrecognized tax benefits related to uncertain tax positions as 
of  December  31,  2015  and  an  additional  $39.9  million  and  $2.7  million  for  potential  penalties  and 
interest,  respectively,  related  to  such  uncertain  tax  positions.    Due  to  the  high  degree  of  uncertainty 
regarding the timing of future cash outflows associated with the liabilities recognized in these balances, 
we are unable to make reasonably reliable estimates of the period of cash settlement with the respective 
taxing authorities. 

Except for the construction contracts discussed above and referred to in the preceding table, we had no other 
purchase obligations for major rig upgrades or any other significant obligations at December 31, 2015, except for 
those related to our direct rig operations, which arise during the normal course of business.   

40 

   
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
In February 2016, we entered into a ten-year agreement with GE Oil & Gas, or GE, to provide services with 
respect  to  certain  blowout  preventer  and  related  well  control  equipment  on  our  four  newbuild  drillships.   Such 
services  include  management  of  maintenance,  certification  and  reliability  with  respect  to  such  equipment.   In 
connection  with  the  services  agreement  with  GE,  we  will  sell  the  equipment  to  a  GE  affiliate  for  an  aggregate 
$210.0 million and will lease back such equipment over separate ten-year operating leases.  We do not expect to 
realize any gain or loss on these sale and leaseback transactions.  Future commitments for the full term under the 
services agreement and leases are estimated to aggregate approximately $650.0 million.   

Other Commercial Commitments - Letters of Credit 

We  were  contingently  liable  as  of  December  31,  2015  in  the  amount  of  $71.6  million  under  certain 
performance, supersedeas, bid, tax and customs bonds and letters of credit.  Agreements relating to approximately 
$64.0 million of performance, tax, supersedeas, court and customs bonds can require collateral at any time.  As of 
December 31, 2015, we had not been required to make any collateral deposits with respect to these agreements.  
The remaining agreements cannot require collateral except in events of default.  Banks have issued letters of credit 
on our behalf securing certain of these bonds.  The table below provides a list of these obligations in U.S. dollar 
equivalents and their time to expiration. 

Total 

For the Years Ending December 31, 
2018 
2017 

2016 

(In thousands) 

Other Commercial Commitments 
  Performance bonds  ......................... $ 
  Supersedeas bond ............................
  Bid bonds 
 .....................................
  Tax bond 
  Other ................................................
Total obligations ................................. $ 

51,357    $ 
9,189     

2,470     

5,865     

6,122 
9,189 

2,470 

5,865 

2,669     
71,550    $ 

2,345 
25,991 

  $ 

26,110    $ 
--     

19,125 
-- 

--     

--     

--     

  $ 

26,110    $ 

-- 

-- 

324 
19,449 

Off-Balance Sheet Arrangements 

At December 31, 2015 and 2014, we had no off-balance sheet debt or other off-balance sheet arrangements. 

Other 

Currency  Risk.    Some  of our  subsidiaries  conduct  a  portion of  their operations  in  the  local  currency  of  the 
country where they conduct operations.  Currency environments in which we have significant business operations 
include Brazil, the U.K., Australia and Mexico.  We may, if possible, attempt to minimize our currency exchange 
risk by seeking international contracts payable to us in local currency in amounts equal to our estimated operating 
costs  payable  in  local  currency,  with  the  balance  of  the  contract  payable  in  U.S.  dollars.    At  present,  however, 
only a limited number of our contracts are payable both in U.S. dollars and the local currency.   

Historically,  to  the  extent  that  we  have  not  been  able  to  cover  our  local  currency  operating  costs  with 
customer payments in the local currency, we have also utilized foreign currency forward exchange, or FOREX, 
contracts to reduce our currency exchange risk.  We currently have no outstanding FOREX contracts. 

  We  record  currency  transaction  gains  and  losses  as  “Foreign  currency  transaction  gain  (loss)”  in  our 
Consolidated Statements of Operations.  Gains and losses arising from the settlement of our FOREX contracts that 
have  been  designated  as  cash  flow  hedges  are  reported  as  a  component  of  “Contract  drilling,  excluding 
depreciation” expense in our Consolidated Statements of Operations. 

Forward-Looking Statements 

We or our representatives may, from time to time, either in this report, in periodic press releases or otherwise, 
make or incorporate by reference certain written or oral statements that are “forward-looking statements” within 
the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of 
the Securities Exchange Act of 1934, as amended, or the Exchange Act.  All statements other than statements of 
historical  fact  are,  or  may  be  deemed  to  be,  forward-looking  statements.    Forward-looking  statements  include, 
without  limitation,  any  statement  that  may  project,  indicate  or  imply  future  results,  events,  performance  or 

41 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
 
   
   
   
   
 
achievements, and may contain or be identified by the words “expect,” “intend,” “plan,” “predict,” “anticipate,” 
“estimate,” “believe,” “should,” “could,” “may,” “might,” “will,” “will be,” “will continue,” “will likely result,” 
“project,”  “forecast,”  “budget”  and  similar  expressions.    In  addition,  any  statement  concerning  future  financial 
performance (including, without limitation, future revenues, earnings or growth rates), ongoing business strategies 
or  prospects,  and  possible  actions  taken  by  or  against  us,  which  may  be  provided  by  management,  are  also 
forward-looking  statements  as  so  defined.    Statements  made  by  us  in  this  report  that  contain  forward-looking 
statements may include, but are not limited to, information concerning our possible or assumed future results of 
operations and statements about the following subjects: 

(cid:120)  market conditions and the effect of such conditions on our future results of operations;  
(cid:120) 
sources and uses of and requirements for financial resources and sources of liquidity; 
(cid:120) 
interest rate and foreign exchange risk; 
(cid:120) 
contractual obligations and future contract negotiations; 
(cid:120) 
operations outside the United States; 
(cid:120) 
business strategy; 
(cid:120) 
growth opportunities; 
(cid:120) 
competitive position, including without limitation, competitive rigs entering the market; 
(cid:120) 
expected financial position; 
(cid:120) 
cash flows and contract backlog; 
(cid:120) 
declaration and payment of regular or special dividends; 
(cid:120) 
financing plans; 
(cid:120)  market outlook; 
(cid:120) 
tax planning; 
(cid:120) 
debt levels and the impact of changes in the credit markets and credit ratings for our debt; 
(cid:120) 
budgets for capital and other expenditures; 
(cid:120) 
timing and duration of required regulatory inspections for our drilling rigs; 
(cid:120) 
timing and cost of completion of rig upgrades, construction projects and other capital projects; 
(cid:120) 
delivery  dates  and  drilling  contracts  related  to  rig  conversion  or  upgrade  projects,  construction 
projects, other capital projects or rig acquisitions; 
plans and objectives of management; 
idling drilling rigs or reactivating stacked rigs; 
scrapping retired rigs; 
assets held for sale; 
asset impairments and impairment evaluations; 
effective date and performance of contracts; 
outcomes of legal proceedings; 
purchases of our securities; 
compliance with applicable laws; and 
availability, limits and adequacy of insurance or indemnification. 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

These types of statements are based on current expectations about future events and inherently are subject to a 
variety  of  assumptions,  risks  and  uncertainties,  many  of  which  are  beyond  our  control,  that  could  cause  actual 
results to differ materially from those expected, projected or expressed in forward-looking statements.  These risks 
and uncertainties include, among others, the following: 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

those described under “Risk Factors” in Item 1A; 
general economic and business conditions; 
worldwide supply and demand for oil and natural gas; 
changes in foreign and domestic oil and gas exploration, development and production activity; 
oil and natural gas price fluctuations and related market expectations; 
the  ability  of  the  Organization  of  Petroleum  Exporting  Countries,  or  OPEC,  to  set  and  maintain 
production levels and pricing, and the level of production in non-OPEC countries; 
policies of various governments regarding exploration and development of oil and gas reserves; 
inability to obtain contracts for our rigs that do not have contracts; 
the cancellation of contracts included in our reported contract backlog; 
advances in exploration and development technology; 
the worldwide political and military environment, including, for example, in oil-producing regions 
and locations where our rigs are operating or where we have rigs under construction; 

42 

 
 
 
 
 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

casualty losses; 
operating hazards inherent in drilling for oil and gas offshore; 
the risk that future regular and special dividends may not be declared or paid; 
the risk of physical damage to rigs and equipment caused by named windstorms in the U.S. Gulf of 
Mexico; 
industry fleet capacity; 

(cid:120) 
(cid:120)  market  conditions  in  the  offshore  contract  drilling  industry,  including,  without  limitation,  dayrates 

and utilization levels; 
competition; 
changes in foreign, political, social and economic conditions; 
risks  of  international  operations,  compliance  with  foreign  laws  and  taxation  policies  and  seizure,  
expropriation,  nationalization,  deprivation,  malicious  damage  or  other  loss  of  possession  or  use  of 
equipment and assets; 
risks of potential contractual liabilities pursuant to our various drilling contracts in effect from time 
to time; 
customer or supplier bankruptcy, liquidation or other financial difficulties; 
the ability of customers and suppliers to meet their obligations to us and our subsidiaries; 
collection of receivables; 
the risk that a letter of intent may not result in a definitive agreement; 
foreign exchange and currency fluctuations and regulations, and the inability to repatriate income or 
capital; 
risks of war, military operations, other armed hostilities, terrorist acts and embargoes; 
changes in offshore drilling technology, which could require significant capital expenditures in order 
to maintain competitiveness; 
regulatory  initiatives  and  compliance  with  governmental  regulations  including,  without  limitation, 
regulations pertaining to climate change, greenhouse gases, carbon emissions or energy use; 
compliance with and liability under environmental laws and regulations; 
potential changes in accounting policies by the Financial Accounting Standards Board, the Securities 
and Exchange Commission, or SEC, or regulatory agencies for our industry which may cause us to 
revise  our  financial  accounting  and/or  disclosures  in  the  future,  and  which  may  change  the  way 
analysts measure our business or financial performance; 
development and exploitation of alternative fuels; 
customer preferences; 
effects of litigation, tax audits and contingencies and the impact of compliance with judicial rulings 
and jury verdicts; 
cost, availability, limits and adequacy of insurance; 
invalidity of assumptions used in the design of our controls and procedures; 
the results of financing efforts; 
adequacy and availability of our sources of liquidity;  
risks resulting from our indebtedness; 
public health threats; 
negative publicity; 
impairments of assets; 
the availability of qualified personnel to operate and service our drilling rigs; and 
various other matters, many of which are beyond our control.   

(cid:120) 
(cid:120) 
(cid:120) 

(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 

(cid:120) 

(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

The  risks  and  uncertainties  included  here  are  not  exhaustive.    Other  sections  of  this  report  and  our  other 
filings with the SEC include additional factors that could adversely affect our business, results of operations and 
financial performance.  Given these risks and uncertainties, investors should not place undue reliance on forward-
looking statements.  Forward-looking statements included in this report speak only as of the date of this report.  
We expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any forward-
looking statement to reflect any change in our expectations or beliefs with regard to the statement or any change 
in events, conditions or circumstances on which any forward-looking statement is based.  In addition, in certain 
places  in  this  report,  we  may  refer  to  reports  published  by  third  parties  that  purport  to  describe  trends  or 
developments  in  energy  production  or  drilling  and  exploration  activity.  We  do  so  for  the  convenience  of  our 
investors and potential investors and in an effort to provide information available in the market intended to lead to 
a better understanding of the market environment in which we operate. We specifically disclaim any responsibility 
for the accuracy and completeness of such information and undertake no obligation to update such information. 

43 

 
 
 
New Accounting Pronouncements 

For  a  discussion  of  recent  accounting  pronouncements,  which  are  not  yet  effective,  and  their  effect  on  our 
financial  position,  results  of  operations  and  cash  flows,  see  Note  1  “General  Information  -  Recent  Accounting 
Pronouncements” to our Consolidated Financial Statements in Item 8 of this report. 

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk. 

The  information  included  in  this  Item  7A  is  considered  to  constitute  “forward-looking  statements”  for 
purposes  of  the  statutory  safe  harbor  provided  in  Section  27A  of  the  Securities  Act  and  Section  21E  of  the 
Exchange Act.  See “Management’s Discussion and Analysis of Financial Condition and Results of Operations – 
Forward-Looking Statements” in Item 7 of this report. 

Our  measure  of  market  risk  exposure  represents  an  estimate  of  the  change  in  fair  value  of  our  financial 
instruments. Market risk exposure is presented for each class of financial instrument held by us at December 31, 
2015 and 2014, assuming immediate adverse market movements of the magnitude described below. We believe 
that the various rates of adverse market movements represent a measure of exposure to loss under hypothetically 
assumed  adverse  conditions.  The  estimated  market  risk  exposure  represents  the  hypothetical  loss  to  future 
earnings  and  does  not  represent  the  maximum  possible  loss  or  any  expected  actual  loss,  even  under  adverse 
conditions, because actual adverse fluctuations would likely differ. In addition, since our investment portfolio is 
subject  to  change based  on our  portfolio management  strategy  as  well  as  in  response  to  changes  in  the  market, 
these estimates are not necessarily indicative of the actual results that may occur. 

Exposure to market risk is managed and monitored by our senior management. Senior management approves 
the overall investment strategy that we employ and has responsibility to ensure that the investment positions are 
consistent  with  that  strategy  and  the  level  of  risk  acceptable  to  us.  We  may  manage  risk  by  buying  or  selling 
instruments or entering into offsetting positions. 

Interest Rate Risk 

We  have  exposure  to  interest  rate  risk  arising  from  changes  in  the  level  or  volatility  of  interest  rates.  Our 
investments  in  marketable  securities  are  primarily  in  fixed  maturity  securities.  We  monitor  our  sensitivity  to 
interest rate risk by evaluating the change in the value of our financial assets and liabilities due to fluctuations in 
interest  rates.  The  evaluation  is  performed  by  applying  an  instantaneous  change  in  interest  rates  by  varying 
magnitudes on a static balance sheet to determine the effect such a change in rates would have on the recorded 
market  value  of  our  investments  and  the  resulting  effect  on  stockholders’  equity.  The  analysis  presents  the 
sensitivity of the market value of our financial instruments to selected changes in market rates and prices which 
we believe are reasonably possible over a one-year period. 

The sensitivity analysis estimates the change in the market value of our interest sensitive assets and liabilities 
that were held on December 31, 2015 and 2014, due to instantaneous parallel shifts in the yield curve of 100 basis 
points, with all other variables held constant. 

The  interest  rates  on  certain  types  of  assets  and  liabilities  may  fluctuate  in  advance  of  changes  in  market 
interest rates, while interest rates on other types may lag behind changes in market rates. Accordingly, the analysis 
may  not  be  indicative  of,  is  not  intended  to  provide,  and  does  not  provide  a  precise  forecast  of  the  effect  of 
changes  in  market  interest  rates  on  our  earnings  or  stockholders’  equity.  Further,  the  computations  do  not 
contemplate any actions we could undertake in response to changes in interest rates. 

Our long-term debt, as of December 31, 2015 and 2014, is denominated in U.S. dollars. Our existing debt has 
been issued at fixed rates, and as such, interest expense would not be impacted by interest rate shifts.  The impact 
of  a  100-basis  point  increase  in  interest  rates  on  fixed  rate  debt  would  result  in  a  decrease  in  market  value  of 
$112.7 million and $176.8 million as of December 31, 2015 and 2014, respectively.  A 100-basis point decrease 
would result in an increase in market value of $131.3 million and $210.6 million as of December 31, 2015 and 
2014, respectively. 

Foreign Exchange Risk  

Foreign  exchange  rate  risk  arises  from  the  possibility  that  changes  in  foreign  currency  exchange  rates  will 

44 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
impact  the  value  of  financial  instruments.    It  is  customary  for  us  to  enter  into  FOREX  contracts  in  the  normal 
course of business.  These contracts generally require us to net settle the spread between the contracted foreign 
currency exchange rate and the spot rate on the contract settlement date, which for most of our contracts is the 
average spot rate for the contract period.  As of December 31, 2015, we had no FOREX contracts outstanding.  At 
December 31, 2014, we have presented the fair value of our outstanding FOREX contracts as a current liability of 
$(5.4) million in “Accrued liabilities” in our Consolidated Balance Sheets included in Item 8 of this report.   

The  following  table  presents  our  exposure  to  market  risk  by  category  (interest  rates  and  foreign  currency 

exchange rates): 

Fair Value Asset (Liability) 
December 31, 

2015 

2014 

Market Risk 
December 31, 

2015 

2014 

(In thousands) 

Interest rate:  
  Marketable securities ...................    $      11,500   (a)   $ 

16,000  (a)  

  $ 

(300)  (b)   $ 

(600)  (b) 

Foreign Exchange:  
  Forward exchange contracts – 

liability positions ..........................      

--   

(5,400) (c) 

                  --  

(12,100) (d) 

(a)    The  fair  market  value  of  our  investment  in  marketable  securities,  excluding  repurchase  agreements,  is 

based on the quoted closing market prices on December 31, 2015 and 2014.  

(b)  The calculation of estimated market risk exposure is based on assumed adverse changes in the underlying 
reference  price  or  index  of  an  increase  in  interest  rates  of  100  basis  points  at  December  31,  2015  and 
2014. 

(c)  The fair value of our foreign currency forward exchange contracts is based on both quoted market prices 

and valuations derived from pricing models on December 31, 2014.  

(d)  The calculation of estimated foreign exchange risk assumes an instantaneous 20% decrease in the foreign 
currency  exchange  rates  versus  the  U.S.  dollar  from  their  values  at  December  31,  2014,  with  all  other 
variables held constant.  

45 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
Item 8.  Financial Statements and Supplementary Data. 

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

To the Board of Directors and Stockholders of 
Diamond Offshore Drilling, Inc. and Subsidiaries 
Houston, Texas 

We  have  audited  the  accompanying  consolidated  balance  sheets  of  Diamond  Offshore  Drilling,  Inc.  and 
subsidiaries  (the  "Company")  as  of  December  31,  2015  and  2014,  and  the  related  consolidated  statements  of 
income,  comprehensive  income,  stockholders'  equity,  and  cash  flows  for  each  of  the  three  years  in  the  period 
ended December 31, 2015. These financial statements are the responsibility of the Company's management. Our 
responsibility is to express an opinion on the financial statements based on our audits. 

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board 
(United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about 
whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, 
evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the 
accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as  evaluating  the  overall 
financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. 

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position 
of  Diamond  Offshore  Drilling,  Inc.  and  subsidiaries  at  December  31,  2015  and  2014,  and  the  results  of  their 
operations and their cash flows for each of the three years in the period ended December 31, 2015, in conformity 
with accounting principles generally accepted in the United States of America.  

We  have  also  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board 
(United States), the Company's internal control over financial reporting as of December 31, 2015, based on the 
criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring 
Organizations  of  the  Treadway  Commission  and  our  report  dated  February  19,  2016  expressed  an  unqualified 
opinion on the Company's internal control over financial reporting.  

/s/ Deloitte & Touche LLP 

Houston, Texas 
February 19, 2016 

46 

 
 
 
 
 
 
 
 
 
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

To the Board of Directors and Stockholders of  Diamond 
Offshore Drilling, Inc. and Subsidiaries  Houston, Texas 

We have audited the internal control over financial reporting of Diamond Offshore Drilling, Inc. and subsidiaries 
(the  "Company")  as  of  December  31,  2015,  based  on  criteria  established  in  Internal  Control  —  Integrated 
Framework  (2013)  issued  by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission.  The 
Company's management is responsible for maintaining effective internal control over financial reporting and for 
its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Item 
9A of this Form 10-K  under the heading “Management’s Annual Report on Internal Control Over Financial 
Reporting.” Our responsibility is to express an opinion on the Company's internal control over financial reporting 
based on our audit. 

We  conducted  our  audit  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board 
(United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about 
whether  effective  internal  control  over  financial  reporting  was  maintained  in  all  material  respects.  Our  audit 
included obtaining an understanding of internal control over financial reporting, assessing the risk that a material 
weakness  exists,  testing  and  evaluating  the  design  and  operating  effectiveness  of  internal  control  based  on  the 
assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe 
that our audit provides a reasonable basis for our opinion. 

A company's internal control over financial reporting is a process designed by, or under the supervision of, the 
company's  principal  executive  and  principal  financial  officers,  or  persons  performing  similar  functions,  and 
effected by the company's board of directors, management, and other personnel to provide reasonable assurance 
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in 
accordance with generally accepted accounting principles. A company's internal control over financial reporting 
includes  those  policies  and  procedures  that  (1)  pertain  to  the  maintenance  of  records  that,  in  reasonable  detail, 
accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable 
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance 
with generally accepted accounting principles, and that receipts and expenditures of the company are being made 
only in accordance with authorizations of management and directors of the company; and (3) provide reasonable 
assurance  regarding  prevention  or  timely  detection  of  unauthorized  acquisition,  use,  or  disposition  of  the 
company's assets that could have a material effect on the financial statements. 

Because  of  the  inherent  limitations  of  internal  control  over  financial  reporting,  including  the  possibility  of 
collusion or improper management override of controls, material misstatements due to error or fraud may not be 
prevented  or  detected  on  a  timely  basis.  Also,  projections  of  any  evaluation  of  the  effectiveness  of  the  internal 
control over financial reporting to future periods are subject to the risk that the controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. 

In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting 
as of December 31, 2015, based on the criteria established in Internal Control — Integrated Framework (2013) 
issued by the Committee of Sponsoring Organizations of the Treadway Commission. 

We  have  also  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board 
(United  States),  the  consolidated  financial  statements  as  of  and  for  the  year  ended  December  31,  2015  of  the 
Company and our report dated February 19, 2016 expressed an unqualified opinion on those financial statements.  

/s/ Deloitte & Touche LLP 

Houston, Texas 
February 19, 2016 

47 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
AND SUBSIDIARIES 

CONSOLIDATED BALANCE SHEETS 
(In thousands, except share and per share data) 

December 31, 

2015 

2014 

Current assets: 

ASSETS 

  Cash and cash equivalents ..........................................................................   $ 
  Marketable securities ..................................................................................  
  Accounts receivable, net of allowance for bad debts ..................................  
  Prepaid expenses and other current assets ..................................................  
  Assets held for sale .....................................................................................  
          Total current assets .............................................................................  
Drilling and other property and equipment, net of 
  accumulated depreciation ........................................................................  
Other assets .................................................................................................  
          Total assets .........................................................................................   $ 

119,028  $ 
11,518 
405,370 
119,479 
14,200 
669,595 

233,623 
16,033 
463,862 
185,541 
-- 
899,059 

6,378,814 
116,480 
7,164,889  $ 

6,945,953 
176,277 
8,021,289 

LIABILITIES AND STOCKHOLDERS’ EQUITY 

Current liabilities: 
  Accounts payable .......................................................................................   $ 
  Accrued liabilities ......................................................................................  
  Taxes payable .............................................................................................  
  Short-term borrowings ...............................................................................  
  Current portion of long-term debt ..............................................................  
          Total current liabilities .......................................................................  
Long-term debt ...........................................................................................  
Deferred tax liability ..................................................................................  
Other liabilities ...........................................................................................  
          Total liabilities....................................................................................  

70,272  $ 

253,769 
15,093 
286,589 
-- 
625,723 
1,994,773 
276,529 
155,094 
3,052,119 

138,444 
426,592 
41,648 
-- 
249,962 
856,646 
1,994,526 
530,394 
188,160 
3,569,726 

Commitments and contingencies (Note 12) 

Stockholders’ equity: 

  Preferred stock (par value $0.01, 25,000,000 shares authorized, none  
      issued and outstanding) ..........................................................................  

  Common stock (par value $0.01, 500,000,000 shares authorized;  

143,978,877 shares issued and 137,158,706 shares outstanding at 
December 31, 2015; 143,960,260 shares issued and 137,147,899 shares 
outstanding at December 31, 2014) .........................................................  
  Additional paid-in capital ...........................................................................  
  Retained earnings .......................................................................................  
  Accumulated other comprehensive gain (loss)  ..........................................  
  Treasury stock, at cost (6,820,171 and 6,812,361 shares of common stock 
at December 31, 2015 and 2014, respectively) .......................................  
          Total stockholders’ equity ..................................................................  
          Total liabilities and stockholders’ equity ............................................   $ 

-- 

-- 

1,440 
1,999,634 
2,319,136 
(5,035) 

(202,405) 
4,112,770 
7,164,889  $ 

1,440 
1,993,898 
2,661,999 
(3,605) 

(202,169) 
4,451,563 
8,021,289 

The accompanying notes are an integral part of the consolidated financial statements. 

48 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
AND SUBSIDIARIES 

CONSOLIDATED STATEMENTS OF OPERATIONS 
 (In thousands, except per share data) 

Year Ended December 31, 

2015 

2014 

2013 

Revenues: 
           Contract drilling ....................................................... $  
           Revenues related to reimbursable expenses .............    
Total revenues ................................................    

$  

2,360,184 
59,209 
2,419,393 

2,737,126  $  
77,545 
2,814,671 

2,843,584 
76,837 
2,920,421 

Operating expenses: 

Contract drilling, excluding depreciation .................    
Reimbursable expenses ............................................    
Depreciation .............................................................    
General and administrative ......................................
Impairment of assets ................................................
Bad debt expense .....................................................    
Restructuring and separation costs ...........................    
Gain on disposition of assets ....................................    
Total operating expenses ................................    

1,227,864 
58,050 
493,162 
66,462 
860,441 
-- 
9,778 
(2,290) 
2,713,467 

1,523,623 
76,091 
456,483 
81,832 
109,462 
-- 
-- 
(5,382) 
2,242,109 

1,572,525 
74,967 
388,092 
64,788 
-- 
22,513 
-- 
(4,070) 
2,118,815 

Operating (loss) income ....................................................

(294,074) 

572,562 

801,606 

Other income (expense): 

Interest income .........................................................
Interest expense, net of amounts capitalized ............    
Foreign currency transaction gain (loss) ..................
Other, net .................................................................

 (Loss) income before income tax benefit (expense) .......  .   

3,322 
(93,934) 
2,465 
873 
(381,348) 

801 
(62,053) 
3,199   
682 
515,191 

701 
(24,843)   
(4,915)  
1,691 
774,240 

Income tax benefit (expense) ............................................    

107,063 

(128,180) 

(225,554) 

Net (loss) income  ...............................................................

$  

(274,285) 

$  

387,011 

$  

548,686 

(Loss) earnings per share: 
     Basic .............................................................................. $  
     Diluted ........................................................................... $  

(2.00)  $  
(2.00)  $  

2.82  $  
2.81  $  

3.95 
3.95 

Weighted-average shares outstanding: 

Shares of common stock ..........................................
Dilutive potential shares of common stock ..............
        Total weighted-average shares outstanding  .........

137,157 
-- 
137,157 

137,473 
50 
137,523 

139,035 
29 
139,064 

Cash dividends declared per share of common stock .......... $                0.50 

$  

3.50  $  

3.50 

The accompanying notes are an integral part of the consolidated financial statements. 

49 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
   
   
 
   
   
   
   
   
   
 
   
   
 
   
   
 
   
   
 
 
   
 
   
 
   
 
 
   
   
 
   
   
 
   
   
 
 
   
   
 
  
  
  
  
  
  
 
  
  
  
  
  
  
 
  
  
  
 
   
   
 
  
 
 
 
 
  
  
  
   
   
 
  
  
  
   
   
 
 
 
 
 
 
 
 
 
  
 
 
 
  
 
 
 
  
  
  
 
  
  
  
  
  
  
 
  
  
  
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
AND SUBSIDIARIES 

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OR LOSS 
(In thousands) 

Year Ended December 31, 
2014 

2013 

2015 

Net (loss) income .........................................................................  $  

(274,285)  $  

387,011 

$  

548,686 

Other comprehensive (losses) gains, net of tax: 
  Derivative financial instruments: 

Unrealized holding loss ....................................................... 
Reclassification adjustment for loss (gain) included in net 
income ............................................................................. 

(1,574) 

             5,084 

(1,482) 

(2,379) 

(6,833) 

4,840 

Investments in marketable securities: 

Unrealized holding loss on investments .............................. 
  Reclassification  adjustment  for  gain  included  in  net 
income ............................................................................. 
Total other comprehensive loss  .......................................... 

            (4,940) 

(69) 

(6) 

                   -- 
            (1,430) 

                   (25) 
              (3,955) 
383,056 

(147) 
              (2,146) 
$            546,540 

Comprehensive (loss) income ....................................................  $         (275,715)  $       

The accompanying notes are an integral part of the consolidated financial statements. 

50 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
  
  
  
  
  
  
 
  
  
  
 
 
 
 
 
 
 
  
  
  
 
  
  
  
 
  
  
 
 
 
       
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
AND SUBSIDIARIES 

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY 
(In thousands, except number of shares) 

January 1, 2013 .....................    143,948,370 

1,439 

Common Stock 

Shares 

Amount 

Additional 
Paid-In 
Capital 
 1,983,957 

Net income ..............................   

Dividends to stockholders 
($3.50 per share) .....................
Anti-dilution adjustment 
paid to stock plan 
participants ($3.00 per 
share) .......................................
Stock options exercised ..........   

Stock-based compensation, 
net of tax .................................
Net loss on derivative 

financial instruments ............
Net loss on investments ..........   

-- 

-- 

-- 
3,878 

-- 

-- 
-- 

-- 

-- 

-- 
 1 

-- 

-- 
-- 

-- 

-- 

-- 
109 

4,654 

-- 
-- 

December 31, 2013 ................    143,952,248 

1,440 

 1,988,720 

Net income ..............................   

Dividends to stockholders 
($3.50 per share) .....................
Anti-dilution adjustment 
paid to stock plan 
participants ($3.00 per 
share) .......................................
Treasury stock purchase .........   

-- 

-- 

-- 
-- 

Stock options exercised ..........   

8,012 

Stock-based compensation, 
net of tax .................................
Net loss on derivative 
financial instruments ..............

Net loss on investments ..........  

-- 

-- 

-- 

-- 

-- 
 -- 

 -- 

 -- 

-- 

-- 

-- 

-- 
-- 

213 

4,965 

-- 

Retained 
Earnings 

2,702,915 

548,686 

(486,620) 

(3,820) 
-- 

-- 

-- 
-- 

2,761,161 

387,011 

(481,642) 

(4,531) 
-- 

-- 

-- 

-- 

Accumulated 
Other 
Comprehensive 
Gains (Losses) 
2,496 

-- 

-- 

-- 
-- 

-- 

(1,993) 
    (153) 

Shares 
4,916,800    

--    

-- 

-- 
--    

-- 

-- 
--    

Treasury Stock 

Total 
Stockholders’ 
Equity 
4,576,394 

Amount 

(114,413)    

-- 

-- 

-- 
-- 

-- 

-- 
-- 

548,686 

(486,620) 

(3,820) 
110 

4,654 

(1,993) 
(153) 

350 

4,916,800    

(114,413)    

4,637,258 

-- 

-- 

-- 
-- 

-- 

-- 

(3,861) 

-- 

-- 

-- 

--    

-- 

-- 

-- 

-- 

-- 

1,895,561    

(87,756)    

--    

--    

-- 

-- 

-- 

-- 

-- 

-- 

6,812,361    

(202,169)    

--    

-- 

-- 

-- 

387,011 

(481,642) 

(4,531) 
(87,756) 

213 

4,965 

(3,861) 

(94) 
4,451,563 

(274,285) 

(68,578) 

7,810 

(236) 

5,500 

3,510 

               (4,940) 

-- 

--    

-- 

-- 

3,510 

(4,940) 

-- 
December 31, 2014 ................    143,960,260 

-- 
1,440 

-- 
   1,993,898 

-- 
2,661,999 

(94) 
               (3,605) 

Net loss....................................   

Dividends to stockholders 
($0.50 per share) .....................
Stock-based compensation, 
net of tax .................................
Net gain on derivative 
financial instruments ..............

Net loss on investments ..........   

-- 

-- 

18,617 

-- 

-- 

-- 

-- 

-- 

-- 

-- 

-- 

-- 

5,736 

-- 

-- 

(274,285) 

(68,578) 

-- 

-- 

-- 

December 31, 2015 ................    143,978,877 

$ 

1,440   $  1,999,634  $       2,319,136  

$       

   (5,035) 

      6,820,171  $   (202,405)  $    4,112,770 

The accompanying notes are an integral part of the consolidated financial statements. 

51 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
  
  
  
  
  
  
  
 
  
 
  
  
  
 
  
 
  
 
  
 
  
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
  
  
  
  
  
  
  
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
                 
 
  
 
  
 
  
 
  
  
  
  
           
  
  
  
  
  
  
  
  
  
  
  
  
 
  
 
  
  
  
 
  
 
  
 
  
 
  
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
  
 
  
 
  
 
  
                 
 
  
 
  
 
  
 
  
  
  
  
  
  
  
  
  
  
 
  
 
  
  
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
                      
 
  
 
  
 
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
AND SUBSIDIARIES 

CONSOLIDATED STATEMENTS OF CASH FLOWS  
(In thousands) 

Year Ended December 31,  

2015 

2014 

2013 

(274,285) 

$ 

387,011 

$ 

548,686 

Operating activities: 
  Net (loss) income .................................................................................   $ 
  Adjustments to reconcile net (loss) income to net cash 
     provided by operating activities: 
     Depreciation ......................................................................................  
     Loss on impairment of assets ............................................................  
     Gain on disposition of assets .............................................................  
     Bad debt expense ..............................................................................  
     Loss (gain) on foreign currency forward exchange contracts ............  
     Deferred tax provision  .....................................................................  
     Stock-based compensation expense ..................................................  
     Deferred income, net .........................................................................  
     Deferred expenses, net ......................................................................  
     Long-term employee remuneration programs ...................................  
     Other assets, noncurrent ....................................................................  
     Other liabilities, noncurrent ..............................................................  
  (Payments of) proceeds from settlement of foreign currency forward 
exchange contracts designated as accounting hedges .........................  

493,162 
860,441 
           (2,290) 
-- 
8,364 
(242,034) 
4,856 
(45,383) 
(26,405) 
(1,838) 
2,483 
(3,890) 

             (8,364) 

1,069 
             1,627 

  Bank deposits denominated in nonconvertible currencies....................  
  Other ....................................................................................................  
  Changes in operating assets and liabilities: 
     Accounts receivable ..........................................................................  
     Prepaid expenses and other current assets .........................................  
     Accounts payable and accrued liabilities ..........................................  
     Taxes payable ...................................................................................  
       Net cash provided by operating activities .......................................  
Investing activities: 
     Capital expenditures (including rig construction) .............................  
     Proceeds from disposition of assets, net of disposal costs .................  
     Proceeds from sale and maturities of marketable securities ..............  
     Purchases of marketable securities ....................................................  
       Net cash used in investing activities ...............................................  
Financing activities: 
     Repayment of long-term debt............................................................  
     Issuance of senior notes ....................................................................  
     Proceeds from short-term borrowings, net of repayments .................  
     Debt issuance costs and arrangement fees ........................................  
     Payment of dividends and anti-dilution payments ............................  
     Purchase of treasury stock .................................................................  
     Other .................................................................................................  
       Net cash (used in) provided by financing activities ........................  
Net change in cash and cash equivalents ............................................  
     Cash and cash equivalents, beginning of year ...................................  
     Cash and cash equivalents, end of year .............................................   $ 

58,872 
19,195 
(180,872) 
71,719 
         736,427 

(830,655) 
13,049 
51 
-- 
        (817,555) 

        (250,000) 
-- 
286,589 
              (624) 
(69,432) 
-- 
-- 
        (33,467) 
        (114,595) 
    233,623 
 119,028 

456,483 
109,462 
(5,382) 
-- 
(3,275) 
1,532 
3,507 
60,061 
(82,814) 
1,195 
2,881 
(3,979) 

388,092 
-- 
(4,070) 
22,513 
6,501 
34,101 
3,573 
(54,274) 
25,604 
8,966 
(4,922) 
(5,296) 

             3,275 
5,520 
             1,923 

            (6,501) 
(12,741) 
             1,247 

5,269 
(2,791) 
27,463 
25,490 
992,831 

(2,032,764) 
18,318 
8,000,057 
(6,265,846) 
(280,235) 

7,905 
10,066 
46,752 
49,786 
1,065,988 

(957,598) 
4,900 
4,650,085 
(5,249,462) 
(1,552,075) 

        (250,000) 
-- 
-- 
            (2,249) 
(486,240) 
(87,756) 
261 
        (825,984) 
        (113,388) 
    347,011 
 233,623 

$ 

-- 
      997,805 
-- 
            (9,973) 
(490,331) 
-- 
165 
497,666 
        11,579 
    335,432 
 347,011 

$ 

The accompanying notes are an integral part of the consolidated financial statements. 

52 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DIAMOND OFFSHORE DRILLING, INC. 
AND SUBSIDIARIES 

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 

1. General Information  

Diamond  Offshore  Drilling,  Inc.  is  a  leader  in  offshore  drilling,  providing  contract  drilling  services  to  the 
energy  industry  around  the  globe  with  a  fleet  of  32  offshore  drilling  rigs,  consisting  of  eight  ultra-deepwater, 
seven deepwater and eight mid-water semisubmersibles, four dynamically positioned drillships and five jack-ups.    
Unless  the  context  otherwise  requires,  references  in  these  Notes  to  “Diamond  Offshore,”  “we,”  “us”  or  “our” 
mean Diamond Offshore Drilling, Inc. and our consolidated subsidiaries.  We were incorporated in Delaware in 
1989. 

As  of  February  16,  2016,  Loews  Corporation,  or  Loews,  owned  53%  of  the  outstanding  shares  of  our 

common stock.  

Principles of Consolidation 

Our  consolidated  financial  statements  include  the  accounts  of  Diamond  Offshore  Drilling,  Inc.  and  our 

subsidiaries after elimination of intercompany transactions and balances. 

Use of Estimates in the Preparation of Financial Statements 

The  preparation  of  financial  statements  in  conformity  with  accounting  principles  generally  accepted  in  the 
United States, or U.S., or GAAP, requires management to make estimates and assumptions that affect the reported 
amounts  of  assets  and  liabilities  and  disclosure  of  contingent  assets  and  liabilities  at  the  date  of  the  financial 
statements and the reported amount of revenues and expenses during the reporting period.  Actual results could 
differ from those estimated. 

Cash and Cash Equivalents  

We consider short-term, highly liquid investments that have an original maturity of three months or less and 

deposits in money market mutual funds that are readily convertible into cash to be cash equivalents.   

The effect of exchange rate changes on cash balances held in foreign currencies was not material for the years 

ended December 31, 2015, 2014 and 2013. 

Marketable Securities 

We classify our investments in marketable securities as available for sale and they are stated at fair value in 
our Consolidated Balance Sheets.  Accordingly, any unrealized gains and losses, net of taxes, are reported in our 
Consolidated Balance Sheets in “Accumulated other comprehensive gain (loss)” until realized.  The cost of debt 
securities is adjusted for amortization of premiums and accretion of discounts to maturity and such adjustments 
are  included  in  our  Consolidated  Statements  of  Operations  in  “Interest  income.”  The  sale  and  purchase  of 
securities  are  recorded  on  the  date  of  the  trade.    The  cost  of  debt  securities  sold  is  based  on  the  specific 
identification method.  Realized gains or losses, as well as any declines in value that are judged to be other than 
temporary, are reported in our Consolidated Statements of Operations in “Other income (expense) – Other, net.”  
See Note 6.  

Provision for Bad Debts 

  We  record  a  provision  for  bad  debts  on  a  case-by-case  basis  when  facts  and  circumstances  indicate  that  a 
customer receivable may not be collectible.  In establishing these reserves, we consider historical and other factors 
that predict collectability, including write-offs, recoveries and the monitoring of credit quality.  Such provision is 
reported as a component of “Operating expense” in our Consolidated Statements of Operations.  See Note 3. 

53 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Derivative Financial Instruments 

Our  derivative  financial  instruments  have  primarily  consisted  of  foreign  currency  forward  exchange,  or 
FOREX,  contracts  which  we  may  designate  as  cash  flow  hedges.    In  accordance  with  GAAP,  each  derivative 
contract  is  stated  in  the  balance  sheet  at  its  fair  value  with  gains  and  losses  reflected  in  the  income  statement 
except that, to the extent the derivative qualifies for and is designated as an accounting hedge, the gains and losses 
are  reflected  in  income  in  the  same  period  as  offsetting  gains  and  losses  on  the  qualifying  hedged  positions.  
Designated hedges are expected to be highly effective, and therefore, adjustments to record the carrying value of 
the  effective  portion  of  our  derivative  financial  instruments  to  their  fair  value  are  recorded  as  a  component  of 
“Accumulated other comprehensive gain (loss),” or AOCGL, in our Consolidated Balance Sheets.  The effective 
portion of the cash flow hedge will remain in AOCGL until it is reclassified into earnings in the period or periods 
during which the hedged transaction affects earnings or it is determined that the hedged transaction will not occur.  
We report such realized gains and losses as a component of “Contract drilling, excluding depreciation” expense in 
our  Consolidated  Statements  of  Operations  to  offset  the  impact  of  foreign  currency  fluctuations  in  our 
expenditures in local foreign currencies in the countries in which we operate. 

  Adjustments to record the carrying value of the ineffective portion of our derivative financial instruments to 
fair value and realized gains or losses upon settlement of derivative contracts not designated as cash flow hedges 
are  reported  as  “Foreign  currency  transaction  gain  (loss)”  in  our  Consolidated  Statements  of  Operations.    See 
Notes 7 and 8. 

Assets Held For Sale 

At December 31, 2015, we reported the $14.2 million carrying value of five of our jack-up rigs as “Assets 
held for sale” in our Consolidated Balance Sheets.  One of these rigs was subsequently sold for $8.0 million in 
February 2016.  See Notes 2 and 9. 

Drilling and Other Property and Equipment 

We carry our drilling and other property and equipment at cost, less accumulated depreciation.  Maintenance 
and routine repairs are charged to income currently while replacements and betterments that upgrade or increase 
the  functionality  of  our  existing  equipment  and  that  significantly  extend  the  useful  life  of  an  existing  asset,  are 
capitalized.    Significant  judgments,  assumptions  and  estimates  may  be  required  in  determining  whether  or  not 
such replacements and betterments meet the criteria for capitalization and in determining useful lives and salvage 
values of such assets.  Changes in these judgments, assumptions and estimates could produce results that differ 
from  those  reported.    During  the  years  ended  December  31,  2015  and  2014, we  capitalized  $262.4  million  and 
$546.0 million, respectively, in replacements and betterments of our drilling fleet. 

Costs incurred for major rig upgrades and/or the construction of rigs are accumulated in construction work-in-
progress, with no depreciation recorded on the additions, until the month the upgrade or newbuild is completed 
and the rig is placed in service.  Upon retirement or sale of a rig, the cost and related accumulated depreciation are 
removed from the respective accounts and any gains or losses are included in our results of operations as “Gain on 
disposition  of  assets.”    Depreciation  is  recognized  up  to  applicable  salvage  values  by  applying  the  straight-line 
method over the remaining estimated useful lives from the year the asset is placed in service.  Drilling rigs and 
equipment are depreciated over their estimated useful lives ranging from 3 to 30 years. 

Capitalized Interest 

We  capitalize  interest  cost  for  qualifying  construction  and  upgrade  projects.    During  the  three  years  ended 
December 31, 2015, we capitalized interest on qualifying expenditures, primarily related to our rig construction 
projects.  See Note 9.   

54 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
A reconciliation of our total interest cost to “Interest expense” as reported in our Consolidated Statements of 

Operations is as follows: 

Total interest cost including amortization of debt issuance costs ................
Capitalized interest .....................................................................................
    Total interest expense as reported ...........................................................

Impairment of Long-Lived Assets 

For the Year Ended December 31, 
2014 
2015 
(In thousands) 
  $      122,656 
          (60,603) 
  $        62,053 

  $      110,242 
          (16,308) 
  $        93,934 

  $        99,080 
          (74,237) 
  $        24,843 

2013 

  We evaluate our property and equipment for impairment whenever changes in circumstances indicate that the 
carrying  amount  of  an  asset  may  not  be  recoverable  (such  as,  but  not  limited  to,  cold  stacking  a  rig,  the 
expectation of cold stacking a rig in the near term, contracted backlog of less than one year for a rig, a decision to 
retire or scrap a rig, or excess spending over budget on a newbuild, construction project or major rig upgrade).  
We utilize an undiscounted probability-weighted cash flow analysis in testing an asset for potential impairment.  
Our assumptions and estimates underlying this analysis include the following: 

(cid:120) 
(cid:120) 

(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 
(cid:120) 

dayrate by rig;  
utilization rate by rig if active, warm stacked or cold stacked (expressed as the actual percentage of 
time per year that the rig would be used at certain dayrates); 
the per day operating cost for each rig if active, warm stacked or cold stacked;  
the estimated annual cost for rig replacements and/or enhancement programs; 
the estimated maintenance, inspection or other costs associated with a rig returning to work; 
salvage value for each rig; and 
estimated proceeds that may be received on disposition of each rig.  

Based  on  these  assumptions,  we  develop  a  matrix  for  each  rig  under  evaluation  using  multiple 
utilization/dayrate  scenarios,  to  each  of  which  we  have  assigned  a  probability  of  occurrence.    We  arrive  at  a 
projected probability- weighted cash flow for each rig based on the respective matrix and compare such amount to 
the carrying value of the asset to assess recoverability. 

The underlying assumptions and assigned probabilities of occurrence for utilization and dayrate scenarios are 
developed using a methodology that examines historical data for each rig, which considers the rig’s age, rated water 
depth  and  other  attributes  and  then  assesses  its  future  marketability  in  light  of  the  current  and  projected  market 
environment at the time of assessment.  Other assumptions, such as operating, maintenance and inspection costs, 
are  estimated  using  historical  data  adjusted  for  known  developments  and  future  events  that  are  anticipated  by 
management at the time of the assessment.   

  Management’s  assumptions  are  necessarily  subjective  and  are  an  inherent  part  of  our  asset  impairment 
evaluation,  and  the  use  of  different  assumptions  could  produce  results  that  differ  from  those  reported.    Our 
methodology generally involves the use of significant unobservable inputs, representative of a Level 3 fair value 
measurement,  which  may  include  assumptions  related  to  future  dayrate  revenue,  costs  and  rig  utilization,  quotes 
from  rig  brokers,  the  long-term  future  performance  of  our  rigs  and  future  market  conditions.    Management’s 
assumptions involve uncertainties about future demand for our services, dayrates, expenses and other future events, 
and  management’s  expectations  may  not  be  indicative  of  future  outcomes.    Significant  unanticipated  changes  to 
these  assumptions  could  materially  alter  our  analysis  in  testing  an  asset  for  potential  impairment.    For  example, 
changes in market conditions that exist at the measurement date or that are projected by management could affect 
our  key  assumptions.    Other  events  or  circumstances  that  could  affect  our  assumptions  may  include,  but  are  not 
limited to, a further sustained decline in oil and gas prices, cancelations of our drilling contracts or contracts of our 
competitors,  contract  modifications,  costs  to  comply  with  new  governmental  regulations,  growth  in  the  global 
oversupply of oil and geopolitical events, such as lifting sanctions on oil-producing nations.  Should actual market 
conditions  in  the  future  vary  significantly  from  market  conditions  used  in  our  projections,  our  assessment  of 
impairment would likely be different.  See Note 2. 

55 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair Value of Financial Instruments 

We believe that the carrying amount of our current financial instruments approximates fair value because of 

the short maturity of these instruments.  See Note 8.   

Debt Issuance Costs 

Debt  issuance  costs  are  included  in  our  Consolidated  Balance  Sheets  at  December  31,  2015  and  2014  in 
“Other  assets”  and  are  amortized  over  the  respective  terms  of  the  related  debt.    In  April  2015,  the  Financial 
Accounting  Standards  Board,  or  FASB,  issued  Accounting  Standards  Update,  or  ASU,  No.  2015-03,  Interest  - 
Imputation of Interest (Subtopic 835-30);  Simplifying the Presentation of Debt Issuance Costs, or ASU 2015-03, 
which requires debt issuance costs associated with our senior notes (See Note 10) to be presented in the balance 
sheet as a direct deduction from the carrying amount of the related senior note.  This change is effective for fiscal 
years beginning after December 15, 2015, with early adoption permitted.  We will be adopting the provisions of 
ASU  2015-03  in  the  first  quarter  of  2016,  which  will  affect  only  the  presentation  of  such  amounts  in  our 
Consolidated Balance Sheets. 

Income Taxes  

We account for income taxes in accordance with accounting standards that require the recognition of the amount 
of taxes payable or refundable for the current year and an asset and liability approach in recognizing the amount of 
deferred tax liabilities and assets for the future tax consequences of events that have been currently recognized in our 
financial statements or tax returns.  In each of our tax jurisdictions we recognize a current tax liability or asset for the 
estimated taxes payable or refundable on tax returns for the current year and a deferred tax asset or liability for the 
estimated future tax effects attributable to temporary differences and carryforwards.  Deferred tax assets are reduced 
by  a  valuation  allowance,  if  necessary,  which  is  determined  by  the  amount  of  any  tax  benefits  that,  based  on 
available evidence, are not expected to be realized under a “more likely than not” approach.  We make judgments 
regarding future events and related estimates especially as they pertain to the forecasting of our effective tax rate, the 
potential realization of deferred tax assets such as utilization of foreign tax credits, and exposure to the disallowance 
of items deducted on tax returns upon audit. 

We record interest related to accrued unrecognized tax positions in interest expense and recognize penalties 

associated with uncertain tax positions in our tax expense.  See Note 15. 

Current GAAP  requires  a reporting  entity  to  separate deferred  income  tax  liabilities  and  assets  into current 
and noncurrent amounts in a classified statement of financial position based on the underlying assets and liabilities 
to  which  such  deferred  income  taxes  relate.    To  simplify  the  presentation  of  deferred  income  taxes,  the  FASB 
issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, or ASU 2015-17, in November 2015, 
which  requires  that  deferred  tax  liabilities  and  assets  be  classified  as  noncurrent  in  a  classified  statement  of 
financial position.  ASU 2015-17 is effective for annual and interim reporting periods beginning after December 
15, 2016 with earlier application permitted.  We have elected to early adopt ASU 2015-17 and are prospectively 
applying  the  classification  requirements  as  of  the  beginning  of  2015.    Our  Consolidated  Balance  Sheet  at 
December 31, 2014 has not been retrospectively adjusted.  See Note 15. 

Treasury Stock  

In connection with the vesting of restricted stock units held by our chief executive officer, or CEO, in 2015, 
we  acquired  7,810  shares  of  our  common  stock  (valued  at  $0.2  million)  in  satisfaction  of  tax  withholding 
obligations that were incurred on the vesting date.  See Note 3.   

Depending  on market  conditions,  we  may,  from  time  to  time,  purchase  shares of our  common  stock in  the 
open market or otherwise.  We account for the purchase of treasury stock using the cost method, which reports the 
cost  of  the  shares  acquired  in  “Treasury  stock”  as  a  deduction  from  stockholders’  equity  in  our  Consolidated 
Balance Sheets.  During the year ended December 31, 2014, we repurchased 1,895,561 shares of our outstanding 
common stock at a cost of $87.8 million.  We did not repurchase any shares of our outstanding common stock 
during 2015 or 2013. 

56 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Comprehensive Income (Loss) 

Comprehensive  income  (loss)  is  the  change  in  equity  of  a  business  enterprise  during  a  period  from 
transactions and other events and circumstances except those transactions resulting from investments by owners 
and distributions to owners.  Comprehensive income (loss) for the three years ended December 31, 2015, 2014 
and  2013  includes  net  income  (loss)  and  unrealized  holding  gains  and  losses  on  marketable  securities  and 
financial derivatives designated as cash flow accounting hedges.  See Note 11. 

Foreign Currency    

Our  functional  currency  is  the  U.S.  dollar.    Foreign  currency  transaction  gains  and  losses  are  reported  as 
“Foreign  currency  transaction  gain  (loss)”  in  our  Consolidated  Statements  of  Operations  and  include,  when 
applicable,  unrealized  gains  and  losses  to  record  the  carrying  value  of  our  FOREX  contracts  not  designated  as 
accounting hedges, as well as realized gains and losses from the settlement of such contracts.  For the years ended 
December 31, 2015, 2014 and 2013, we recognized aggregate net foreign currency gains (losses) of $2.5 million, 
$3.2 million and $(4.9) million, respectively.  See Note 7. 

Revenue Recognition 

We  recognize  revenue  from  dayrate  drilling  contracts  as  services  are  performed.    In  connection  with  such 
drilling contracts, we may receive fees (on either a lump-sum or dayrate basis) for the mobilization of equipment.  
We  earn  these  fees  as  services  are  performed  over  the  initial  term  of  the  related  drilling  contracts.    We  defer 
mobilization fees received, as well as direct and incremental mobilization costs incurred, and amortize each, on a 
straight-line basis, over the term of the related drilling contracts (which is the period we estimate to be benefited 
from  the  mobilization  activity).    Straight-line  amortization  of  mobilization  revenues  and  related  costs  over  the 
term of the related drilling contracts (which generally range from two to 60 months) is consistent with the timing 
of net cash flows generated from the actual drilling services performed.  Absent a contract, mobilization costs are 
recognized currently.  Upon completion of a drilling contract, we recognize in earnings any demobilization fees 
received and costs incurred.   

Some  of  our  drilling  contracts  require  downtime  before  the  start  of  the  contract  to  prepare  the  rig  to  meet 
customer requirements.  At times, we may be compensated by the customer for such work (on either a lump-sum 
or dayrate basis).  These fees are generally earned as services are performed over the initial term of the related 
drilling contracts.  We defer contract preparation fees received, as well as direct and incremental costs associated 
with  the  contract  preparation  activities  and  amortize  each,  on  a  straight-line  basis,  over  the  term  of  the  related 
drilling contracts (which we estimate to be benefited from the contract preparation activity). 

From time to time, we may receive fees from our customers for capital improvements to our rigs (on either a 
lump-sum  or  dayrate  basis).   We defer  such  fees received in  “Accrued  liabilities”  and “Other  liabilities”  in our 
Consolidated Balance Sheets and recognize these fees into income on a straight-line basis over the period of the 
related  drilling  contract.  We  capitalize  the  costs  of  such  capital  improvements  and  depreciate  them  over  the 
estimated useful life of the improvement.  

We  record  reimbursements  received  for  the  purchase  of  supplies,  equipment,  personnel  services  and  other 
services provided at the request of our customers in accordance with a contract or agreement, for the gross amount 
billed  to  the  customer,  as  “Revenues  related  to  reimbursable  expenses”  in  our  Consolidated  Statements  of 
Operations.  

Recent Accounting Pronouncements 

In May 2014, the FASB, issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), or 
ASU 2014-09.  The new standard supersedes the industry-specific standards that currently exist under GAAP and 
provides  a  framework  to  address  revenue  recognition  issues  comprehensively  for  all  contracts  with  customers 
regardless of industry-specific or transaction-specific fact patterns.  Under the new guidance, companies recognize 
revenue  to  depict  the  transfer  of  promised  goods  or  services  to  customers  in  an  amount  that  reflects  the 
consideration to which the company expects to be entitled in exchange for those goods or services.  ASU 2014-09 
also  provides  for  additional  disclosure  requirements.    In  July  2015,  the  FASB  issued  ASU  2015-14,  which 
deferred the effective date of ASU 2014-09.  The guidance of ASU 2014-09 is now effective for annual reporting 
periods  beginning  after  December  15,  2017,  including  interim  periods within  that reporting period, and  may  be 
adopted using a retrospective or modified retrospective approach.   

57 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2.  Asset Impairments    

2015 Impairments - During 2015, in response to a continued deterioration of the market fundamentals in the 
oil and gas industry, including the dramatic decline in oil prices, significant cutbacks in customer capital spending 
plans  and  contract  cancelations  by  customers,  as  well  as  pending  regulatory  requirements  in  the  U.S.  Gulf  of 
Mexico, or  GOM,  we  evaluated  25 of our  drilling  rigs  with  indications  that  their  carrying  amounts  may  not  be 
recoverable (See Note 1).  Using an undiscounted, projected probability-weighted cash flow analysis as described 
in  Note  1,  we  determined  that  the  carrying  value  of  17  of  these  rigs,  consisting  of  two  ultra-deepwater,  one 
deepwater and nine mid-water floaters and five jack-up rigs, were impaired (collectively referred to as the 2015 
Impaired Rigs).   

  We estimated the fair value of 16 of the 2015 Impaired Rigs utilizing a market approach, which required us to 
estimate the value that would be received for each rig in the principal or most advantageous market for that rig in 
an  orderly  transaction  between  market  participants.    Such  estimates  were  based  on  various  inputs,  including 
historical contracted sales prices for similar rigs in our fleet, nonbinding quotes from rig brokers and/or indicative 
bids,  where  applicable.    We  estimated  the  fair  value  of  the  one  remaining  2015  Impaired  Rig  using  an  income 
approach, as we determined that the most likely use for this rig would be to cold stack the rig and reintroduce it 
into  the  market  at  a  later  date.    The  fair  value  of  this  rig  was  estimated  based  on  a  calculation  of  the  rig’s 
discounted future net cash flows over its remaining economic life, which utilized significant unobservable inputs, 
including,  but  not  limited  to,  assumptions  related  to  estimated  dayrate  revenue,  rig  utilization,  estimated 
equipment upgrade and regulatory survey costs, as well as estimated proceeds that may be received on ultimate 
disposition of the rig.  Our fair value estimates are representative of Level 3 fair value measurements due to the 
significant level of estimation involved and the lack of transparency as to the inputs used.   

During the first, third and fourth quarters of 2015, we recognized impairment losses of $358.5 million, $2.6 
million and $499.4 million, respectively, for an aggregate impairment loss of $860.4 million for the year ended 
December  31,  2015.    Of  the  2015  Impaired  Rigs,  five  mid-water  rigs  were  sold  during  2015.    We  are  actively 
marketing for sale the five jack-up rigs in the impairment group and have presented the $14.2 million aggregate 
carrying value of these rigs as “Assets Held for Sale” in our Consolidated Balance Sheets at December 31, 2015.  
Six of the 2015 Impaired Rigs were cold stacked at the end of 2015, and the remaining impaired rig is expected to 
be sold for scrap after completion of its contract in 2016.  We have reported the $175.4 million aggregate carrying 
value  of  these  rigs  in  “Drilling  and  other  property  and  equipment,  net  of  accumulated  depreciation”  in  our 
Consolidated Balance Sheets at December 31, 2015, as they did not qualify for reporting as assets held for sale. 

In February 2016, we sold one of our marketed-for-sale jack-up rigs for $8.0 million. 

If  market  fundamentals  in  the  oil  and  gas  industry  deteriorate  further  or  if  we  are  unable  to  secure  new  or 
extend contracts for our current, actively-marketed drilling fleet or reactivate any of our cold stacked rigs or if we 
experience  unfavorable  changes  to  our  actual  dayrates  and  rig  utilization,  we  may  be  required  to  recognize 
additional impairment losses in future periods, if we are unable to recover the carrying value of any of our drilling 
rigs. 

2014  Impairments  -  During  the  third  quarter  of  2014,  we  initiated  a  plan  to  retire  and  scrap  six  mid-water 
drilling rigs.  Using an undiscounted, projected probability-weighted cash flow analysis as described in Note 1, we 
determined that the carrying values of these six rigs were impaired, collectively referred to as the 2014 Impaired 
Rigs.  We determined the fair value of the 2014 Impaired Rigs by applying a combination of income and market 
approaches  which  were  representative  of  Level  3  fair  value  measurements  due  to  the  significant  level  of 
estimation  involved  and  the  lack  of  transparency  as  to  the  inputs  used.    As  a  result  of  our  valuations,  we 
recognized an impairment loss aggregating $109.5 million during the third quarter of 2014.   

 At December 31, 2014, we had six additional rigs with indications that their carrying amounts may not be 
recoverable.    We  performed  an  impairment  analysis  for  each  of  these  rigs  using  the  methodology  described  in 
Note 1 and concluded that these rigs were not impaired at December 31, 2014.   

During  the  fourth  quarter  of  2014,  two  of  the  2014  Impaired  Rigs  were  sold  for  scrap.    The  $9.4  million 
aggregate book value of the four remaining 2014 Impaired Rigs was reported in “Drilling and other property and 
equipment,  net  of  accumulated  depreciation”  in  our  Consolidated  Balance  Sheets  at  December  31,  2014.    The 
remaining 2014 Impaired Rigs were sold in 2015. 

We did not record an impairment loss during the year ended December 31, 2013.    

58 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
See Notes 1 and 9. 

3.  Supplemental Financial Information    

Consolidated Balance Sheet Information 

Accounts receivable, net of allowance for bad debts, consists of the following: 

Trade receivables .................................................................................... 
Value added tax receivables .................................................................... 
Amounts held in escrow .......................................................................... 
Interest receivable ................................................................................... 
Related party receivables ........................................................................ 
Other ....................................................................................................... 

Allowance for bad debts ......................................................................... 
          Total .............................................................................................. 

December 31,  

2015 

2014 

(In thousands) 

  $ 

390,429 
14,475 
4,966 
336 
 167 
721 
             411,094 
              (5,724) 
405,370 
  $ 

  $ 

437,017 
24,853 
6,450 
317 
 339 
610 
             469,586 
              (5,724) 
463,862 
  $ 

An analysis of the changes in our provision for bad debts for each of the three years ended December 31, 2015, 

2014 and 2013, is as follows: 

2015 

For the Year Ended December 31,  
2014 
(In thousands) 

2013 

Allowance for bad debts, beginning of year ...................  
  Bad debt expense: 

  Provision for bad debts ..........................................  
  Recovery of bad debts ...........................................  
Total bad debt expense (recovery) ....................  
  Write off of uncollectible accounts against reserve.....  
  Other (1) .......................................................................  
 Allowance for bad debts, end of year .............................  

  $ 

5,724 

  $ 

27,340 

  $ 

5,458 

-- 
-- 
-- 
-- 
-- 
5,724 

  $ 

-- 
-- 
-- 
(21,148) 
(468) 
5,724 

22,513 
                     -- 
22,513 
 (509) 
(122) 
27,340 

  $ 

  $ 

(1) Includes revaluation adjustments for non-U.S. dollar denominated receivables, which have been recorded 

as “Foreign currency transaction gain (loss)” in our Consolidated Statements of Operations. 

See Note 8 for a discussion of our provision for bad debts and write off of uncollectible accounts against the 

reserve. 

59 

 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
            
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
 
   
   
 
 
   
   
   
   
   
   
   
   
   
 
Prepaid expenses and other current assets consist of the following: 

December 31,  

2015 

2014 

(In thousands) 

Rig spare parts and supplies ..................................................................  
Deferred mobilization costs ..................................................................  
Prepaid insurance ..................................................................................  
Deferred tax assets (1) ............................................................................  
Prepaid taxes .........................................................................................  
Other .....................................................................................................  
          Total ............................................................................................  

  $ 
42,804 
                52,965 
4,483 
-- 
14,969 
4,258 
119,479 

  $ 

  $ 
56,315 
                53,206 
12,163 
15,612 
44,085 
4,160 
185,541 

  $ 

(1)    We  have  elected  to  early  adopt  the  provisions  of  ASU  2015-17  and  are  prospectively  applying  the 
classification requirements  as  of  the  beginning  of 2015.   Our  Consolidated  Balance Sheet  at  December  31, 
2014 has not been retrospectively adjusted.  See Notes 1 and 15. 

Accrued liabilities consist of the following: 

December 31,  

2015 

2014 

(In thousands) 

Rig operating expenses .........................................................................  
Payroll and benefits ..............................................................................  
Deferred revenue...................................................................................  
Accrued capital project/upgrade costs ..................................................  
Interest payable .....................................................................................  
Personal injury and other claims ...........................................................  
FOREX contracts ..................................................................................  
Other .....................................................................................................  
          Total ............................................................................................  

  $ 

47,426 
59,787 
31,542 
84,146 
18,365 
8,320 
-- 
                4,183 
253,769 
  $ 

  $ 

85,897 
131,664 
63,209 
103,123 
18,365 
8,570 
5,439 
               10,325 
426,592 
  $ 

Consolidated Statement of Cash Flows Information 

Noncash investing activities excluded from the Consolidated Statements of Cash Flows and other supplemental 

cash flow information is as follows: 

Accrued but unpaid capital expenditures at period end ...........   $ 
Income tax benefits related to exercise of stock options .........  
Common stock withheld for payroll tax obligations (1) ...........  
Cash interest payments (2) ........................................................  
Cash income taxes paid (refunded), net: 
  U.S. federal ........................................................................  
  Foreign ...............................................................................  
  State ...................................................................................  

2015 

84,146 
-- 
236 
110,412 

(21,751) 
69,697 
58 

December 31, 
2014 
(In thousands) 
103,123 
$ 
1,458 
                  -- 
133,784 

2013 

$ 

86,274 
1,081 
                 -- 
82,938 

-- 
92,049 
(18) 

62,000 
78,041 
190 

(1)  Represents the cost of 7,810 shares of common stock withheld to satisfy the payroll tax obligation incurred as 
a  result  of  the  vesting  of  restricted  stock  units  in  the  first  quarter  of  2015.    This  cost  is  presented  as  a 
deduction from stockholders’ equity in “Treasury stock” in our Consolidated Balance Sheets at December 31, 
2015. 
Interest  payments,  net  of  amounts  capitalized,  were  $94.7  million,  $73.2  million  and  $16.5  million  for  the 
years ended December 31, 2015, 2014 and 2013, respectively. 

(2) 

60 

 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
 
   
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4.  Stock-Based Compensation  

We  have  an  Equity  Incentive  Compensation  Plan,  or  Equity  Plan,  for  our  (a)  employees,  (b)  independent 
contractors  and  (c)  non-employee  directors,  which  is  designed  to  encourage  stock  ownership  by  such  persons, 
thereby  aligning  their  interests  with  those  of  our  stockholders  and  to  permit  the  payment  of  performance-based 
compensation as defined by the Internal Revenue Code of 1986, as amended, or the Code.  Under the Equity Plan, 
we may grant both time-vesting and performance-vesting awards, which are earned on the achievement of certain 
performance criteria.  The following types of awards may be granted under the Equity Plan:  

(cid:120)  Stock options (including incentive stock options and nonqualified stock options); 
(cid:120)  Stock appreciation rights, or SARs; 
(cid:120)  Restricted stock; 
(cid:120)  Restricted stock units, or RSUs; 
(cid:120)  Performance shares or units; and 
(cid:120)  Other stock-based awards (including dividend equivalents). 

A maximum of 7,500,000 shares of our common stock is available for the grant or settlement of awards under 
the Equity Plan, subject to adjustment for certain business transactions and changes in capital structure.  Vesting 
conditions  and  other  terms  and  conditions  of  awards  under  the  Equity  Plan  are  determined  by  our  Board  of 
Directors or the compensation committee of our Board of Directors, subject to the terms of the Equity Plan. RSUs 
may be issued with performance-vesting or time-vesting features.  Except for RSUs issued to our CEO, RSUs are 
not participating securities, and the holders of such awards have no right to receive regular dividends if or when 
declared. 

Total  compensation  cost  recognized  for  all  awards  under  the  Equity  Plan  (or  its  predecessor)  for  the  years 
ended  December  31,  2015,  2014  and  2013  was  $5.7  million,  $5.0  million  and  $3.9  million,  respectively.    Tax 
benefits recognized for the years ended December 31, 2015, 2014 and 2013 related thereto were $1.9 million, $1.4 
million  and  $1.3  million,  respectively.    As  of  December  31,  2015  there  was  $9.3  million  of  total  unrecognized 
compensation  cost  related  to  nonvested  awards  under  the  Equity  Plan,  which  we  expect  to  recognize  over  a 
weighted average period of two years. 

Time-Vesting Awards 

SARs.  SARs awarded under the Equity Plan generally vest ratably over a four-year period and expire in ten 
years.  The exercise price per share of SARs awarded under the Equity Plan may not be less than the fair market 
value of our common stock on the date of grant.   

The  fair  value  of  SARs  granted  under  the  Equity  Plan  (or  its  predecessor)  during  each  of  the  years  ended 
December  31,  2015,  2014  and  2013  was  estimated  using  the  Black  Scholes  pricing  model  with  the  following 
weighted average assumptions: 

Expected life of SARs (in years) .............................  
Expected volatility ..................................................  
Dividend yield .........................................................  
Risk free interest rate ..............................................  

Year Ended December  31, 
2014 
7 

2013 
7 
18.24% 
.75% 
1.61% 

21.68% 
1.10% 
2.08% 

2015 
6 
55.12% 
1.70% 
1.66% 

The expected life of SARs is based on historical data as is the expected volatility.  The dividend yield is based 
on the current approved regular dividend rate in effect and the current market price at the time of grant.  Risk free 
interest rates are determined using the U.S. Treasury yield curve at time of grant with a term equal to the expected 
life of the SARs. 

61 

 
 
 
 
 
 
 
 
 
 
 
    
    
    
 
 
 
 
 
 
 
 
 
 
A summary of SARs activity under the Equity Plan as of December 31, 2015 and changes during the year 

then ended is as follows: 

Awards outstanding at January 1, 2015 ........  
Granted ................................................  
Exercised .............................................  
Forfeited ..............................................  
Expired ................................................  

Awards outstanding at December 31, 2015 ..  

Number of 
Awards 
   1,587,330 
     124,250  
              --    
       42,901  
     127,248 
  1,541,431  

Weighted-
Average 
Exercise Price 
  $  73.03 
  $     31.67 
  $         -- 
     $     52.17 
     $     72.07 
  $     70.36 

Awards exercisable at December 31, 2015 ...  

  1,316,849 

  $      73.52 

Weighted-Average 
Remaining 
Contractual Term 
(Years) 

Aggregate 
Intrinsic Value 
(In Thousands) 

5.6 

5.2 

  $ 

  $ 

58 

58 

The weighted-average grant date fair values per share of awards granted during the years ended December 31, 
2015, 2014 and 2013 were $14.44, $10.40 and $13.74, respectively.  The total intrinsic value of awards exercised 
during  the  years  ended  December  31,  2015,  2014  and  2013  was  $0,  $169,000  and  $162,000,  respectively.  The 
total fair value of awards vested during the years ended December 31, 2015, 2014 and 2013 was $3.6 million, $4.5 
million and $4.1 million, respectively.   

Restricted Stock Units.  RSUs are contractual rights to receive shares of our common stock in the future if the 
applicable vesting  conditions  are  met.    In April 2015, we granted 153,493 time-vesting RSUs, one half of which 
will vest on April 1, 2017 and the remaining 50% of which will vest on April 1, 2018, conditioned upon continued 
employment through the applicable vesting date.  The fair value of time-vesting RSUs granted under the Equity Plan 
in  2015  was  estimated  based  on  the  fair  market  value  of  our  common  stock  on  the  date  of  grant,  discounted  at  a 
three-year risk-free interest rate of 1.48%, as consideration of the non-participative rights of the awards. 

A summary of activity for time-vesting RSUs under the Equity Plan as of December 31, 2015 and changes 

during the year then ended is as follows: 

Nonvested awards at January 1, 2015 ...........  
Granted ................................................  
Vested ..................................................  
Forfeited ..............................................  
Nonvested awards at December 31, 2015 .....  

Number of 
Awards 

-- 
   153,493 
-- 
         3,879 
   149,614 

Weighted-
Average 
Grant Date 
Fair Value 
Per Share 

-- 

  $ 
  $  25.09      
  $ 
  $  25.21 
  $  25.09 

-- 

No time-vesting RSUs vested during the year ended December 31, 2015.  

Performance-Vesting Awards 

Restricted Stock Units.  In April 2015, we granted an aggregate 169,312 in performance-vesting RSUs, which 
will  vest  upon achievement  of  certain  performance  goals  as  set  forth  in  the  individual  award  agreements  over  the 
performance period from January 1, 2015 to December 31, 2017.  The shares of our common stock to be received 
upon the vesting of the performance-vesting RSUs will be delivered no later than March 15, 2018. The fair value of 
performance-vesting RSUs granted under the Equity Plan to employees other than our CEO was estimated based on 
the fair market value of our common stock on the date of grant, discounted at a three-year risk-free interest rate of 
1.48%.  The fair value of performance-vesting RSUs granted to our CEO in 2015 was not discounted as such awards 
are participating securities. 

In  2014,  we  awarded  55,661  targeted  performance  RSUs,  with  a  volume  weighted  average  price  of  our 
common stock preceding the grant date of $46.99 per share, including 3,080 in RSUs credited upon payment of 
cash dividends in 2014, to our CEO in connection with his commencement of service with us in March 2014.  The 

62 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
          
 
 
 
 
 
 
  
 
RSUs awarded to our CEO in 2014 will vest in one-third increments annually, over three years, commencing on 
the first anniversary of his hire date, conditioned upon continued employment through the applicable vesting date.   

A  summary  of  activity  for  performance-vesting  RSUs under  the  Equity  Plan  as  of December 31, 2015  and 

changes during the year then ended is as follows: 

Nonvested awards at January 1, 2015 ...........  
Granted ................................................  
Vested ..................................................  
Forfeited ..............................................  

Nonvested awards at December 31, 2015 .....  

Weighted-
Average Grant 
Date Fair 
Value Per 
Share 
  $  46.99 
  $     26.19 
  $  46.94 
     $         -- 
  $     29.93 

Number of 
Awards 
       55,661 
     169,312  
       18,617  
              -- 
     206,356  

The total grant date fair value of the performance-vesting RSUs that vested during the years ended December 

31, 2015 and 2014 was $0.6 million and $0, respectively. 

5. Earnings Per Share 

A  reconciliation  of  the  numerators  and  the  denominators  of  the  basic  and  diluted  per-share  computations 

follows: 

Year Ended December 31, 
2015 
2013 
2014 
(In thousands, except per share data) 

Net (loss) income – basic and diluted (numerator): 

 $    (274,285)      $       387,011 

 $       548,686 

Weighted-average shares – basic (denominator): 

          137,157              137,473              139,035   

    Dilutive effect of stock-based awards ...................................  
Weighted-average shares including conversions – diluted     

                   --                         50                       29   

(denominator):     

(Loss) earnings per share: 

          137,157 

          137,523 

          139,064 

 Basic ........................................................................................  
 Diluted ....................................................................................  

  $          (2.00) 
  $          (2.00) 

  $            2.82 
  $            2.81 

  $            3.95 
  $            3.95 

The  following  table  sets  forth  the  share  effects  of  stock-based  awards  excluded  from  our  computations  of 
diluted  earnings  per  share,  or  EPS,  as  the  inclusion  of  such  potentially  dilutive  shares  would  have  been 
antidilutive for the periods presented:    

Employee and director: 
  Stock options............................................................  
  SARs ........................................................................  
  RSUs ........................................................................  

6. Marketable Securities 

2015 

Year Ended December 31, 
2014 
(In thousands) 

2013 

26 
1,553 
278 

37 
1,488 
-- 

18 
956 
-- 

We report our investments in marketable securities as current assets in our Consolidated Balance Sheets in 

“Marketable securities,” representing the investment of cash available for current operations.  See Note 8.     

63 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Our investments in marketable securities are classified as available for sale and are summarized as follows: 

Amortized 
Cost 

December 31, 2015 
Unrealized 
Gain (Loss) 
(In thousands) 

Market 
Value 

Corporate bonds ........................................................................  
Mortgage-backed securities ......................................................  
Total ..................................................................................  

$         16,480 
       77 
16,557 

$  

$          (5,042) 
         3 
$          (5,039) 

$ 

$ 

11,438 
       80 
11,518 

Amortized 
Cost 

December 31, 2014 
Unrealized 
Gain (Loss) 
(In thousands) 

Market 
Value 

 Corporate bonds .......................................................................  
 Mortgage-backed securities .....................................................  
Total ..................................................................................  

$         16,003 
       130 
16,133 

$  

$            (104) 
         4 
$            (100) 

$ 

$ 

15,899 
       134 
16,033 

Based  on  current  facts  and  circumstances,  we  believe  that  the  unrealized  losses  on  our  investments  in 
corporate bonds presented in the tables above are not indicative of the ultimate collectability of these investments, 
but are primarily related to the financial market’s perception of the current downturn in the bond issuer’s industry 
(oil  and  gas  market  and  contract  drilling  industry).    We  have  no  current  intent  to  sell  these  securities,  nor  is  it 
more likely than not that we will be required to sell these investments prior to their maturity.  Therefore, we do 
not consider the unrealized losses at December 31, 2015 and 2014 associated with our investments in corporate 
bonds to be other than temporary. 

Proceeds from maturities and sales of marketable securities and gross realized gains and losses are 

summarized as follows: 

Year Ended December 31, 

2015 

2014 

2013 

(In thousands) 

Proceeds from maturities .................................................   $ 
Proceeds from sales .........................................................  

-- 
51  

$  8,000,000 
57   

$  4,650,000 
85   

Gross realized gains and losses from the sale of marketable securities for each of the three years ended 

December 31, 2015, 2014 and 2013 were not significant. 

7. Derivative Financial Instruments 

Foreign Currency Forward Exchange Contracts 

Our international operations expose us to foreign exchange risk associated with our costs payable in foreign 
currencies for employee compensation, foreign income tax payments and purchases from foreign suppliers. From 
time  to  time,  we  may  utilize  FOREX  contracts  to  manage  our  foreign  exchange  risk.    Our  FOREX  contracts 
generally require us to net settle the spread between the contracted foreign currency exchange rate and the spot 
rate  on  the  contract  settlement  date,  which,  for  most  of  our  contracts,  is  the  average  spot  rate  for  the  contract 
period. 

  We enter into FOREX contracts when we believe market conditions are favorable to purchase contracts for 
future  settlement  with  the  expectation  that  such  contracts,  when  settled,  will  reduce  our  exposure  to  foreign 
currency gains and losses on future foreign currency expenditures.  The amount and duration of such contracts is 
based on our monthly forecast of expenditures in the significant currencies in which we do business and for which 
there is a financial market.  Historically we have entered into FOREX contracts for future delivery of Australian 
dollars, Brazilian reais, British pounds sterling, Mexican pesos and Norwegian kroner.  These forward contracts 
are derivatives as defined by GAAP. 

64 

 
 
 
 
 
 
 
 
       
      
      
 
 
 
 
 
 
 
 
 
       
      
      
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
During  the  years  ended  December  31,  2015,  2014  and  2013,  we  settled  FOREX  contracts  with  aggregate 
notional  values  of  approximately  $91.6  million,  $304.7  million  and  $307.4  million,  respectively,  of  which  the 
entire aggregate amounts were designated as an accounting hedge.  During the years ended December 31, 2015, 
2014  and  2013,  we  did  not  enter  into  or  settle  any  FOREX  contracts  that  were  not  designated  as  accounting 
hedges.  There were no FOREX contracts outstanding at December 31, 2015. 

The following table presents the aggregate amount of gain or loss recognized in our Consolidated Statements 
of Operations related to our FOREX contracts designated as hedging instruments for the years ended December 
31, 2015, 2014 and 2013. 

Location of Gain (Loss) Recognized in Income 

Amount of Gain (Loss) Recognized in Income 
For the Years Ended December 31, 
2014 
2015 
(In thousands) 

2013 

Contract drilling expense .........................................................  

$         (8,364)   $        3,275   $  

(6,501) 

The  following  table  presents  the  fair  values  of  our  derivative  FOREX  contracts  designated  as  hedging 

instruments at December 31, 2015 and 2014. 

Balance Sheet Location 

Fair Value 

Balance Sheet Location 

Fair Value 

December 31,    
2015 

December 31, 
2014 

(In thousands) 

December 31, 
2015 

December 31, 
2014 

(In thousands) 

Prepaid  expenses  and 
other current assets 

$              -- 

$ 

-- 

Accrued liabilities 

 $      

-- 

$ 

(5,439) 

The following table presents the amounts recognized in our Consolidated Balance Sheets and Consolidated 
Statements  of  Operations  related  to  our  derivative  financial  instruments  designated  as  cash  flow  hedges  for  the 
years ended December 31, 2015, 2014 and 2013. 

2015 

For the Year Ended December 31, 
2014 
(In thousands) 

2013 

FOREX contracts: 

Amount of (loss) gain recognized in AOCGL on 
derivative (effective portion) ......................................  

Location of (loss) gain reclassified from AOCGL 
into income (effective portion) ...................................  
Amount of (loss) gain reclassified from AOCGL into 
income (effective portion) ...........................................  
Location of loss recognized in income on derivative 
(ineffective portion and amount excluded from 
effectiveness testing) ...................................................  
Amount of loss recognized in income on derivative 
(ineffective portion and amount excluded from 
effectiveness testing) ...................................................  

$  

(2,420) 
Contract drilling, 
excluding 
depreciation 

$  
(2,281) 
Contract drilling, 
excluding 
depreciation 

(10,542) 

$  
Contract drilling, 
excluding 
depreciation 

$  

(7,829) 

$  

3,650  $  

(7,449) 

Foreign currency 
transaction gain 
(loss) 

Foreign currency 
transaction gain 
(loss) 

Foreign currency 
transaction gain 
(loss) 

$  

(1) 

$  

(31) 

$ 

(104) 

During the years ended December 31, 2015, 2014 and 2013, we did not reclassify any amounts from AOCGL 

due to the probability of an underlying forecasted transaction not occurring. 

8. Financial Instruments and Fair Value Disclosures 

Concentrations of Credit and Market Risk 

Financial instruments that potentially subject us to significant concentrations of credit or market risk consist 
primarily  of  periodic  temporary  investments  of  excess  cash,  trade  accounts  receivable  and  investments  in  debt 

65 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
securities,  including  mortgage-backed  securities.    We  generally  place  our  excess  cash  investments  in  U.S. 
government  backed  short-term  money  market  instruments  through  several  financial  institutions.   At times,  such 
investments may be in excess of the insurable limit.  We periodically evaluate the relative credit standing of these 
financial institutions as part of our investment strategy.  

Most of our investments in debt securities are securitized corporate bonds whereby our credit risk is mitigated 
by  the  collateral.    However,  we  are  exposed  to  market  risk  due  to  price  volatility  associated  with  interest  rate 
fluctuations.  

Concentrations  of  credit  risk  with  respect  to  our  trade  accounts  receivable  are  limited  primarily  due  to  the 
entities comprising our customer base.  Since the market for our services is the offshore oil and gas industry, this 
customer  base  consists  primarily  of  major  and  independent  oil  and  gas  companies  and  government-owned  oil 
companies.  Based  on  our  current  customer  base  and  the  geographic  areas  in  which  we  operate,  as  well  as  the 
number  of  rigs  currently  working  in  a  geographic  area,  we  do  not  believe  that  we  have  any  significant 
concentrations of credit risk at December 31, 2015.  

In general, before working for a customer with whom we have not had a prior business relationship and/or 
whose  financial  stability  may  be  uncertain  to  us,  we  perform  a  credit  review  on  that  company.    Based  on  that 
analysis, we may require that the customer present a letter of credit, prepay or provide other credit enhancements.  
We record a provision for bad debts on a case-by-case basis when facts and circumstances indicate that a customer 
receivable  may  not  be  collectible  and,  historically,  losses  on  our  trade  receivables  have  been  infrequent 
occurrences.   

During  2013,  based  on  our  assessment  of  the  financial  condition  of  two  of  our  customers,  Niko  Resources 
Ltd., or Niko, and OGX Petróleo e Gás Ltda. (a privately owned Brazilian oil and natural gas company that filed 
for bankruptcy in October 2013), or OGX, and our expectations at the time regarding the probability of collection 
of amounts due to us from them, we recorded $22.5 million in bad debt expense to fully reserve all outstanding 
receivables owed to us.     

In December 2013, we entered into a settlement agreement with Niko, or the Niko Settlement, whereby Niko 
will  be  released  from  certain  obligations  under  the  dayrate  contracts  for  the  Ocean  Monarch  and  Ocean 
Lexington, subject to and effective upon the full payment of amounts owed to us under the Niko Settlement and 
subject to its other conditions.  In accordance with the terms of the Niko Settlement, we received cash payments 
of $20.3  million during 2014  and $25.0  million  in  the  fourth  quarter  of  2013,  which  we  recognized  as  revenue 
against invoices due us.  Niko is further obligated to make future periodic payments to us pursuant to the Niko 
Settlement  totaling  an  aggregate  of  $34.8  million,  payable  at  various  times  through  December  2016.    In  2015, 
Niko failed to make required payments and perform certain other obligations under the settlement agreement, so 
we  filed  suit  seeking  payment  of  the  overdue  amounts  and  requiring  Niko  to  perform  its  other  contractual 
obligations.  We plan to recognize these amounts in revenue as they are received due to the uncertainty regarding 
their timing and collection.   

In 2014, the creditors of OGX, including us, agreed to a settlement whereby the creditors granted us shares of 
the  reorganized  OGX  company  in  full  settlement  of  obligations  owed  to  them  by  OGX.    As  a  result  of  the 
settlement, we have written off $21.2 million in receivables due us from OGX against the associated allowance 
for bad debts, which was set up in 2013.  See Note 3. 

Fair Values 

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability 
(an  exit  price)  in  the  principal  or  most  advantageous  market  for  the  asset  or  liability  in  an  orderly  transaction 
between market participants on the measurement date. The fair value hierarchy prescribed by GAAP requires an 
entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair 
value. There are three levels of inputs that may be used to measure fair value:  

 Level 1  Quoted prices for identical instruments in active markets. Level 1 assets include short-term investments 
such as money market funds, U.S. Treasury Bills and Treasury notes.  Our Level 1 assets at December 
31,  2015  consisted  of  cash  held  in  money  market  funds  of  $85.2  million  and  time  deposits  of  $20.4 
million.    Our  Level  1  assets  at  December  31,  2014  consisted  of  cash  held  in  money  market  funds  of 
$197.5 million and time deposits of $20.3 million.   

66 

 
 
 
 
 
 
 
 
 
 
  
 
Level  2  Quoted  market  prices  for  similar  instruments  in  active  markets;  quoted  prices  for  identical  or  similar 
instruments in markets that are not active; and model-derived valuations in which all significant inputs 
and  significant  value  drivers  are  observable  in  active  markets.    Level  2  assets  and  liabilities  include 
residential  mortgage-backed  securities,  corporate  bonds  purchased  in  a  private  placement  offering  and 
over-the-counter  FOREX  contracts.    Our  residential  mortgage-backed  securities  and  corporate  bonds 
were  valued  using  a  model-derived  valuation  technique  based  on  the  quoted  closing  market  prices 
received from a financial institution.  Our FOREX contracts were valued based on quoted market prices, 
which are derived from observable inputs including current spot and forward rates, less the contract rate 
multiplied  by  the  notional  amount.    The  inputs  used  in  our  valuation  are  obtained  from  a  Bloomberg 
curve  analysis  which  uses  par  coupon  swap  rates  to  calculate  implied  forward  rates  so  that  projected 
floating  rate  cash  flows  can  be  calculated.  The  valuation  techniques  underlying  the  models  are  widely 
accepted in the financial services industry and do not involve significant judgment. 

Level 3  Valuations derived from valuation techniques in which one or more significant inputs or significant value 
drivers  are  unobservable.    Level  3  assets  and  liabilities  generally  include  financial  instruments  whose 
value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as 
well as instruments for which the determination of fair value requires significant management judgment 
or estimation or for which there is a lack of transparency as to the inputs used.  Our Level 3 assets at 
December 31, 2015 and 2014 consisted of nonrecurring measurements of certain of our drilling rigs for 
which we recorded an impairment loss during the years ended December 31, 2015 and 2014.  See Notes 
1 and 2. 

Market  conditions  could  cause  an  instrument  to  be  reclassified  among  Levels 1,  2  and  3.    Our  policy 
regarding  fair  value  measurements  of  financial  instruments  transferred  into  and  out  of  levels  is  to  reflect  the 
transfers as having occurred at the beginning of the reporting period.  There were no transfers between fair value 
levels during the years ended December 31, 2015 and 2014.  

  Certain  of  our  assets  and  liabilities  are  required  to  be  measured  at  fair  value  on  a  recurring  basis  in 
accordance with GAAP.  In addition, certain assets and liabilities may be recorded at fair value on a nonrecurring 
basis.  Generally,  we  record  assets  at  fair  value  on  a  nonrecurring  basis  as  a  result  of  impairment  charges.  We 
recorded  impairment  charges  related  to  our  2015  Impaired  Rigs  and  our  2014  Impaired  Rigs,  which  were 
measured at fair value on a nonrecurring basis in 2015 and 2014, respectively, and have presented the aggregate 
loss in “Impairment of assets” in our Consolidated Statements of Operations for the years ended December 31, 
2015 and 2014.   

Fair Value Measurements Using 

December 31, 2015 

Level 1 

Level 2 

Level 3 

(In thousands) 

Assets at Fair 
Value 

Total Losses 
 for Year 
Ended (1)  

Recurring fair value 
measurements: 
Assets: 
  Short-term investments ............. $      105,659 
-- 
  Corporate bonds .......................
-- 
  Mortgage-backed securities ......
105,659 

Total assets .......................... $ 

Nonrecurring fair value 
measurements: 
Assets: 

                       --  $ 

11,438 
80 
              11,518 

$    

-- 
-- 
-- 
         -- 

$        105,659 
            11,438 
          80 
117,177 

$ 

Impaired assets (2)(3) .................. $                 --  $                    -- 

$ 

189,600 

$ 

189,600 

$ 

860,441 

(1)  Represents  the  aggregate  impairment  loss  recognized  for  the  year  ended  December  31,  2015  related  to  our 

2015 Impaired Rigs.   

(2)  Represents  the  book  value  of  our  2015  Impaired  Rigs,  which  were  written  down  to  their  estimated 
recoverable amounts during 2015, of which $14.2 million and $175.4 million were reported as “Assets Held 
for Sale” and “Drilling and other property and equipment, net of accumulated depreciation,” respectively, in 
our Consolidated Balance Sheets at December 31, 2015. 

67 

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
  
  
      
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(3)  Excludes  five  rigs  with  an  aggregate  fair  value  of  $2.4  million,  which  were  impaired  in  2015,  but  were 

subsequently sold for scrap during the year. 

Fair Value Measurements Using 

December 31, 2014 

Level 1 

Level 2 

Level 3 

(In thousands) 

Assets at Fair 
Value 

Total Losses 
 for Year 
Ended  

Recurring fair value 
measurements: 
Assets: 
  Short-term investments ............. $      217,789 
-- 
  Corporate bonds .......................
-- 
  Mortgage-backed securities ......

Total assets .......................... $ 

$                 -- 

$ 

15,899 
134 
217,789  $            16,033 

$    

-- 
-- 
-- 
         -- 

$   
    217,789 
            15,899 
                 134 
233,822 
$ 

Liabilities: 
  FOREX contracts...................... $                 --  $            (5,439)   $    

         -- 

$ 

(5,439)   

Nonrecurring fair value 
measurements: 
Assets: 

Impaired assets (1) ..................... $                 --  $                    -- 

$ 

9,421 

$             9,421  $109,462 

(1)  Represents the book value as of December 31, 2014 of four of our 2014 Impaired Rigs, which were written 
down to their estimated recoverable amounts in September 2014 and had not yet been scrapped.  All of these 
rigs were sold during 2015. 

We believe that the carrying amounts of our other financial assets and liabilities (excluding long-term debt), 
which  are  not  measured  at  fair  value  in  our  Consolidated  Balance  Sheets,  approximate  fair  value  based  on  the 
following assumptions: 

(cid:120) 

(cid:120) 

(cid:120) 

Cash  and  cash  equivalents  --  The  carrying  amounts  approximate  fair  value  because  of  the  short 
maturity of these instruments. 
Accounts  receivable  and  accounts  payable  --  The  carrying  amounts  approximate  fair  value  based  on 
the nature of the instruments. 
Commercial  paper  --  The  carrying  amounts  approximate  fair  value  because  of  the  short  maturity  of 
these instruments. 

 We  consider  our  senior  notes,  including  current  maturities,  to  be  Level  2  liabilities  under  the  GAAP  fair 
value hierarchy and, accordingly, the fair value of our senior notes was derived using a third-party pricing service 
at  December  31,  2015  and  2014.    We  perform  control  procedures  over  information  we  obtain  from  pricing 
services  and  brokers  to  test  whether  prices  received  represent  a  reasonable  estimate  of  fair  value.  These 
procedures  include  the  review  of  pricing  service  or  broker  pricing  methodologies  and  comparing  fair  value 
estimates to actual trade activity executed in the market for these instruments occurring generally within a 10-day 
window of the report date.  Fair values and related carrying values of our senior notes (see Note 10) are shown 
below. 

December 31, 2015 

December 31, 2014 

Fair Value 

Carrying Value 

Fair Value 

Carrying Value 

(In millions) 

4.875% Senior Notes due 2015 ........  
5.875% Senior Notes due 2019 ........  
3.45% Senior Notes due 2023 ..........  
5.70% Senior Notes due 2039 ..........  
4.875% Senior Notes due 2043 ........  

$ 

-- 
506.8 
208.0 
360.0 
455.3 

$ 

-- 
499.7 
249.2 
497.0 
748.9 

$ 

255.0 
544.9 
232.0 
478.5 
638.9 

$ 

250.0 
499.6 
249.1 
497.0 
748.8 

We have estimated the fair value amounts by using appropriate valuation methodologies and information 
available to management.  Considerable judgment is required in developing these estimates, and accordingly, no 

68 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
assurance can be given that the estimated values are indicative of the amounts that would be realized in a free 
market exchange.   

9. Drilling and Other Property and Equipment 

Cost and accumulated depreciation of drilling and other property and equipment are summarized as follows: 

December 31, 

2015 

2014   

(In thousands) 

Drilling rigs and equipment ..............................................................  
Construction work-in-progress .........................................................  
Land and buildings ............................................................................  
Office equipment and other...............................................................  
          Cost .........................................................................................  
Less accumulated depreciation .........................................................  
          Drilling and other property and equipment, net ......................  

$ 

$ 

9,345,484 
269,605 
64,775 
71,537 
9,751,401 
(3,372,587) 
6,378,814 

$ 

$ 

10,555,314 
439,206 
66,989 
70,591 
11,132,100 
(4,186,147) 
6,945,953 

During  the  year  ended  December  31,  2015,  we  recognized  an  impairment  loss  of  $860.4  million  and 
transferred $14.2 million net book value of five of our non-working jack-up rigs to “Assets held for sale” in our 
Consolidated  Balance  Sheet  at  December  31,  2015.  In  addition,  we  sold  nine  rigs  with  an  aggregate  net  book 
value of $5.2 million and recognized an aggregate gain on disposition of $3.5 million. See Notes 1 and 2.  

Construction work-in-progress, including capitalized interest, at December 31, 2015 and 2014 is summarized 

as follows: 

Ultra-deepwater drillships - Ocean BlackLion ..................................  
Ultra-deepwater semisubmersible - Ocean GreatWhite ....................  
      Total construction work-in-progress .........................................  

$ 

$ 

-- 
269,605 
269,605 

$ 

$ 

225,405 
213,801 
439,206 

The Ocean BlackLion was placed in service in June 2015 and is no longer reported as construction work-in-

December 31, 

2015 

2014 

(In thousands) 

progress at December 31, 2015.  See Note 12. 

10. Credit Agreement and Senior Notes 

Credit Agreement 

  We  have  a  syndicated  revolving  credit  agreement  with  Wells  Fargo  Bank,  National  Association,  as 
administrative agent and swingline lender, which provides for a $1.5 billion senior unsecured revolving credit facility 
for general corporate purposes, or the Credit Agreement.  Effective October 22, 2015, we entered into an extension 
agreement  and  fourth  amendment  to  our  Credit  Agreement,  which,  among  other  things,  provided  for  a  one-year 
extension of the maturity date for most of the lenders.  As so extended, our Credit Agreement matures on October 22, 
2020, except for $40 million of commitments that mature on March 17, 2019 and $60 million of commitments that 
mature on October 22, 2019.  In addition, we also have the option to increase the revolving commitments under the 
Credit Agreement by up to an additional $500 million from time to time, upon receipt of additional commitments 
from  new  or  existing  lenders,  and  to  request  one  additional  one-year  extension  of  the  maturity  date.    The  entire 
amount of the facility is available, subject to its terms, for revolving loans.  Up to $250 million of the facility may be 
used  for  the  issuance  of  performance  or  other  standby  letters  of  credit  and  up  to  $100  million  may  be  used  for 
swingline  loans.    At  December  31,  2015,  2014  and  2013,  there  were  no  amounts  outstanding  under  the  Credit 
Agreement. 

Revolving loans under the Credit Agreement bear interest, at our option, at a rate per annum based on either an 
alternate base rate, or ABR, or a Eurodollar Rate, as defined in the Credit Agreement, plus the applicable interest 
margin for an ABR loan or a Eurodollar loan.  The ABR is the greatest of (i) the prime rate, (ii) the federal funds rate 
plus 0.50% and (iii) the daily one-month Eurodollar Rate plus 1.00%.  The applicable interest margin for ABR loans 

69 

 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
varies  from  0%  to  0.25%.   The  applicable  interest  margin  for  Eurodollar  loans  varies  between  0.75%  and  1.25%.  
Based  on  our  current  credit  ratings,  the  applicable  interest  margin  is  0.125%  for  ABR  loans  and  1.125%  for 
Eurodollar loans. 

Swingline loans bear interest, at our option, at a rate per annum equal to (i) the ABR plus the applicable interest 
margin for ABR loans or (ii) the daily one-month Eurodollar Rate plus the applicable interest margin for Eurodollar 
loans.   

Under our Credit Agreement, we also pay, based on our current long-term credit ratings, and as applicable, other 
customary  fees  including,  but  not  limited  to,  a  commitment  fee  on  the  unused  commitments  under  the  Credit 
Agreement, varying between 0.06% and 0.20% per annum, and a fronting fee to the issuing bank for each letter of 
credit.  Participation fees for letters of credit are dependent upon the type of letter of credit issued, varying between 
0.375% and 0.625% per annum for performance letters of credit, and between 0.75% and 1.25% per annum for all 
other  letters  of  credit.    Based  on  our  current  credit  ratings,  the  applicable  commitment  fee  is  0.15%,  and  the 
participation fee for letters of credit is 0.5625%.  Changes in credit ratings could lower or raise the fees that we pay 
under the Credit Agreement.   

The  Credit  Agreement  contains  customary  covenants  including,  but  not  limited  to,  maintenance  of  a  ratio  of 
consolidated indebtedness to total capitalization, as defined in the Credit Agreement, of not more than 60% at the end 
of each fiscal quarter, as well as limitations on liens; mergers, consolidations, liquidation and dissolution; changes in 
lines of business; swap agreements; transactions with affiliates; and subsidiary indebtedness.  As of December 31, 
2015, we were in compliance with all covenant requirements. 

At  December  31,  2015  and  2014,  there  were  no  amounts  outstanding  under  the  Credit  Agreement.    As  of 
February  16,  2016,  we  had  $305.0  million  in  Eurodollar  loans  outstanding  under  the  Credit  Agreement  and  an 
additional $1.2 billion available. 

Commercial Paper  

In 2015, we established a commercial paper program with four commercial paper dealers pursuant to which we 
may  issue,  on  a  private  placement  basis,  unsecured  commercial  paper  notes  up  to  a  maximum  aggregate  amount 
outstanding at any time of $1.5 billion and, unless we change the terms of the program, the aggregate amount of 
commercial paper notes and total loans and letters of credit outstanding under the Credit Agreement at any time 
will not exceed $1.5 billion.  Proceeds from issuances under the commercial paper program may be used for general 
corporate purposes.  The maturities of the notes may vary, but may not exceed 397 days from the date of issuance.  
The notes will be issued, at our option, either at a discounted price to their principal face value or will bear interest, 
which may be at a fixed or floating rate, at rates that will vary based on market conditions and the ratings assigned by 
credit rating agencies at the time of issuance.  The notes are not redeemable or subject to voluntary prepayment by us 
prior to maturity.  Liquidity for our payment obligations in respect of the notes issued under the commercial paper 
program is provided under our Credit Agreement, and the aggregate amount of notes outstanding at any time will not 
exceed the amount available under the Credit Agreement.   

As  of  December  31,  2015,  we  had  $286.6  million  in  commercial  paper  notes  outstanding  with  a  weighted 
average interest rate of 0.86% and a weighted average remaining term of 5.8 days.  As of February 16, 2016, there 
were no commercial paper notes outstanding.   

Senior Notes 

At December 31, 2015, our senior notes were comprised of the following debt issues: 

Debt Issue 
5.875% Senior Notes due 2019 
3.45% Senior Notes due 2023 
5.70% Senior Notes due 2039 

Principal  
Amount 
(In millions) 
$500.0 
$250.0 
$500.0 

Maturity Date 
May 1, 2019 
November 1, 2023 
October 15, 2039 

Interest Rate 

Coupon 
5.875% 
3.45% 
5.70% 

Effective 
5.89% 
3.50% 
5.75% 

Semiannual 
Interest Payment 
Dates 
May 1 and November 1 
May 1 and November 1 
April 15 and October 15 

4.875% Senior Notes due 2043 

$750.0 

November 1, 2043 

4.875% 

4.89% 

May 1 and November 1 

70 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
At December 31, 2015 and 2014, the carrying value of our senior notes was as follows: 

4.875% Senior Notes due 2015 ...................................................  
5.875% Senior Notes due 2019 ...................................................  
3.45% Senior Notes due 2023 .....................................................  
5.70% Senior Notes due 2039 .....................................................  
4.875% Senior Notes due 2043 ...................................................  

December 31, 

2015 

2014 

$  

(In thousands) 
--  $  

499,705 
249,169 
497,030 
748,869 

249,962 
499,626 
249,077 
496,973 
748,850 

  Total senior notes, net of unamortized discount ......................  

$  

1,994,773  $  

2,244,488 

Less:  Current portion of long-term debt .....................................  
Total Long-term debt ........................................................  

-- 

$  

1,994,773  $  

249,962 
1,994,526 

As of December 31, 2015, the aggregate annual maturity of our senior notes was as follows: 

Year Ending December 31, 

Aggregate 
Principal 
Amount 
(In thousands) 

2016  ....................................................................................................................  
2017  ....................................................................................................................  
2018 .....................................................................................................................  
2019 .....................................................................................................................  
2020 .....................................................................................................................  
Thereafter  ............................................................................................................  

$ 

   Total maturities of senior notes ........................................................................  

Less:  unamortized discounts ...............................................................................  
   Total maturities of senior notes, net of unamortized discount ...........................  

$ 

-- 
-- 
-- 
500,000 
-- 
1,500,000 

2,000,000 

(5,227) 
1,994,773 

Senior Notes Due 2023 and 2043.  In 2013, we issued $1.0 billion aggregate principal amount of senior notes 
consisting  of $250.0  million  aggregate  principal  amount of  3.45%  senior  unsecured notes due  2023 and  $750.0 
million aggregate principal amount of 4.875% senior unsecured notes due 2043 or, collectively, the Senior Notes 
Due 2023 and 2043, for general corporate purposes, including redemption, repurchase or retirement of our 5.15% 
senior  notes  due  September  1,  2014  and  our  4.875%  senior  notes  due  July  1,  2015,  or  2015  Notes.    The 
transaction resulted in net proceeds to us of $987.8 million after deducting underwriting discounts, commissions 
and estimated expenses.   

The  Senior  Notes  Due  2023  and  2043  are  unsecured  and  unsubordinated  obligations  of  Diamond  Offshore 
Drilling, Inc., and rank equally in right of payment to all of its existing and future unsecured and unsubordinated 
indebtedness, and are effectively subordinated to all existing and future obligations of our subsidiaries.  We have 
the right to redeem all or a portion of the Senior Notes Due 2023 and 2043 for cash at any time or from time to 
time,  on  at  least  15  days  but  not  more  than  60  days  prior  written  notice,  at  a  make-whole  redemption  price 
specified in the governing indenture (if applicable) plus accrued and unpaid interest to, but excluding, the date of 
redemption.   

Senior Notes Due 2019 and 2039.  Our 5.875% Senior Notes due 2019 and 5.70% Senior Notes due 2039 are 
unsecured  and  unsubordinated  obligations  of  Diamond  Offshore  Drilling,  Inc.  and  rank  equally  in  right  of 
payment to its existing and future unsecured and unsubordinated indebtedness, and are effectively subordinated to 
all existing and future obligations of our subsidiaries.  We have the right to redeem all or a portion of these notes 
for cash at any time or from time to time, on at least 15 days but not more than 60 days prior written notice, at the 
redemption price specified in the governing indenture plus accrued and unpaid interest to the date of redemption.  

2015  Maturities.  On  July  1,  2015,  we  repaid  $250.0  million  in  aggregate  principal  amount  of  our  4.875% 
Senior Notes due July 1, 2015, primarily with funds obtained through the issuance of commercial paper.  These 
notes were presented as “Current portion of long-term debt” in our Consolidated Balance Sheet at December 31, 
2014. 

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11. Other Comprehensive Income (Loss)    

The  following  table  sets  forth  the  components  of  “Other  comprehensive  income  (loss)”  and  the  related 
income tax effects thereon for the three years ended December 31, 2015 and the cumulative balances in AOCGL 
by component at December 31, 2015, 2014 and 2013.    

Unrealized (Loss) Gain on 
Derivative 
Financial 
Instruments 

Marketable 
Securities 
(In thousands) 

Total 
AOCGL 

Balance at January 1, 2013 .........................................................................   $ 

2,350  $ 

146 

  $ 

2,496 

   Change  in  other  comprehensive  (loss)  gain  before  reclassifications, 
after tax of $3,682 and $18 ...................................................................  

  Reclassification adjustments for items included in Net Income, after tax 
of $(2,608) and $18 .............................................................................  

    Total other comprehensive (loss) income .............................................  

Balance at December 31, 2013 ...................................................................  

   Change  in  other  comprehensive  (loss)  gain  before  reclassifications, 
after tax of $799 and $(15) ...................................................................  

  Reclassification adjustments for items included in Net Income, after tax 
of $1,279 and $7 .................................................................................  

    Total other comprehensive (loss) income .............................................  

Balance at December 31, 2014 ...................................................................  

   Change  in  other  comprehensive  (loss)  gain  before  reclassifications, 
after tax of $846 and $(1) .....................................................................  

  Reclassification adjustments for items included in Net Income, after tax 
of $(2,737) and $0...............................................................................  

(6,833) 

(6) 

(6,839) 

4,840 

(1,993) 

357 

(147) 

(153) 

(7) 

4,693 

(2,146) 

350 

(1,482) 

(69) 

(1,551) 

(2,379) 

(3,861) 

(3,504) 

(25) 

(94) 

(101) 

(2,404) 

(3,955) 

(3,605) 

(1,574) 

(4,940) 

(6,514) 

5,084 

-- 

5,084 

    Total other comprehensive income (loss) .............................................  

            3,510 

           (4,940) 

         (1,430) 

Balance at December 31, 2015 ...................................................................   $                 6 

$ 

(5,041) 

  $ 

(5,035) 

The  following  table  presents  the  line  items  in  our  Consolidated  Statements  of  Operations  affected  by 

reclassification adjustments out of AOCGL. 

Major Components of AOCGL 

Year Ended December 31, 

Consolidated Statements of 
Operations Line Items 

Derivative financial instruments: 
Unrealized loss (gain) on FOREX contracts ........  $ 
Unrealized (gain) loss on Treasury Lock 
Agreements ..........................................................    

  $ 

2015 

2014 
(In thousands) 

2013 

7,829 

 $ 

(3,650)  $ 

7,449 

Contract drilling, excluding 
depreciation 

(8)     
(2,737)     
  $ 
5,084 

(8)    
1,279     
(2,379)   $ 

(1) 
(2,608) 

Interest expense 
Income tax expense 

4,840  Net of tax 

Marketable securities: 
Unrealized (gain) loss on marketable securities ...  $ 

  $ 

-- 
-- 
-- 

 $ 

  $ 

(32)  $ 
7     
(25)   $ 

(165)  Other, net 

18 

Income tax expense 

(147)  Net of tax 

12. Commitments and Contingencies 

Various  claims  have  been  filed  against  us  in  the  ordinary  course  of  business,  including  claims  by  offshore 
workers  alleging  personal  injuries.  With  respect  to  each  claim  or  exposure,  we  have  made  an  assessment,  in 
accordance with GAAP, of the probability that the resolution of the matter would ultimately result in a loss. When 

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we determine that an unfavorable resolution of a matter is probable and such amount of loss can be determined, 
we  record  a  liability  for  the  amount  of  the  estimated  loss  at  the  time  that  both  of  these  criteria  are  met.  Our 
management believes that we have recorded adequate accruals for any liabilities that may reasonably be expected 
to result from these claims.  

Asbestos Litigation. We are one of several unrelated defendants in lawsuits filed in Mississippi, Louisiana and 
Missouri  state  courts  alleging  that  defendants  manufactured,  distributed  or  utilized  drilling  mud  containing 
asbestos and, in our case, allowed such drilling mud to have been utilized aboard our offshore drilling rigs. The 
plaintiffs  seek,  among  other  things,  an  award  of  unspecified  compensatory  and  punitive  damages.  The 
manufacture and use of asbestos-containing drilling mud had already ceased before we acquired any of the drilling 
rigs  addressed  in  these  lawsuits.  We  believe  that  we  are  not  liable  for  the  damages  asserted  and  we  expect  to 
receive complete defense and indemnity from Murphy Exploration & Production Company with respect to many 
of the lawsuits pursuant to the terms of our 1992 asset purchase agreement with them. We also believe that we are 
not  liable  for  the  damages  asserted  in  the  remaining  lawsuits  pursuant  to  the  terms  of  our  1989  asset  purchase 
agreement with Diamond M Corporation, and we filed a declaratory judgment action in Texas state court against 
NuStar  Energy  LP,  or  NuStar,  and  Kaneb  Management  Co.,  L.L.C.,  or  Kaneb,  the  successors  to  Diamond  M 
Corporation, seeking a judicial determination that we did not assume liability for these claims. We are unable to 
estimate our potential exposure, if any, to these lawsuits at this time but do not believe that our ultimate liability, 
if any, resulting from this litigation will have a material effect on our consolidated financial condition, results of 
operations or cash flows.  

Other  Litigation.  We  have  been  named  in  various  other  claims,  lawsuits  or  threatened  actions  that  are 
incidental to the ordinary course of our business, including a claim by Petrobras that it will seek to recover from 
its contractors, including us, any taxes, penalties, interest and fees that it must pay to the Brazilian tax authorities 
for our applicable portion of withholding taxes related to Petrobras’ charter agreements with its contractors.  We 
intend  to  defend  these  matters  vigorously;  however,  litigation  is  inherently  unpredictable,  and  the  ultimate 
outcome or effect of these claims, lawsuits and actions cannot be predicted with certainty. As a result, there can be 
no assurance as to the ultimate outcome of these matters. Any claims against us, whether meritorious or not, could 
cause us to incur costs and expenses, require significant amounts of management time and result in the diversion 
of significant operational resources. In the opinion of our management, no pending or known threatened claims, 
actions  or  proceedings  against  us  are  expected  to  have  a  material  adverse  effect  on  our  consolidated  financial 
position, results of operations or cash flows.  

NPI Arrangement. We received customer payments measured by a percentage net profits interest (primarily 
of 27%) under an overriding royalty interest in certain developmental  oil-and-gas producing properties, or NPI, 
which we believe is a real property interest. Our drilling program related to the NPI was completed in 2011, and 
the balance of the amounts due to us under the NPI was received in 2013. However, the customer that conveyed 
the  NPI  to  us filed  a voluntary  petition for reorganization under  Chapter  11  of  the  Bankruptcy  Code in  August 
2012. Certain  parties  (including  the  debtor)  in  the  bankruptcy  proceedings  questioned  whether  our  NPI,  and 
certain amounts we received under it since the filing of the bankruptcy, should be included in the debtor’s estate 
under the bankruptcy proceeding. In 2013, we filed a declaratory judgment action in the bankruptcy court seeking 
a declaration that our NPI, and payments that we received from it since the filing of the bankruptcy, are not part of 
the  bankruptcy  estate.  We  agreed  to  a  settlement  with  the  company  that  purchased  most  of  the  debtor’s  assets 
(including the debtor’s claims against our NPI) whereby the nature of our NPI will not be challenged by that party 
and our declaratory judgment action was dismissed. Following the settlement, the bankruptcy was converted to a 
Chapter 7 liquidation proceeding.  Several lienholders who had previously intervened in the declaratory judgment 
action filed motions in the bankruptcy contending that their liens have priority and seeking disgorgement of $3.25 
million of payments made to us after the bankruptcy was filed. We believe that our rights to the payments at issue 
are  superior  to  these  liens,  and  we  have  filed  appropriate  motions  to  dismiss  these  claims.    In  addition,  the 
bankruptcy  trustee  filed  counterclaims  seeking  disgorgement  of  a  total  of  $30.0  million  of  pre-  and  post-
bankruptcy payments made to us under the original NPI.  We have filed motions to dismiss these counterclaims 
and still expect the bankruptcy proceedings to be concluded with no further material impact to us.  

Personal Injury Claims.  Under our current insurance policies, our deductibles for marine liability insurance 
coverage, including personal injury claims, which primarily result from Jones Act liability in the Gulf of Mexico, 
are $25.0 million for the first occurrence, with no aggregate deductible, and vary in amounts ranging between $5.0 
million and, if aggregate claims exceed certain thresholds, up to $100.0 million for each subsequent occurrence, 
depending on the nature, severity and frequency of claims that might arise during the policy year.   

The Jones Act is a federal law that permits seamen to seek compensation for certain injuries during the course 

73 

 
 
 
 
 
 
of their employment on a vessel and governs the liability of vessel operators and marine employers for the work-
related injury or death of an employee.  We engage outside consultants to assist us in estimating our aggregate 
liability  for  personal  injury  claims  based  on  our  historical  losses  and  utilizing  various  actuarial  models.    We 
allocate a portion of the aggregate liability to “Accrued liabilities” based on an estimate of claims expected to be 
paid within the next twelve months with the residual recorded as “Other liabilities.”  At December 31, 2015 our 
estimated  liability  for  personal  injury  claims  was  $40.4  million,  of  which  $8.2  million  and  $32.2  million  were 
recorded  in  “Accrued  liabilities”  and  “Other  liabilities,”  respectively,  in  our  Consolidated  Balance  Sheets.    At 
December 31, 2014, our estimated liability for personal injury claims  was $39.4 million, of which $8.2 million 
and $31.2 million were recorded in “Accrued liabilities” and “Other liabilities,” respectively, in our Consolidated 
Balance  Sheets.    The  eventual  settlement  or  adjudication  of  these  claims  could  differ  materially  from  our 
estimated amounts due to uncertainties such as: 

(cid:135) 
(cid:135) 
(cid:135) 
(cid:135) 
(cid:135) 

the severity of personal injuries claimed; 
significant changes in the volume of personal injury claims; 
the unpredictability of legal jurisdictions where the claims will ultimately be litigated; 
inconsistent court decisions; and 
the risks and lack of predictability inherent in personal injury litigation. 

Purchase  Obligations.    The  Ocean  GreatWhite,  a  10,000  foot  dynamically  positioned,  harsh  environment 
semisubmersible drilling rig, is under construction in South Korea at an estimated cost of $764 million, including 
shipyard  costs,  capital  spares,  commissioning,  project  management  and  shipyard  supervision.    The  contracted 
price to Hyundai Heavy Industries Co., Ltd. totaling $628.5 million is payable in two installments, of which the 
first installment of $188.6 million has been paid.  The final installment of $439.9 million is due upon delivery of 
the rig, which is expected to occur in mid-2016.   

At December 31, 2015, we had no other purchase obligations for major rig upgrades or any other significant 
obligations, except for those related to our direct rig operations, which arise during the normal course of business. 

Operating  Leases.  We  lease  office  and  yard  facilities,  housing,  equipment  and  vehicles  under  operating 
leases, which expire at various times through the year 2018.  Total rent expense amounted to $7.8 million, $10.6 
million and $13.5 million for the years ended December 31, 2015, 2014 and 2013, respectively.  Future minimum 
rental  payments  under  leases  are  approximately  $2.7  million,  $1.3  million  and  $0.4  million  for  the  years  2016, 
2017 and 2018, respectively.  There are no minimum future rental payments under operating leases after 2018. 

Letters of Credit and Other.  We were contingently liable as of December 31, 2015 in the amount of $71.6 
million  under  certain  performance,  supersedeas,  bid,  tax  and  customs  bonds  and  letters  of  credit.    Agreements 
relating  to  approximately  $64.0  million  of  performance,  tax,  supersedeas,  court  and  customs  bonds  can  require 
collateral at any time.  As of December 31, 2015, we had not been required to make any collateral deposits with 
respect to these agreements.  The remaining agreements cannot require collateral except in events of default.  On 
our behalf, banks have issued letters of credit securing certain of these bonds. 

13. Related-Party Transactions      

Transactions  with  Loews.    We  are  party  to  a  services  agreement  with  Loews,  or  the  Services  Agreement, 
pursuant  to  which  Loews  performs  certain  administrative  and  technical  services  on  our  behalf.  Such  services 
include  personnel,  internal  auditing,  accounting,  and  cash  management  services,  in  addition  to  advice  and 
assistance with respect to preparation of tax returns and obtaining insurance. Under the Services Agreement, we 
are required to reimburse Loews for (i) allocated personnel costs (such as salaries, employee benefits and payroll 
taxes) of the Loews personnel actually providing such services and (ii) all out-of-pocket expenses related to the 
provision  of  such  services.  The  Services  Agreement  may  be  terminated  at  our  option  upon  30  days’  notice  to 
Loews and at the option of Loews upon six months’ notice to us. In addition, we have agreed to indemnify Loews 
for all claims and damages arising from the provision of services by Loews under the Services Agreement unless 
due to the gross negligence or willful misconduct of Loews.  We were charged $1.3 million, $1.1 million and $1.0 
million  by  Loews  for  these  support  functions  during  the  years  ended  December  31,  2015,  2014  and  2013, 
respectively.   

Transactions with Other Related Parties.  We hire marine vessels and helicopter transportation services at the 
prevailing market rate from subsidiaries of SEACOR Holdings Inc. and Era Group Inc.  The Executive Chairman 
of the Board of Directors of SEACOR Holdings Inc. and the Non-Executive Chairman of the Board of Directors 
of  Era  Group  Inc.  is  also  a  member  of  our  Board  of  Directors.    We  paid  $6.0  million,  $0.8  million  and  $0.1 

74 

 
 
 
 
 
 
 
 
 
million for the hire of such vessels and such services during the years ended December 31, 2015, 2014 and 2013, 
respectively.   

The wife of our former President and Chief Executive Officer was an audit partner at Ernst & Young LLP, or 
E&Y, during his term of service with us.  For the year ended December 31, 2014, we made payments aggregating 
$2.9 million to E&Y for tax and other consulting services; however, E&Y ceased to be a related party on March 3, 
2014.  For the year ended December 31, 2013, we made payments to E&Y of $1.6 million. 

14.  Restructuring and Separation Costs 

During 2015, in response to  the continuing  decline  in the  offshore drilling  market, we reviewed our cost and 
organization  structure,  and,  as  a  result,  our  management  approved  and  initiated  a  reduction  in  workforce  at  our 
onshore bases and corporate facilities, also referred to as the Corporate Reduction Plan.  As of December 31, 2015, 
appropriate  communications  had  been  made  to  substantially  all  impacted  personnel,  and  we  paid  $9.8  million  in 
restructuring and employee separation related costs during 2015.  There were no accrued costs associated with the 
Corporate Reduction Plan as of December 31, 2015.   

15. Income Taxes 

Our income tax expense is a function of the mix between our domestic and international pre-tax earnings or 
losses, as well as the mix of international tax jurisdictions in which we operate.  Certain of our international rigs 
are owned and operated, directly or indirectly, by Diamond Foreign Asset Company, or DFAC, a Cayman Islands 
subsidiary  that  we  own.    It  is  our  intention  to  indefinitely  reinvest  future  earnings  of  DFAC  and  its  foreign 
subsidiaries to finance foreign activities.  Accordingly, we have not made a provision for U.S. income taxes on 
approximately $2.0 billion of undistributed foreign earnings and profits.  Although we do not intend to repatriate 
the earnings of our foreign subsidiary, and have not provided U.S. income taxes for such earnings, except to the 
extent that such earnings were immediately subject to U.S. income taxes, these earnings could become subject to 
U.S.  income  tax  if  remitted,  or  if  deemed  remitted  as  a  dividend;  however,  it  is  not  practical  to  estimate  this 
potential liability.   

  The components of income tax expense (benefit) are as follows: 

Year Ended December 31, 

2015 

2014 

2013 

Federal – current .....................................................................  
State – current .........................................................................   
Foreign – current .....................................................................  
           Total current .................................................................  

(In thousands) 
  $         63,223         $          66,843    $         40,045     
                 (121)  
                    93 
             59,926              151,339     
             71,656 
            126,648   
            134,972 

                  69 

         191,453 

Federal – deferred  ..................................................................  

        (245,045) 

                (6,699) 

46,767 

Foreign – deferred ...................................................................  

              3,010    

8,231  

(12,666)    

           Total deferred ...............................................................  
          Total ..............................................................................  

        (242,035)   
  $    (107,063)   

  $ 

1,532 
128,180    $ 

34,101 
225,554     

75 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
             
 
   
 
 
   
 
 
 
 
 
 
The difference between actual income tax expense and the tax provision computed by applying the statutory 

federal income tax rate to income before taxes is attributable to the following: 

Income before income tax expense: 
    U.S. .....................................................................................  
    Foreign ................................................................................  
    Worldwide ..........................................................................  
Expected income tax expense at federal statutory rate ............  
Foreign earnings of foreign subsidiaries (not taxed at the 
statutory federal income tax rate) net of related foreign 
taxes ....................................................................................  

Foreign earnings of foreign subsidiaries for which U.S. 

federal income taxes have been provided ............................  
Foreign taxes of domestic and foreign subsidiaries for which 
U.S. federal income taxes have also been provided ............  
Foreign tax credits ............................................ …………….. 
Interest capitalized by foreign subsidiaries .............................  
Impact of American Taxpayer Relief Act of 2012………….. 
Uncertain tax positions ...........................................................  
Amortization of deferred charges associated with 

intercompany rig sales to other tax jurisdictions .................  

Net expense (benefit) in connection with resolutions of tax 

issues and adjustments relating to prior years .....................  
Other .......................................................................................  
          Income tax expense .......................................................  

Year Ended December 31, 

2015 

2014 
(In thousands) 

2013 

  $      (11,158)    
         (370,190)      
  $    (381,348)   
  $    (133,472)   

  $         288,080 
              227,111 
515,191 
  $ 
180,317 
  $ 

  $         537,635 
              236,605 
774,240 
  $ 
270,984 
  $ 

            (5,518)  

(46,163)       

(102,359)   

                     9 

7,190 

805 

            27,193    
           (26,590)   
             (5,708) 
                       -- 
               1,169 

38,358         
(39,843)       
(16,492) 
                       -- 
   (47,964) 

45,428    
(46,524)   
(18,391) 
              (27,509) 
   66,085 

              38,466   

44,301         

 30,894    

            (2,283) 
              (329) 
  $    (107,063)   

  $ 

7,775 
701 
128,180 

  $ 

4,804 
1,337 
225,554 

Deferred Income Taxes.  Significant components of our deferred income tax assets and liabilities are as follows: 

Deferred tax assets: 
   Net operating loss carryforwards, or NOLs................  
   Foreign tax credits ......................................................  
   Worker’s compensation and other current accruals… 
   Bareboat charter deductions .......................................  
   UK depreciation deduction ........................................  
   Disputed receivables reserved ....................................  
   Deferred compensation ..............................................  
   Foreign contribution taxes ..........................................  
   Stock compensation awards .......................................  
   Deferred deductions ...................................................  
   Interest -Uncertain Tax Positions…………………... 
   Other  .........................................................................  
      Total deferred tax assets (1) ......................................  
   Valuation allowance for NOLs ..................................  
   Valuation allowance for foreign tax credits ...............  
   Valuation allowance for other deferred tax assets ......  
      Net deferred tax assets ............................................  
Deferred tax liabilities: 
   Depreciation ...............................................................  
   Mobilization ...............................................................  
   Unbilled revenue ........................................................  
   Undistributed earnings of foreign subsidiaries ...........  
   Other ..........................................................................  
      Total deferred tax liabilities ....................................  
Net deferred tax liability ...................................  

76 

December 31, 

2015 

2014 

(In thousands) 

  $  143,231      
            33,699 
            19,888 
            32,469 
            17,358 
              3,109 
              5,362 
              3,630 
            11,294 
            14,185 
              1,153 
              2,089 
       287,467 
           (93,191) 
                -- 
           (53,456) 
140,820 

20,277      

  $ 
             17,962 
         19,155 
            21,898      
                  -- 

           2,438 
14,409 
               5,345 
10,627 
12,196 
             1,011 
           2,244 
       127,562 
           (20,277) 
                (516) 
           (27,243) 
79,526 

(372,334) 
           (30,990) 
(13,971) 
(50) 
(4) 
(417,349) 

(577,103) 
           (10,655) 
(6,518) 
(24) 
(8) 
(594,308) 

  $   (276,529)        $   (514,782)     

 
 
 
 
 
 
 
 
 
   
     
     
    
   
   
   
   
   
    
    
    
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
    
    
 
 
 
 
 
 
 
 
 
(1) 

__________ 
In 2015, we adopted ASU 2015-17, as allowed by the standard.  In order to reduce the complexity of 
our  financial  statements  we  are  no  longer  separating  deferred  income  liabilities  and  assets  into 
current  and  noncurrent  classifications.    Prior  periods  were  not  retrospectively  adjusted  and 
accordingly,  at  December  31,  2014,  $15.6  million  was  reflected  in  “Prepaid  expenses  and  other 
current assets” in our Consolidated Balance Sheets.  See Notes 1 and 3. 

We record a valuation allowance to derecognize a portion of our deferred tax assets, which we do not expect 

to be ultimately realized.  A summary of changes in the valuation allowance is as follows:  

For the Year Ended December 31, 
2013 
2014 
2015 
(In thousands) 

Valuation allowance as of January 1 ............................................ $    48,036 
Establishment of valuation allowances: 
  Net operating losses ................................................................        82,155 
  Foreign tax credits ..................................................................             -- 
      Other deferred tax assets ........................................................        27,928 
Releases of valuation allowances in various jurisdictions ............       (11,472) 
Valuation allowance as of December 31 ...................................... $    146,647   

$ 

7,321  $  22,876 

15,677 
              516  
         27,243 
    (2,721) 

$ 

48,036  $ 

25 
              -- 
              -- 

  (15,580) 
7,321 

Net  Operating  Loss  Carryforwards  –  As  of  December  31,  2015,  we  had  recorded  a  deferred  tax  asset  of 
$143.2 million for the benefit of NOL carryforwards; $49.3 million related to our U.S. losses and $93.9 million 
related  to  our  international  operations.  Approximately  $28.6  million  of  this  deferred  tax  asset  relates  to  NOL 
carryforwards  that  have  an  indefinite  life.    The  remaining  $114.6  million  relates  to  NOL  carryforwards  of  our 
subsidiaries in Mexico, Hungary and the United States.   Unless utilized, tax benefits of NOL carryforwards will 
expire between 2020 and 2035 as follows: 

Year Expiring 
2020 ..........................................................................................  
2021 .....................................................................................................  
2022 .....................................................................................................  
2023 ..........................................................................................  
2024 ..........................................................................................  
2025 .....................................................................................................  
2035 ..........................................................................................  
  Total ........................................................................................  

Tax Benefit of 
NOL 
Carryforwards 
(In millions) 
  $ 
     56.1 
                  0.2 
                  0.1 
              0.1 
                   -- 
                  8.8 
49.3 
114.6    

  $ 

As of December 31, 2015, a valuation allowance for $93.2 million has been recorded for our NOLs for which 

the deferred tax assets are not likely to be realized. 

Foreign Tax Credits.  As of December 31, 2015, we had recorded a deferred tax asset of $33.7 million for the 
benefit of foreign tax credits in the U.S.  Unless utilized, our excess foreign tax credits in the U.S. will expire in 
2024 and 2025 as follows: 

Foreign Tax 

Credits          

Year Expiring 
2024 ..........................................................................................  
2025 ..........................................................................................  
  Total ........................................................................................  

  $ 

(In millions) 
    4.8 
28.9 
33.7    

  $ 

As of December 31, 2015, no valuation allowance has been recorded for our foreign tax credits. 

77 

 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Valuation  Allowances  -  Other  Deferred  Tax  Assets.    As  of  December  31,  2015,  we  recorded  valuation 

allowances for other deferred tax assets as follows: 

Deferred Tax Asset 
Bareboat charter deductions in the UK .....................................  
Depreciation deduction in the UK ..................................................  
Foreign contribution taxes in Brazil ..........................................  
  Total ........................................................................................  

Valuation 
Allowance 
(In millions) 
  $ 
     32.5 
                17.4 
3.6 
53.5    

  $ 

Unrecognized  Tax  Benefits.    Our  income  tax  returns  are  subject  to  review  and  examination  in  the  various 
jurisdictions in which we operate and we are currently contesting various tax assessments.  We accrue for income 
tax contingencies, or uncertain tax positions, that we believe are more likely than not exposures.  A reconciliation 
of  the  beginning  and  ending  amount  of  unrecognized  tax  benefits,  gross  of  tax  carryforwards  and  excluding 
interest and penalties, is as follows: 

Balance, beginning of period .................................................... $ 
  Additions for current year tax positions ..............................
  Additions for prior year tax positions .................................
  Reductions for prior year tax positions ...............................
  Reductions related to statute of limitation expirations ........
Balance, end of period .............................................................. $        

(57,116) 
               (7,013) 
                    (82) 
2,673 
7,586 
(53,952) 

2015 

2013 

For the Year Ended December 31, 
2014 
(In thousands) 
$ 
(90,921) 
             (5,813) 
                (292) 
34,630 
5,280 
$         (57,116) 

$ 
(67,150) 
             (1,724) 
           (31,264) 
7,280 
1,937 
$         (90,921) 

At  December  31,  2015,  $2.8  million,  $1.9  million  and  $50.3  million  of  the  net  liability  for  uncertain  tax 
positions  were  reflected  in  “Other  assets,”  “Deferred  tax  liability”  and  “Other  liabilities,”  respectively.    At 
December 31, 2014, $4.9 million and $55.4 million of the net liability for uncertain tax positions were reflected in 
“Other assets” and “Other liabilities,” respectively.  Of the net unrecognized tax benefits at December 31, 2015, 
2014  and  2013,  all  $49.4  million,  $50.5  million  and  $76.3  million,  respectively,  would  affect  the  effective  tax 
rates if recognized. 

The  following  table  presents  the  amount  of  accrued  interest  and  penalties  at  December  31,  2015  and  2014 

related to uncertain tax positions: 

December 31, 

2015 

2014 

(In thousands) 

Uncertain tax positions net, excluding interest and penalties ........................  
  Accrued interest on uncertain tax positions .............................................  
  Accrued penalties on uncertain tax positions ...........................................  
Uncertain tax positions net, including interest and penalties ........................  

$     (49,380) 
          (2,743) 
        (39,924) 
$      (92,047)    

$ 

$        

(50,513) 
(7,503) 
(37,622) 
(95,638) 

We  record  interest  related  to  accrued  uncertain  tax  positions  in  interest  expense  and  recognize  penalties 
associated with uncertain tax positions in tax expense.  Interest expense and penalties recognized during the three 
years ended December 31, 2015 related to uncertain tax positions are as follows: 

2015 

For the Year Ended December 31, 
2014 
(In thousands) 

2013 

Net increase (decrease) in interest expense related to 

unrecognized tax positions ..............................................  
Net increase (decrease) in penalties related to unrecognized 
tax positions ....................................................................  

$        (4,761) 

$ 

(5,283) 

$ 

5,758 

            2,302 

(22,175) 

38,136 

In several of the international locations in which we operate, certain of our wholly-owned subsidiaries enter 
into  agreements  with  other  of  our  wholly-owned  subsidiaries  to  provide  specialized  services  and  equipment  in 
support  of  our  foreign  operations.      We  apply  a  transfer  pricing  methodology  to  determine  the  amount  to  be 

78 

 
 
 
 
 
 
 
 
 
 
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
   
 
 
   
 
   
   
 
   
 
 
charged  for  providing  the  services  and  equipment.    In  most  cases,  there  are  alternative  transfer  pricing 
methodologies  that  could  be  applied  to  these  transactions  and,  if  applied,  could  result  in  different  chargeable 
amounts.    Taxing  authorities  in  the  various  foreign  locations  in  which  we  operate  could  apply  one  of  the 
alternative  transfer  pricing  methodologies  which  could  result  in  an  increase  to  our  income  tax  liabilities  with 
respect to tax returns that remain subject to examination.   

We  expect  the  statute  of  limitations  for  the  2010  tax  year  to  expire  in  2016  for  one  of  our  subsidiaries 
operating in Mexico, and we anticipate that the related unrecognized tax benefit will decrease by $0.7 million at 
that time. 

Tax  Returns  and  Examinations.    We  file  income  tax  returns  in  the  U.S.  federal  jurisdiction,  various  state 
jurisdictions and various foreign jurisdictions.  Tax years that remain subject to examination by these jurisdictions 
include years 2009 to 2015.  We are currently under audit in several of these jurisdictions.  We do not anticipate 
that  any  adjustments  resulting  from  the  tax  audit  of  any  of  these  years  will  have  a  material  impact  on  our 
consolidated results of operations, financial condition or cash flows. 

U.S. Jurisdiction.  Our 2013 tax year is currently under audit by the U.S. Internal Revenue Service.    

Brazil Tax Jurisdiction.  In December 2009, we received an assessment of approximately $26.0 million for 
the years 2004 and 2005, including interest and penalty.  We contested the tax assessment in 2010 and, during the 
third quarter of 2014, received a favorable court decision resulting in the closure of the 2004 and 2005 tax years.  
As a consequence, we reversed our $14.0 million reserve for this uncertain tax position, of which $3.5 million was 
interest and $4.4 million was penalty. 

In March 2013, the Brazilian tax authorities began an audit of our income tax returns for the years 2009 and 

2010.  The tax audit is still ongoing.   

In February 2012, the tax authorities concluded their audit of our income tax return for the 2007 tax year for 
which we received an assessment of approximately $17.1 million for income tax, including interest and penalties.  
We  contested  the  assessment  and  a  court  in  Brazil  ruled  to  cancel  the  assessment.    However,  the  Brazilian  tax 
authorities have appealed the ruling, and we are awaiting the outcome of the appeal.  We have not accrued any tax 
expense related to this assessment. 

In  addition,  the  Brazilian  tax  authorities  have  issued  an  assessment  for  the  2000  tax  year  of  approximately 
$1.5 million, including interest and penalty.  We have appealed the tax assessment and are awaiting the outcome 
of the appeal.   

Egypt Tax Jurisdiction.  During 2013, we were under audit by the Egyptian tax authorities for the tax years 
2006 through 2010.  In 2013, after receiving notification that the Egyptian government had concluded the income 
tax  audit  for  the  period  2006  to  2008  and  proposed  a  $1.2  billion  increase  to  taxable  income,  we  accrued  an 
additional $56.9 million of expense for uncertain tax positions in Egypt for all open years.  During the first quarter 
of  2014,  we  settled  certain  disputes  for  the  years  2006  through  2008  with  the  Egyptian  tax  authorities,  which 
resulted in an aggregate $17.2 million reduction in tax expense, comprised of a $23.2 million reversal of uncertain 
tax  positions,  partially  offset  by  $6.0  million  in  current  foreign  income  tax  expense.    One  issue  for  the  2006 
through 2008 period remains open, which we appealed.  Our court case is scheduled to occur in the first quarter of 
2016.  We have sought assistance from an agency of the U.S. Treasury Department, pursuant to international tax 
treaties, and continue to believe that our position will, more likely than not, be sustained.  However, if our position 
is  not  sustained,  tax  expense  and  related  penalties  would  increase  by  approximately  $53  million  related  to  this 
issue for the 2006 through 2008 tax years as of December 31, 2015. 

We are currently also under audit by the Egyptian tax authorities for the tax years 2009 through 2012. 

Malaysia Tax Jurisdiction.  During the third quarter of 2014, we received final approval from the Malaysian 
tax authorities for the settlement of tax liabilities and penalties for the years 2003 through 2008 resulting in the 
reversal of a $14.2 million reserve for uncertain tax positions for these years, of which $5.3 million was penalty. 

Mexico Tax Jurisdiction.  During the year ended December 31, 2015, the statute of limitations for the 2008 
tax year related to an uncertain tax position expired and we reversed our $3.8 million tax accrual, of which $1.3 
million  was  interest  and  $0.5  million  was  penalty.  In  addition,  the  statute  of  limitations  for  the  2009  tax  year 

79 

 
 
 
 
 
 
 
 
 
 
 
 
related to an uncertain tax position expired, and we reversed our $10.7 million tax accrual, of which $3.6 million 
was interest and $1.4 million was penalty. 

In  August  2015,  the  Mexican  tax  authorities  completed  an  audit  for  the  2008  tax  year  for  one  of  our 
subsidiaries operating in Mexico and issued an assessment in the amount of $5.3 million, including interest and 
penalty.  We have appealed the tax assessment and are awaiting the outcome of the appeal. We have not accrued 
any tax expense related to this assessment.  In June 2015, the Mexican tax authorities initiated an audit of the 2009 
income tax return of one of our other subsidiaries operating in Mexico. 

Due  to  the  2014  expiration  of  the  statute  of  limitations  in  Mexico  for  the  2008  tax  year  for  one  of  our 
subsidiaries operating in Mexico, we reversed our $8.0 million accrual for an uncertain tax position, of which $2.7 
million was interest and $1.1 million was penalty, during the year ended December 31, 2014.   

The tax authorities in Mexico previously audited our income tax returns for the years 2004 and 2006 and had 
issued assessments for tax years 2004 and 2006 of approximately $22.9 million and $24.4 million, respectively, 
including  interest  and  penalties,  which  we  had  appealed.    In  2013  the  Mexican  tax  authorities  initiated  a  tax 
amnesty  program  whereby  income  tax  assessments,  including  penalties  and  interest,  could  be  partially  or 
completely waived.  Under the tax amnesty, we were able to settle our tax liabilities for the years 2004 and 2006 
for a net cash cost of $3.7 million.  As a result of increases in uncertain tax positions for later years, we recorded 
an additional $13.2 million of expense, including $5.0 million of interest and $2.7 million of penalties, during the 
year ended December 31, 2013. 

Due to the expiration of the statute of limitations in Mexico for the 2007 tax year, during the second quarter 
of 2013, we reversed our $4.3 million accrual for this uncertain tax position, of which $1.5 million was interest 
and $0.6 million was penalty. 

Australia Jurisdiction.  We are currently under audit for tax years 2010 through 2013.   

American Taxpayer Relief Act of 2012.  The American Taxpayer Relief Act of 2012, or the Act, was signed 
into  law  on  January  2,  2013.    The  Act  extended  through  2013  several  expired  or  expiring  temporary  business 
provisions, commonly referred to as “extenders,” which were retroactively extended to the beginning of 2012.  As 
required by GAAP, the effects of new legislation are recognized when signed into law.  Consequently, we reduced 
our 2013 tax expense by $27.5 million as a result of recognizing the 2012 effect of the extenders. 

16. Employee Benefit Plans 

Defined Contribution Plans 

We  maintain  defined  contribution  retirement  plans  for  our  U.S.,  U.K.  and  third-country  national,  or  TCN, 
employees.  The plan for our U.S. employees, or the 401k Plan, is designed to qualify under Section 401(k) of the 
Code.    Under  the  401k  Plan,  each  participant  may  elect  to  defer  taxation  on  a  portion  of  his  or  her  eligible 
earnings, as defined by the 401k Plan, by directing his or her employer to withhold a percentage of such earnings. 
A  participating  employee  may  also  elect  to  make  after-tax  contributions  to  the  401k  Plan.    During  each  of  the 
years  ended  December  31,  2015,  2014  and  2013,  we  matched  up  to  6%  of  each  employee’s  compensation 
contributed to the 401k Plan.  During the four months ended April 30, 2015 and the years ended December 31, 
2014 and 2013, we made discretionary profit sharing contributions of 4% of a participant’s defined compensation 
to  the  401k  Plan.    We  ceased  making  profit  sharing  contributions  under  the  401k  Plan  on  May  1,  2015.  
Participants are fully vested in the employer match immediately upon enrollment in the 401k Plan and subject to a 
three-year cliff vesting period for any profit sharing contribution.  For the years ended December 31, 2015, 2014 
and 2013, our provision for contributions was $23.8 million, $34.1 million and $29.6 million, respectively. 

The defined contribution retirement plan for our U.K. employees provides that we make annual contributions 
in  an  amount  equal  to  the  employee's  contributions  generally  up  to  a  maximum  percentage  of  the  employee's 
defined compensation per year.  For each of the years ended December 31, 2015, 2014 and 2013, our contribution 
for  employees  working  in  the  U.K.  sector  of  the  North  Sea  was  up  to  a  maximum  of  10%,  of  the  employee's 
defined  compensation.    Our  provision  for  contributions  was  $3.4  million,  $5.0  million  and  $3.5  million  for  the 
years ended December 31, 2015, 2014 and 2013, respectively.  

The defined contribution retirement plan for our TCN employees, or International Savings Plan, is similar to 
the 401k Plan.  During each of the years ended December 31, 2015, 2014 and 2013, we matched up to 6% of each 

80 

 
 
 
 
 
 
 
 
 
 
 
 
employee’s compensation contributed to the International Savings Plan.  During the four months ended April 30, 
2015 and the years ended December 31, 2014 and 2013, we made discretionary profit sharing contributions of 4% 
of  a  participant’s  defined  compensation  to  the  International  Savings  Plan.    We  ceased  making  profit  sharing 
contributions under this plan on May 1, 2015.  Our provision for contributions was $2.2 million, $3.7 million and 
$3.1 million for the years ended December 31, 2015, 2014 and 2013, respectively.  

Deferred Compensation and Supplemental Executive Retirement Plan 

Our Amended and Restated Diamond Offshore Management Company Supplemental Executive Retirement 
Plan, or Supplemental Plan, provides benefits to a select group of our management or other highly compensated 
employees  to  compensate  such  employees  for  any  portion  of  our  base  salary  contribution  and/or  matching 
contribution under the 401k Plan that could not be contributed to that plan because of limitations within the Code.  
Our provision for contributions to the Supplemental Plan for the years ended December 31, 2015, 2014 and 2013 
was approximately $153,000, $265,000 and $261,000, respectively.  

17. Segments and Geographic Area Analysis 

Although we provide contract drilling services with different types of offshore drilling rigs and also provide 
such  services  in  many  geographic  locations,  we  have  aggregated  these  operations  into  one  reportable  segment 
based on the similarity of economic characteristics due to the nature of the revenue earning process as it relates to 
the offshore drilling industry over the operating lives of our drilling rigs. 

Revenues from contract drilling services by equipment-type are listed below: 

Year Ended December 31, 

  2015 

  2014 

  2013 

(In thousands) 

  Floaters: 
    Ultra-Deepwater ..........................................   $  1,339,059 
548,667 
    Deepwater ...................................................  
    Mid-Water ...................................................  
387,549 
      Total Floaters ............................................        2,275,275 
84,909 
  Jack-ups ........................................................  
          Total  contract drilling revenues ............  
2,360,184 
59,209 
  Revenues related to reimbursable expenses ..  
          Total revenues .......................................   $  2,419,393 

$ 

987,565 
494,247 
      1,076,842 
    2,558,654 
178,472 
2,737,126 
77,545 
$  2,814,671 

$ 

854,515 
617,080 
      1,197,934 
    2,669,529 
174,055 
2,843,584 
76,837 
$  2,920,421 

Geographic Areas 

Our drilling rigs are highly mobile and may be moved to other markets throughout the world in response to 
market conditions or customer needs.  At December 31, 2015, our actively-marketed drilling rigs were en route to 
or located offshore seven countries in addition to the United States.  Revenues by geographic area are presented 
by attributing revenues to the individual country or areas where the services were performed.    

  United States .................................................  

  $ 

  International: 
     South America ............................................  
     Europe/Africa/Mediterranean .....................  
     Australia/Asia .............................................  
     Mexico .......................................................  

  2015 

Year Ended December 31, 
2014 
(In thousands) 
418,095 
  $ 

  $ 

513,605 

812,271 
532,824 
415,033 
145,660 
1,905,788 

1,088,796 
558,367 
503,814 
245,599 
2,396,576 

2013 

330,471 

1,219,287 
731,888 
438,814 
199,961 
2,589,950 

          Total revenues .......................................  

  $  2,419,393 

  $  2,814,671 

  $  2,920,421 

81 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
   
   
 
   
   
   
 
 
 
 
 
An  individual  international  country  may,  from  time  to  time,  comprise  a  material  percentage  of  our  total 
contract drilling revenues from unaffiliated customers.  For the years ended December 31, 2015, 2014 and 2013, 
individual countries that comprised 5% or more of our total contract drilling revenues from unaffiliated customers 
are listed below. 

Year Ended December 31, 
  2014 

  2015 

2013 

Brazil ..............................................................  
United Kingdom .............................................  
Trinidad ..........................................................  
Romania ..........................................................  
Australia .........................................................  
Malaysia .........................................................  
Mexico ............................................................  

23.1% 
11.4% 
9.8% 
9.7% 
7.0% 
6.8% 
6.0% 

31.0% 
10.7% 
4.0% 
3.9% 
6.4% 
5.5% 
8.7% 

38.3% 
            7.9% 
            1.7% 
            -- 
3.2% 
2.9% 
            6.9% 

The following table presents our long-lived tangible assets by geographic location as of December 31, 2015, 
2014  and  2013.    A  substantial  portion  of  our  assets  is  comprised  of  rigs  that  are  mobile,  and  therefore  asset 
locations  at  the  end  of  the  period  are  not  necessarily  indicative  of  the  geographic  distribution  of  the  earnings 
generated by such assets during the periods and may vary from period to period due to the relocation of rigs.  In 
circumstances where our drilling rigs were in transit at the end of a calendar year, they have been presented in the 
tables below within the geographic area in which they were expected to operate.  

2015(1) 

December 31, 
  2014 
(In thousands) 

2013 

Drilling and other property and equipment, net: 
  United States(2) ..............................................  

$  3,292,474 

$  2,637,621 

$  611,731 

   International: 

  Australia/Asia/Middle East (3) ....................  
  South America ...........................................     
Europe/Africa/Mediterranean .....................  
  Mexico ........................................................  

  1,224,089 
  1,051,283 
664,520 
146,448 
  3,086,340 

  1,460,841 
  1,445,832 
  1,128,857 
272,802 
  4,308,332 

  2,078,348 
  1,690,976 
793,097 
293,075 
  4,855,496 

          Total ......................................................  

$  6,378,814 

$  6,945,953 

$  5,467,227 

(1)  During 2015, we recorded an aggregate impairment loss of $860.4 million to write down certain of 

our drilling rigs with indicators of impairment to their estimated recoverable amounts. 

(2)  Long-lived tangible assets in the United States region as of December 31, 2015 and December 31, 
2014 included $2.6 billion and $1.9 billion, respectively, related to our newbuild drillships, three 
of which were located in GOM waters in 2014 and the fourth of which arrived in 2015.   

(3)  Long-lived tangible assets in the Australia/Asia/Middle East region include $270.0 million, $439.2 
million and $1,064.5 million in construction work-in-progress for rigs under construction in South 
Korea as of December 31, 2015, 2014 and 2013, respectively. 

82 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The following table presents the countries in which material concentrations of our long-lived tangible assets 

were located as of December 31, 2015, 2014 and 2013:  

  United States .................................................  
  Brazil.............................................................     
  Malaysia ........................................................  
  South Korea ..................................................  
  Spain .............................................................  
  Mexico ..........................................................  
  Vietnam .........................................................  
  Singapore ......................................................  
  Angola...........................................................  
  Indonesia .......................................................  

2015 

December 31, 
  2014 

2013 

51.6% 
15.3% 
10.4% 
4.2% 
2.7% 
2.3% 
-- 
-- 
-- 
-- 

38.0% 
20.3% 
6.6% 
6.3% 
8.1% 
3.9% 
6.9% 
-- 
-- 
-- 

11.2% 
30.2% 
4.3% 
19.5% 
1.2% 
5.4% 
0.6% 
8.2% 
6.3% 
5.2% 

As of December 31, 2015, 2014 and 2013, no other countries had more than a 5% concentration of our long-

lived tangible assets. 

Major Customers 

Our  customer  base  includes  major  and  independent  oil  and  gas  companies  and  government-owned  oil 
companies.    Revenues  from  our  major  customers  for  the  years  ended  December  31,  2015,  2014  and  2013  that 
contributed more than 10% of our total revenues are as follows: 

Customer 

  2015 

  2014 

  2013 

Year Ended December 31, 

Petróleo Brasileiro S.A.  .....................................  
ExxonMobil ........................................................  
Anadarko ............................................................  

24.1% 
12.4% 
12.4% 

31.9% 
5.0% 
3.6% 

33.6% 
-- 
-- 

18. Unaudited Quarterly Financial Data 

Unaudited summarized financial data by quarter for the years ended December 31, 2015 and 2014 is shown 

below. 

First 
Quarter 

Second 
Quarter 

Third 
Quarter 

Fourth 
Quarter  

(In thousands, except per share data) 

2015 
Revenues ...........................................................  
Operating (loss) income (1) ................................  
(Loss) income before income tax expense ........  
Net (loss) income ..............................................  
Net (loss) income per share, basic and diluted ..  

2014 
Revenues ...........................................................  
Operating income ..............................................  
Income before income tax expense ...................  
Net income ........................................................  
Net income per share, basic and diluted ............  

$ 

  620,056 
 (269,530) 
(287,118) 
 (255,709) 
$          (1.86) 

   $     634,032 
134,121 
106,028 
90,386 
$          0.66 

  $ 609,742 
181,434 
159,767 
136,422 

  $ 555,563 
(340,099) 
(360,025) 
(245,384) 
$        0.99  $      (1.79) 

  $     709,424 
186,277 
167,679 
145,810 
$          1.05 

   $     692,244 
133,766 
112,603 
89,713 
$          0.65 

  $ 737,682 
90,416 
81,639 
52,645 

 $  675,321 
162,103 
153,270 
98,843 
$        0.38  $         0.72 

(1)  During  the  first,  third  and  fourth  quarters  of  2015,  we  recognized  impairment  losses  of  $358.5 
million, $2.6 million and $499.4 million, respectively, aggregating $860.4 million for the year ended 
December 31, 2015 to write down certain of our drilling rigs with indicators of impairment to their 
estimated recoverable amounts.  See Notes 1 and 2.     

83 

 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
 
 
 
 
 
 
 
 
    
    
    
 
 
19. Subsequent Event  

In February 2016, we entered into a ten-year agreement with GE Oil & Gas, or GE, to provide services with 
respect  to  certain  blowout  preventer  and  related  well  control  equipment  on  our  four  newbuild  drillships.   Such 
services  include  management  of  maintenance,  certification  and  reliability  with  respect  to  such  equipment.   In 
connection  with  the  services  agreement  with  GE,  we  will  sell  the  equipment  to  a  GE  affiliate  for  an  aggregate 
$210.0 million and will lease back such equipment over separate ten-year operating leases.  We do not expect to 
realize any gain or loss on these sale and leaseback transactions.  Future commitments for the full term under the 
services agreement and leases are estimated to aggregate approximately $650.0 million.   

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure. 

  Not applicable. 

Item 9A.  Controls and Procedures 

Disclosure Controls and Procedures 

  We maintain a system of disclosure controls and procedures which are designed to ensure that information 
required  to  be disclosed  by  us  in  reports  that  we  file  or  submit  under  the  federal  securities  laws,  including  this 
report,  is  recorded,  processed,  summarized  and  reported  on  a  timely  basis.  These  disclosure  controls  and 
procedures  include  controls  and  procedures  designed  to  ensure  that  information  required  to  be  disclosed  by  us 
under the federal securities laws is accumulated and communicated to our management on a timely basis to allow 
decisions regarding required disclosure. 

Our Chief Executive Officer, or CEO, and Chief Financial Officer, or CFO, participated in an evaluation by 
our management of the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 
13a-15(e) and 15d-15(e)) as of December 31, 2015.  Based on their participation in that evaluation, our CEO and 
CFO concluded that our disclosure controls and procedures were effective as of December 31, 2015. 

Internal Control Over Financial Reporting 

Management’s Annual Report on Internal Control Over Financial Reporting 

Our  management  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over  financial 
reporting (as defined  in  Exchange Act  Rules  13a-15(f)  and  15d-15(f))  for Diamond Offshore Drilling, Inc.  Our 
internal control system was designed to provide reasonable assurance to our management and Board of Directors 
regarding the preparation and fair presentation of published financial statements.   

There are inherent limitations to the effectiveness of any control system, however well designed, including 
the possibility of human error and the possible circumvention or overriding of controls. Further, the design of a 
control  system  must  reflect  the  fact  that  there  are  resource  constraints,  and  the  benefits  of  controls  must  be 
considered  relative  to  their  costs.  Management  must  make  judgments  with  respect  to  the  relative  cost  and 
expected  benefits  of  any  specific  control  measure.  The  design  of  a  control  system  also  is  based  in  part  upon 
assumptions  and  judgments  made  by  management  about  the  likelihood  of  future  events,  and  there  can  be  no 
assurance that a control will be effective under all potential future conditions. As a result, even an effective system 
of  internal  controls  can  provide  no  more  than  reasonable  assurance  with  respect  to  the  fair  presentation  of 
financial statements and the processes under which they were prepared. 

Our management assessed the effectiveness of our internal control over financial reporting as of December 
31, 2015. In making this assessment, our management used the criteria set forth by the Committee of Sponsoring 
Organizations of the Treadway Commission (COSO) in Internal Control – Integrated Framework (2013). Based 
on  this  assessment  our  management  believes  that,  as  of  December  31,  2015,  our  internal  control  over  financial 
reporting was effective. 

Deloitte & Touche LLP, the registered public accounting firm that audited our financial statements included 
in this Annual Report on Form 10-K, has issued an attestation report on the effectiveness of our internal control 

84 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
over financial reporting. The attestation report of Deloitte & Touche LLP is included at the beginning of Item 8 of 
this Form 10-K. 

Changes in Internal Control Over Financial Reporting 

There  were  no  changes  in  our  internal  control  over  financial  reporting  identified  in  connection  with  the 
foregoing  evaluation  that  occurred during our fourth  fiscal  quarter  of  2015  that  have materially  affected,  or  are 
reasonably likely to materially affect, our internal control over financial reporting. 

Item 9B.  Other Information. 

Not applicable. 

PART III 

Reference is made to the information responsive to Items 10, 11, 12, 13 and 14 of this Part III contained in our 

definitive proxy statement for our 2016 Annual Meeting of Stockholders, which is incorporated herein by reference. 

Item 10.   Directors, Executive Officers and Corporate Governance. 

Item 11.   Executive Compensation. 

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. 

Item 13.   Certain Relationships and Related Transactions, and Director Independence. 

Item 14.   Principal Accountant Fees and Services. 

Item 15.   Exhibits and Financial Statement Schedules. 

PART IV 

(a)  Index to Financial Statements, Financial Statement Schedules and Exhibits 

(1)  Financial Statements 

Report of Independent Registered Public Accounting Firm ....................  
Consolidated Balance Sheets ...................................................................  
Consolidated Statements of Operations ...................................................  
Consolidated Statements of Comprehensive Income ...............................  
Consolidated Statements of Stockholders’ Equity ...................................  
Consolidated Statements of Cash Flows ..................................................  
Notes to Consolidated Financial Statements ............................................  

(2)  Exhibit Index 

Page 

46 
48 
49 
50 
51 
52 
53 

88 

See the Exhibit Index for a list of those exhibits filed herewith, which Exhibit Index also includes and identifies 
management contracts or compensatory plans or arrangements required to be filed as exhibits to this Form 10-K by 
Item 601 of Regulation S-K. 

85 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
SIGNATURES 

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has 
duly  caused  this  report  to  be  signed  on  its  behalf  by  the  undersigned,  thereunto  duly  authorized,  on  February  19, 
2016. 

DIAMOND OFFSHORE DRILLING, INC. 

By:   /s/ GARY T. KRENEK 

    Gary T. Krenek 

    Senior Vice President and Chief Financial Officer 

POWER OF ATTORNEY 

Each person whose signature appears below constitutes and appoints Gary T. Krenek and David L. Roland and 
each  of  them,  as  his  or  her  true  and  lawful  attorneys-in-fact  and  agents,  with  full  power  of  substitution  and  re-
substitution,  for  him  or  her  and  in  his  or  her  name,  place  and  stead,  in  any  and  all  capacities,  to  sign  any  and  all 
documents relating to this Annual Report on Form 10-K, including any and all amendments and supplements thereto, 
and  to  file  the  same  with  all  exhibits  thereto  and  other  documents  in  connection  therewith  with  the  Securities  and 
Exchange  Commission, granting  unto  said  attorneys-in-fact  and  agents  full  power  and  authority  to  do  and perform 
each and every act and thing requisite and necessary to be done, as fully as to all intents and purposes as he or she 
might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or their or his 
or her substitute or substitutes may lawfully do or cause to be done by virtue hereof. 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the 

following persons on behalf of the registrant and in the capacities and on the dates indicated. 

Signature 

Title 

Date 

         /s/ MARC EDWARDS 
            Marc Edwards 

President, Chief Executive Officer and  
Director (Principal Executive Officer) 

February 19, 2016 

          /s/ GARY T. KRENEK       
            Gary T. Krenek 

          /s/ BETH G. GORDON       
            Beth G. Gordon 

Senior Vice President and   
Chief Financial Officer 
(Principal Financial Officer) 

February 19, 2016 

Controller (Principal Accounting Officer)  February 19, 2016 

          /s/ JAMES S. TISCH       

Chairman of the Board 

February 19, 2016 

James S. Tisch 

/s/ JOHN R. BOLTON    
            John R. Bolton 

Director  

February 19, 2016 

      /s/ CHARLES L. FABRIKANT __    

Director  

February 19, 2016 

            Charles L. Fabrikant 

/s/ PAUL G. GAFFNEY II    
            Paul G. Gaffney II 

/s/ EDWARD GREBOW    
            Edward Grebow 

Director  

Director  

February 19, 2016 

February 19, 2016 

          /s/ HERBERT C. HOFMANN      

Director  

February 19, 2016 

            Herbert C. Hofmann 

86 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
       
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
                
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
          /s/ KENNETH I. SIEGEL    
            Kenneth I. Siegel 

  /s/ CLIFFORD M. SOBEL    
            Clifford M. Sobel   

  /s/ ANDREW H. TISCH     
            Andrew H. Tisch 

  /s/ RAYMOND S. TROUBH     
            Raymond S. Troubh 

Director  

Director  

Director  

Director  

February 19, 2016 

February 19, 2016 

February 19, 2016 

February 19, 2016 

87 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit No. 
3.1 

Description 
Amended and Restated Certificate of Incorporation of Diamond Offshore Drilling, Inc. (incorporated by 
reference to Exhibit 3.1 to our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 
2003)  (SEC File No. 1-13926). 

EXHIBIT INDEX 

3.2 

4.1 

4.2 

4.3 

4.4 

10.1 

10.2 

10.3 

10.4+ 

10.5+ 

10.6+ 

10.7+ 

10.8+ 

Amended and Restated By-laws (as amended through October 4, 2013) of Diamond Offshore Drilling, 
Inc. (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed October 8, 2013). 

Indenture, dated as of February 4, 1997, between Diamond Offshore Drilling, Inc. and The Bank of New 
York Mellon Trust Company, N.A. (formerly known as The Bank of New York) (as successor to The 
Chase Manhattan Bank), as Trustee (incorporated by reference to Exhibit 4.1 to our Annual Report on 
Form 10-K for the fiscal year ended December 31, 2001) (SEC File No. 1-13926). 

Sixth Supplemental Indenture, dated as of May 4, 2009, between Diamond Offshore Drilling, Inc. and 
The  Bank  of  New  York  Mellon  Trust  Company,  N.A.  (formerly  known  as  The  Bank  of  New  York 
Mellon), as Trustee (incorporated by reference to Exhibit 4.2 to our Current Report on Form 8-K filed 
May 4, 2009) (SEC File No. 1-13926). 

Seventh Supplemental Indenture, dated as of October 8, 2009, between Diamond Offshore Drilling, Inc. 
and The Bank of New York Mellon Trust Company, N.A. (formerly known as The Bank of New York 
Mellon), as Trustee (incorporated by reference to Exhibit 4.2 to our Current Report on Form 8-K filed 
October 8, 2009) (SEC File No. 1-13926). 

Eighth  Supplemental  Indenture,  dated  as  of  November  5,  2013,  between  Diamond  Offshore  Drilling, 
Inc. and The Bank of New York Mellon Trust Company, N.A. (formerly known as The Bank of New 
York Mellon), as Trustee (incorporated by reference to Exhibit 4.2 to our Current Report on Form 8-K 
filed November 5, 2013). 

Registration Rights Agreement (the “Registration Rights Agreement”) dated October 16, 1995 between 
Loews  and Diamond Offshore  Drilling, Inc.  (incorporated  by reference  to  Exhibit  10.1  to our Annual 
Report on Form 10-K for the fiscal year ended December 31, 2001) (SEC File No. 1-13926). 

Amendment  to  the  Registration  Rights  Agreement,  dated  September  16,  1997,  between  Loews  and 
Diamond  Offshore  Drilling,  Inc.  (incorporated  by  reference  to  Exhibit  10.2  to  our  Annual  Report  on 
Form 10-K for the fiscal year ended December 31, 1997) (SEC File No. 1-13926). 

Services  Agreement,  dated  October  16,  1995,  between  Loews  and  Diamond  Offshore  Drilling,  Inc. 
(incorporated by reference to Exhibit 10.3 to our Annual Report on Form 10-K for the fiscal year ended 
December 31, 2001) (SEC File No. 1-13926). 

Amended and Restated Diamond Offshore Management Company Supplemental Executive Retirement 
Plan effective as of January 1, 2007 (incorporated by reference to Exhibit 10.4 to our Annual Report on 
Form 10-K for the fiscal year ended December 31, 2006) (SEC File No. 1-13926). 

Diamond Offshore Management Bonus Program, as amended and restated, and dated as of December 
31, 1997 (incorporated by reference to Exhibit 10.6 to our Annual Report on Form 10-K for the fiscal 
year ended December 31, 1997) (SEC File No. 1-13926). 

Diamond  Offshore  Drilling,  Inc.  Equity  Incentive  Compensation  Plan  (incorporated  by  reference  to 
Exhibit B attached to our definitive proxy statement on Schedule 14A filed April 1, 2014).  

Form  of  Stock  Option  Certificate  for  grants  to  executive  officers,  other  employees  and  consultants 
pursuant to the Equity Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to our 
Current Report on Form 8-K filed October 1, 2004) (SEC File No. 1-13926). 

Form of Stock Option Certificate for grants to non-employee directors pursuant to the Equity Incentive 
Compensation Plan (incorporated by reference to Exhibit 10.2 to our Current Report on Form 8-K filed 
October 1, 2004) (SEC File No. 1-13926). 

88 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.9+ 

10.10+ 

10.11+ 

10.12+ 

10.13+ 

10.14+ 

10.15+ 

10.16+ 

10.17+ 

10.18+ 

10.19+ 

10.20 

10.21 

10.22 

The Diamond Offshore Drilling, Inc. Incentive Compensation Plan for Executive Officers (as Amended 
and Restated as of March 28, 2014) (incorporated by reference to Exhibit A attached to our definitive 
proxy statement on Schedule 14A filed April 1, 2014). 

Form of Award Certificate for stock appreciation right grants to the Company’s executive officers, other 
employees  and  consultants  pursuant  to  the  Equity  Incentive  Compensation  Plan  (incorporated  by 
reference  to  Exhibit  10.1  to  our  Current  Report  on  Form  8-K  filed  April  28,  2006)  (SEC  File  No.  1-
13926). 

Form of Award Certificate for stock appreciation right grants to non-employee directors pursuant to the 
Equity Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to our Quarterly Report 
on Form 10-Q for the quarterly period ended March 31, 2007) (SEC File No. 1-13926). 

Form of Award Certificate for grants of Performance Restricted Stock Units under the Equity Incentive 
Compensation Plan (incorporated by reference to Exhibit 10.5 to our Quarterly Report Form 10-Q for 
the quarterly period ended March 31, 2014). 

Specimen  Agreement  for  grants  of  restricted  stock  units  to  officers  under  the  Equity  Incentive 
Compensation Plan (incorporated by reference to Exhibit 10.1 to our Current Report on Form 8-K filed 
March 30, 2015). 

Specimen Agreement for grants of restricted stock units to the Chief Executive Officer under the Equity 
Incentive Compensation Plan (incorporated by reference to Exhibit 10.2 to our Current Report on 8-K 
filed March 30, 2015). 

Employment Agreement between Diamond Offshore Management Company and Gary T. Krenek dated 
as of December 15, 2006 (incorporated by reference to Exhibit 10.2 to our Current Report on Form 8-K 
filed December 21, 2006) (SEC File No. 1-13926). 

Employment Agreement between Diamond Offshore Management Company and Lyndol L. Dew dated 
as of December 15, 2006 (incorporated by reference to Exhibit 10.17 to our Annual Report on Form 10-
K for the fiscal year ended December 31, 2006) (SEC File No. 1-13926). 

Employment Agreement between Diamond Offshore Management Company and Beth G. Gordon dated 
as of January 3, 2007 (incorporated by reference to Exhibit 10.19 to our Annual Report on Form 10-K 
for the fiscal year ended December 31, 2006) (SEC File No. 1-13926). 

Amendment to Employment Agreement, dated April 1, 2015, between Diamond Offshore Management 
Company  and  Beth  G.  Gordon  (incorporated  by  reference  to  Exhibit  10.4  to  our  Quarterly  Report  on 
Form 10-Q for the quarterly period ended March 31, 2015). 

Separation  Agreement  and  General  Release,  dated  March  30,  2015,  between  Diamond  Offshore 
Management  Company  and  John  M.  Vecchio  (incorporated  by  reference  to  Exhibit  10.2  to  our 
Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2015). 

5-Year  Revolving  Credit  Agreement,  dated  as  of  September  28,  2012,  among  Diamond  Offshore 
Drilling, Inc., Wells Fargo Bank, National Association, as administrative agent and swingline lender, the 
issuing banks named therein and the lenders named therein (incorporated by reference to Exhibit 10.1 to 
our Current Report on Form 8-K filed October 1, 2012). 

Extension  Agreement  and  Amendment  No.  1  to  Credit  Agreement,  dated  as  of  December  9,  2013, 
among Diamond Offshore Drilling, Inc., Wells Fargo Bank, National Association, as an issuing bank, as 
swingline  lender  and  as  administrative  agent  for  the  lenders,  and  the  lenders  named  therein 
(incorporated  by  reference  to  Exhibit  10.20  to  our  Annual  Report  on  Form  10-K  for  the  fiscal  year 
ended December 31, 2013). 

Commitment Increase and Amendment No. 2 to Credit Agreement, dated as of March 17, 2014, among 
Diamond  Offshore  Drilling,  Inc.,  Wells  Fargo  Bank,  National  Association,  as  an  issuing  bank,  as 
swingline  lender  and  as  administrative  agent  for  the  lenders,  and  the  lenders  named  therein 
(incorporated  by  reference  to  Exhibit  10.2  to  our  Quarterly  Report  on  Form  10-Q  for  the  quarterly 

89 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
period ended March 31, 2014). 

10.23 

10.24 

10.25 

10.26+ 

10.27+ 

10.28+ 

Commitment Increase and Extension Agreement and Amendment No. 3 to Credit Agreement, dated as 
of October 22, 2014, among Diamond Offshore Drilling, Inc., Wells Fargo Bank, National Association, 
as  administrative  agent  and  swingline  lender,  the  issuing  banks  named  therein  and  the  lenders  named 
therein (incorporated by reference to Exhibit 10.1 to our Current Report on Form 8-K filed October 24, 
2014). 

Extension Agreement and Amendment No. 4 to Credit Agreement, dated as of October 22, 2015, among 
Diamond Offshore Drilling, Inc., Wells Fargo Bank, National Association, as administrative agent and 
swingline  lender,  the  issuing  banks  named  therein  and  the  lenders  named  therein  (incorporated  by 
reference  to  Exhibit  10.1  to  our  Quarterly  Report  on  Form  10-Q  for  the  quarterly  period  ended 
September 30, 2015). 

Form of Commercial Paper Dealer Agreement between Diamond Offshore Drilling, Inc. and the Dealer 
party  thereto  (incorporated  by  reference  to  Exhibit  10.1  to  our  Current  Report  on  Form  8-K  filed  on 
February 12, 2015). 

Retirement  Agreement  and  General  Release  between  Diamond  Offshore  Management  Company  and 
Lawrence  R.  Dickerson  dated  September  23,  2013  (incorporated  by  reference  to  Exhibit  10.1  to  our 
Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2013). 

Employment Agreement, dated as of February 12, 2014, between Diamond Offshore Drilling, Inc., and 
Marc Edwards (incorporated by reference to Exhibit 10.1 to our Quarterly Report on Form 10-Q for the 
quarterly period ended March 31, 2014). 

Separation  Agreement  and  General  Release,  dated  June  11,  2014,  between  Diamond  Offshore 
Management Company and William C. Long (incorporated by reference to Exhibit 10.1 to our Quarterly 
Report on Form 10-Q for the quarterly period ended June 30, 2014). 

12.1* 

Statement re Computation of Ratios. 

21.1* 

List of Subsidiaries of Diamond Offshore Drilling, Inc. 

23.1* 

Consent of Deloitte & Touche LLP. 

24.1* 

Power of Attorney (set forth on the signature page hereof). 

31.1* 

Rule 13a-14(a) Certification of the Chief Executive Officer. 

31.2* 

Rule 13a-14(a) Certification of the Chief Financial Officer. 

32.1* 

Section 1350 Certification of the Chief Executive Officer and Chief Financial Officer. 

101.INS** 

XBRL Instance Document. 

101.SCH**  XBRL Taxonomy Extension Schema Document. 

101.CAL**  XBRL Taxonomy Calculation Linkbase Document. 

101.LAB**  XBRL Taxonomy Label Linkbase Document. 

101.PRE**  XBRL Presentation Linkbase Document. 

101.DEF**  XBRL Taxonomy Extension Definition. 

*  Filed or furnished herewith. 
**  The  documents  formatted  in  XBRL  (Extensible  Business  Reporting  Language)  and  attached  as 
Exhibit 101 to this report are deemed not filed or part of a registration statement or prospectus for 
purposes of sections 11 or 12 of the Securities Act, are deemed not filed for purposes of section 18 

90 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
of the Exchange Act, and otherwise, not subject to liability under these sections. 

+  Management contracts or compensatory plans or arrangements. 

91 

 
 
 
            
  
 
 
 
BOARD OF DIRECTORS 

James S. Tisch  

Chairman of the Board,  

(cid:39)(cid:76)(cid:68)(cid:80)(cid:82)(cid:81)(cid:71)(cid:3)(cid:50)(cid:424)(cid:86)(cid:75)(cid:82)(cid:85)(cid:72)(cid:3)(cid:39)(cid:85)(cid:76)(cid:79)(cid:79)(cid:76)(cid:81)(cid:74)(cid:15)(cid:3)(cid:44)(cid:81)(cid:70)(cid:17)(cid:3)
(cid:51)(cid:85)(cid:72)(cid:86)(cid:76)(cid:71)(cid:72)(cid:81)(cid:87)(cid:3)(cid:9)(cid:3)(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:40)(cid:91)(cid:72)(cid:70)(cid:88)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)(cid:15)(cid:3) 

(cid:47)(cid:82)(cid:72)(cid:90)(cid:86)(cid:3)(cid:38)(cid:82)(cid:85)(cid:83)(cid:82)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)

Marc Edwards 

(cid:51)(cid:85)(cid:72)(cid:86)(cid:76)(cid:71)(cid:72)(cid:81)(cid:87)(cid:3)(cid:9)(cid:3)(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:40)(cid:91)(cid:72)(cid:70)(cid:88)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)(cid:15)(cid:3)

(cid:39)(cid:76)(cid:68)(cid:80)(cid:82)(cid:81)(cid:71)(cid:3)(cid:50)(cid:424)(cid:86)(cid:75)(cid:82)(cid:85)(cid:72)(cid:3)(cid:39)(cid:85)(cid:76)(cid:79)(cid:79)(cid:76)(cid:81)(cid:74)(cid:15)(cid:3)(cid:44)(cid:81)(cid:70)(cid:17)(cid:3)

John R. Bolton 

Senior Fellow, 

(cid:36)(cid:80)(cid:72)(cid:85)(cid:76)(cid:70)(cid:68)(cid:81)(cid:3)(cid:40)(cid:81)(cid:87)(cid:72)(cid:85)(cid:83)(cid:85)(cid:76)(cid:86)(cid:72)(cid:3)(cid:44)(cid:81)(cid:86)(cid:87)(cid:76)(cid:87)(cid:88)(cid:87)(cid:72)(cid:3)

Charles L. Fabrikant 

Executive Chairman &  

(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:40)(cid:91)(cid:72)(cid:70)(cid:88)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)(cid:15)(cid:3) 

(cid:54)(cid:40)(cid:36)(cid:38)(cid:50)(cid:53)(cid:3)(cid:43)(cid:82)(cid:79)(cid:71)(cid:76)(cid:81)(cid:74)(cid:86)(cid:15)(cid:3)(cid:44)(cid:81)(cid:70)(cid:17)

(cid:51)(cid:68)(cid:88)(cid:79)(cid:3)(cid:42)(cid:17)(cid:3)(cid:42)(cid:68)(cid:424)(cid:81)(cid:72)(cid:92)(cid:3)(cid:44)(cid:44)(cid:3)

President Emeritus, 

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Edward Grebow 

Managing Director,  

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Herbert C. Hofmann 

Retired Senior Vice President, 

(cid:47)(cid:82)(cid:72)(cid:90)(cid:86)(cid:3)(cid:38)(cid:82)(cid:85)(cid:83)(cid:82)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:3)

(cid:46)(cid:72)(cid:81)(cid:81)(cid:72)(cid:87)(cid:75)(cid:3)(cid:44)(cid:17)(cid:3)(cid:54)(cid:76)(cid:72)(cid:74)(cid:72)(cid:79)

Senior Vice President, 

(cid:47)(cid:82)(cid:72)(cid:90)(cid:86)(cid:3)(cid:38)(cid:82)(cid:85)(cid:83)(cid:82)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)

(cid:38)(cid:79)(cid:76)(cid:424)(cid:82)(cid:85)(cid:71)(cid:3)(cid:48)(cid:17)(cid:3)(cid:54)(cid:82)(cid:69)(cid:72)(cid:79)

Managing Partner, 

(cid:57)(cid:68)(cid:79)(cid:82)(cid:85)(cid:3)(cid:38)(cid:68)(cid:83)(cid:76)(cid:87)(cid:68)(cid:79)(cid:3)(cid:42)(cid:85)(cid:82)(cid:88)(cid:83)(cid:3)(cid:47)(cid:47)(cid:38) 

Andrew H. Tisch 

Co-Chairman of the Board, 

(cid:47)(cid:82)(cid:72)(cid:90)(cid:86)(cid:3)(cid:38)(cid:82)(cid:85)(cid:83)(cid:82)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)

(cid:53)(cid:68)(cid:92)(cid:80)(cid:82)(cid:81)(cid:71)(cid:3)(cid:54)(cid:17)(cid:3)(cid:55)(cid:85)(cid:82)(cid:88)(cid:69)(cid:75)(cid:3)

Financial Consultant

EXECUTIVE OFFICERS  
Marc Edwards  

President &  

(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:40)(cid:91)(cid:72)(cid:70)(cid:88)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)

(cid:47)(cid:92)(cid:81)(cid:71)(cid:82)(cid:79)(cid:3)(cid:47)(cid:17)(cid:3)(cid:39)(cid:72)(cid:90)(cid:3)

Senior Vice President,  

(cid:58)(cid:82)(cid:85)(cid:79)(cid:71)(cid:90)(cid:76)(cid:71)(cid:72)(cid:3)(cid:50)(cid:83)(cid:72)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)

(cid:42)(cid:68)(cid:85)(cid:92)(cid:3)(cid:55)(cid:17)(cid:3)(cid:46)(cid:85)(cid:72)(cid:81)(cid:72)(cid:78)(cid:3)

Senior Vice President & 

(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:41)(cid:76)(cid:81)(cid:68)(cid:81)(cid:70)(cid:76)(cid:68)(cid:79)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)

(cid:39)(cid:68)(cid:89)(cid:76)(cid:71)(cid:3)(cid:47)(cid:17)(cid:3)(cid:53)(cid:82)(cid:79)(cid:68)(cid:81)(cid:71)(cid:3) 
Senior Vice President,  

Aaron Sobel 

Vice President, 

(cid:43)(cid:88)(cid:80)(cid:68)(cid:81)(cid:3)(cid:53)(cid:72)(cid:86)(cid:82)(cid:88)(cid:85)(cid:70)(cid:72)(cid:86)

Terence W. Waldorf

Vice President, Deputy General Counsel  

General Counsel & Secretary

(cid:9) Assistant Secretary

Ronald Woll  

Senior Vice President &  

(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:38)(cid:82)(cid:80)(cid:80)(cid:72)(cid:85)(cid:70)(cid:76)(cid:68)(cid:79)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)

Beth G. Gordon 

Controller & 

(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:36)(cid:70)(cid:70)(cid:82)(cid:88)(cid:81)(cid:87)(cid:76)(cid:81)(cid:74)(cid:3)(cid:50)(cid:427)(cid:70)(cid:72)(cid:85)

SENIOR MANAGEMENT 

Mark F. Baudoin  

Senior Vice President, 

(cid:36)(cid:71)(cid:80)(cid:76)(cid:81)(cid:76)(cid:86)(cid:87)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)

Stephen G. Elwood

Senior Vice President, 

(cid:55)(cid:68)(cid:91)(cid:3)

Karl S. Sellers

Senior Vice President, 

(cid:55)(cid:72)(cid:70)(cid:75)(cid:81)(cid:76)(cid:70)(cid:68)(cid:79)(cid:3)(cid:54)(cid:72)(cid:85)(cid:89)(cid:76)(cid:70)(cid:72)(cid:86)

Neil Hall

Vice President, 

(cid:43)(cid:72)(cid:68)(cid:79)(cid:87)(cid:75)(cid:15)(cid:3)(cid:54)(cid:68)(cid:73)(cid:72)(cid:87)(cid:92)(cid:3)(cid:9)(cid:3)(cid:40)(cid:81)(cid:89)(cid:76)(cid:85)(cid:82)(cid:81)(cid:80)(cid:72)(cid:81)(cid:87)

Tri Le

Vice President, 

(cid:54)(cid:88)(cid:69)(cid:86)(cid:72)(cid:68)

Kane Liddelow

Vice President, 

(cid:38)(cid:82)(cid:81)(cid:87)(cid:85)(cid:68)(cid:70)(cid:87)(cid:86)(cid:3)(cid:9)(cid:3)(cid:48)(cid:68)(cid:85)(cid:78)(cid:72)(cid:87)(cid:76)(cid:81)(cid:74)(cid:3)

Richard L. Male

Vice President, 

(cid:38)(cid:82)(cid:81)(cid:87)(cid:85)(cid:68)(cid:70)(cid:87)(cid:86)(cid:3)(cid:9)(cid:3)(cid:48)(cid:68)(cid:85)(cid:78)(cid:72)(cid:87)(cid:76)(cid:81)(cid:74)

(cid:45)(cid:76)(cid:80)(cid:80)(cid:92)(cid:3)(cid:53)(cid:17)(cid:3)(cid:48)(cid:82)(cid:82)(cid:85)(cid:72)

Vice President, 

(cid:50)(cid:83)(cid:72)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)

Tim Osburn 

CIO

Jon Richards 

Vice President, 

(cid:50)(cid:83)(cid:72)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)

Scott L. Kornblau

Treasurer

CORPORATE INFORMATION 

Corporate Headquarters  

15415 Katy Freeway  

Houston, TX 77094  

(281) 492-5300  

(cid:90)(cid:90)(cid:90)(cid:17)(cid:71)(cid:76)(cid:68)(cid:80)(cid:82)(cid:81)(cid:71)(cid:82)(cid:424)(cid:86)(cid:75)(cid:82)(cid:85)(cid:72)(cid:17)(cid:70)(cid:82)(cid:80)(cid:3)

(cid:44)(cid:81)(cid:89)(cid:72)(cid:86)(cid:87)(cid:82)(cid:85)(cid:3)(cid:53)(cid:72)(cid:79)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86) 

Darren Daugherty 

Director, Investor Relations 

15415 Katy Freeway 

Houston, TX 77094 

(281) 492-5370

(cid:49)(cid:82)(cid:87)(cid:76)(cid:70)(cid:72)(cid:3)(cid:82)(cid:73)(cid:3)(cid:36)(cid:81)(cid:81)(cid:88)(cid:68)(cid:79)(cid:3)(cid:48)(cid:72)(cid:72)(cid:87)(cid:76)(cid:81)(cid:74)(cid:3)

The Annual Meeting of Stockholders will 

be held on Tuesday, May 17, 2016, at  

8:30 (cid:68)(cid:80)(cid:3)(cid:68)(cid:87)(cid:3)(cid:87)(cid:75)(cid:72)(cid:3)(cid:82)(cid:427)(cid:70)(cid:72)(cid:86)(cid:3)(cid:82)(cid:73)(cid:3)(cid:47)(cid:82)(cid:72)(cid:90)(cid:86)(cid:3)(cid:38)(cid:82)(cid:85)(cid:83)(cid:82)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:15)(cid:3)

667 Madison Avenue, New York, NY 10065.

(cid:55)(cid:85)(cid:68)(cid:81)(cid:86)(cid:73)(cid:72)(cid:85)(cid:3)(cid:36)(cid:74)(cid:72)(cid:81)(cid:87)(cid:3)(cid:9)(cid:3)(cid:53)(cid:72)(cid:74)(cid:76)(cid:86)(cid:87)(cid:85)(cid:68)(cid:85)(cid:3)

Computershare 

PO Box 30170

College Station, TX 77842 

(877) 812-4207 

www.computershare.com/investor

(cid:54)(cid:87)(cid:82)(cid:70)(cid:78)(cid:3)(cid:40)(cid:91)(cid:70)(cid:75)(cid:68)(cid:81)(cid:74)(cid:72)(cid:3)(cid:47)(cid:76)(cid:86)(cid:87)(cid:76)(cid:81)(cid:74)(cid:3)

New York Stock Exchange 

Trading Symbol “DO” 

(cid:44)(cid:81)(cid:71)(cid:72)(cid:83)(cid:72)(cid:81)(cid:71)(cid:72)(cid:81)(cid:87)(cid:3)(cid:36)(cid:88)(cid:71)(cid:76)(cid:87)(cid:82)(cid:85)(cid:86)(cid:3)

Deloitte & Touche (cid:47)(cid:47)(cid:51)

Design / Rigsby Hull, Houston

Printing / RR Donnelley 

Photography / Drew Donovan,  

Jack Prather and Chris Shinn