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Goldman Sachs Global Energy Conference January 2013

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Statements made today that are not historical facts are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements include words or phrases such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan,” “project,” “could,” “may,” “might,” “should,” “will” and similar words and specifically include statements regarding the timing of delivery, mobilization, contract commencement, relocation or other movement of rigs. Such statements are subject to numerous risks, uncertainties and assumptions that may cause actual results to vary materially from those indicated, including governmental regulatory, legislative and permitting requirements affecting drilling; downtime and other risks associated with offshore rig operations, relocations, severe weather or hurricanes; possible cancellation or suspension of drilling contracts as a result of mechanical difficulties, performance or other reasons; risks inherent to shipyard rig construction, repair, maintenance or enhancement; and actual contract commencement dates. In addition to the numerous factors described above, you should also carefully read and consider “Item 1A. Risk Factors” in Part I and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II of our most recent annual report on Form 10-K, as updated in our subsequent quarterly reports on Form 10-Q, which are available on the SEC’s website at www.sec.gov or on the Investor Relations section of our website at www.enscoplc.com. Each forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to publicly update or revise any forward looking statements, except as required by law.

Forward-Looking Statements

http://www.sec.gov/http://www.enscoplc.com/

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Vision and Strategy

Invest in High-Quality Fleet Talented Workforce Trained on Proven Systems Global Platform

Operational Excellence Strong Safety Record

Leader in Customer Satisfaction

Superior Margins/ Return on Capital

Increase Shareholder Value

Vision As the offshore driller of choice, we will go beyond what is

expected to achieve a safe zero-incident workplace and to be the clear choice among employees, customers and investors

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• Growth and income story

• #1 in customer satisfaction

• Newest ultra-deepwater fleet

• Largest active premium jackup fleet

• Wide range of enhanced drilling technologies

– drillships, semis, premium jackups

• Global presence

• Disciplined risk management

• Strong financial position

Profile

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9 13 6 46

PREMIUM JACKUP RIGS

ULTRA & DEEP WATER DRILLSHIPS

MOORED SEMISUBMERSIBLES

DYNAMICALLY POSITIONED SEMISUBMERSIBLES

Note: Includes rigs under construction or on order (December 2012)

Wide Range Capabilities

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ESV SDRL RIG NE DO

3 3

9 11

22 Years

Avg. Age of Fleet

Source: IHS-ODS Petrodata – December 2012 – Ultra-deepwater includes competitive semisubmersibles and drillships able to drill in 7,500’ and greater water depths including rigs that are cold stacked. Average age excludes rigs under construction or on order. Ensco has three drillships under construction. Average age is not adjusted for upgrades.

Newest Ultra-Deepwater Fleet (≥ 7,500’)

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SDRL ESV RIG NE DO

3

8

15

19

27 Years

Source: IHS-ODS Petrodata – December 2012 – Deepwater includes competitive semisubmersibles and drillships able to drill in 4,500’ and greater water depths including rigs that are cold stacked. Average age excludes rigs under construction or on order. Ensco has three drillships under construction. Average age is not adjusted for upgrades.

2nd Youngest Deepwater Fleet (≥ 4,500’)

Avg. Age of Fleet

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Deepwater Fleet Utilization (≥ 4,500’)

3Q12 Utilization

ESV

DO

SDRL

RIG

NE

90%

84%

82%

81%

78%

Source: 3Q12 company filings; NE utilization represents drillship and semisubmerisble utilization, regardless of water depth.

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ESV

NE

RDC

SDRL

RIG

DO

40

36

29

14

9

6

Source: IHS-ODS Petrodata – December 2012 – Premium jackups include competitive, 250’ and larger independent-leg rigs and harsh standard jackups. Active does not include rigs cold stacked, under construction or on order.

Largest Active Premium Jackup Fleet

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• $1 billion+ invested in existing jackup fleet since 2005

• $700 million+ committed to build three ultra-premium ENSCO 120 Series jackups

• More 400’ water depth jackups than any other driller

• All marketed jackups are contracted

1Q 2Q 3Q 4Q 1Q 2Q 3Q

72% 77%

83%

90% 93% 94% 92%

Ensco Jackup Utilization*

Premium Jackup Fleet Overview

*Ensco legacy jackup fleet

2011

2012

11

RIG

ESV

NE

DO

SDRL

RDC

99

74

73

44

43

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World’s 2nd Largest Offshore Rig Fleet

Source: IHS-ODS Petrodata – December 2012 – Numbers include competitive industry-wide semisubmersibles, drillships and premium jackups, including rigs under construction or on order. Premium jackups include 250’ and larger independent leg rigs and harsh environment standard jackups. Figures exclude submersible rigs chartered to third parties and floating production and storage units.

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U.S. Gulf of Mexico

Ships 2

Semis 6

Jackups 10

Africa

Ships 3

Semis 1

Europe & Mediterranean

Semi 1

Jackups 8

Middle East

Jackups 10

Asia Pacific

Semi 2

Jackups 11

Mexico

Jackups 4

Brazil

Ship 1

Semis 9 Under Construction

Ships 3

Jackups 3

Global Platform

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ENSCO 8500 Series® (7)

Samsung DP-3 Drillships (7)

Megathyst DP-3 Semisubmersibles (4)

Premium KFELS Jackup Mod V-A,B + Super A (11)

Shipyard

Common Equipment

Training

Repair & Maintenance

Spare Parts

Benefits of Standardization

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ENSCO 8500

ENSCO 8501

ENSCO 8502

ENSCO 8503

ENSCO 8504

ENSCO 8505

ENSCO 8506

Standardization ̶ A Marketing Advantage

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Success of the ENSCO DS Series

BP Has Contracted 3 Drillships

ENSCO DS-3: U.S. Gulf of Mexico ENSCO DS-4: Brazil ENSCO DS-6: Angola

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2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Semisubmersibles Premium jackups Drillships

17 Delivered 6 Under Construction

2

1 1 1

2

1

4

2

3

Organic Growth from Newbuild Program

3 3

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2012 2013 2014 2015

ENSCO DS-7

ENSCO 120

ENSCO 121

ENSCO 122

ENSCO DS-8

ENSCO DS-9

Premium jackups

2012

Contracted

2013

Newbuild Delivery Schedule

2014

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• Three under construction

• $700 million+ investment

• 40,000’ total drilling depth

• 400’ water depth

• 2.5 million pound quad derrick

• State-of-the-art cantilever

envelope

• Ultra-deep gas/long-reach wells

ENSCO 120 Series Ultra-Premium Jackups

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Deep & Ultra-Deepwater Drilling Opportunity 1990s Proven

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U.S. Gulf of Mexico

Ships 2

Semis 6

Jackups 10

Africa

Ships 3

Semis 1

Europe & Mediterranean

Semi 1

Jackups 8

Middle East

Jackups 10

Asia Pacific

Semi 2

Jackups 11

Mexico

Jackups 4

Brazil

Ship 1

Semis 9 Under Construction

Ships 3

Jackups 3

Global Platform

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Offshore Reserves

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

45,000

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

mmboe Cumulative Global DeepwaterReserves Discovered

Source: PFC Energy

Brazil

GOM

Norway

Equatorial Margin

Nigeria

UK

AngolaAustralia

; represents commercially declared reserves

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Distribution of Reserves by Water Depth

0-300 300-400 400-1,000 1,000-5,000 5,000-7,500 7,500+

Reserve Water Depth

Middle East 12.5 bn boe Middle East 468.2 bn boe

Mexico 9.2 bn boe

US GoM 10.7 bn boe

NW Europe 26.8 bn boe

SS Africa 63.4 bn boe

Asia Pacific 94.8 bn boe

Brazil 17.3 bn boe

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• Proven rig designs, equipment and shipyards

• Established operating and safety management systems

• Diversification

– Global presence

– Fleet composition

– Customer base

• Strong financial position

Disciplined Risk Management

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• Achieve a zero-incident workplace

• Executive management passion and commitment

• Authority to stop work

• Dedicated SHE personnel – corporate/region/rig

• Comprehensive training programs

• Quality control and audit

• Dedicated safety management systems

• Root-cause analysis to prevent recurrence of incidents

Safety, Health & Environment

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International Association of Drilling Contractors (IADC) has awarded accreditation to Ensco training programs

• Focus on safety and efficiency of operations

• Defined policies and procedures

• Systems to ensure continuous development, monitoring and compliance around the globe

• Audited by Core Value Teams to maintain high standards

Competency Assurance Program

Commitment to Employee Development

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Rated #1 • Total Satisfaction

• Health, Safety & Environment

• Job Quality

• Performance & Reliability

• Deepwater Drilling

• Technology

• Special Drilling Applications

• International

• North Sea

• Latin America & Mexico

• Non-Vertical Wells

• Shelf Wells

• Independent Operators

Industry Leader in Customer Satisfaction

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EnergyPoint Survey Results – 3Q12

OFFSHORE DRILLERS

TOTAL SATISFACTION * Rating Trend Ensco VERY HIGH STEADY Diamond Offshore AVERAGE STEADY Noble Drilling AVERAGE STEADY Rowan HIGH UP Seadrill LOW STEADY Transocean AVERAGE STEADY GROUP AVERAGE AVERAGE STEADY * Overall satisfaction; willingness to recommend to others

JOB QUALITY ** Rating Trend Ensco VERY HIGH STEADY Diamond Offshore AVERAGE STEADY Noble Drilling HIGH STEADY Rowan HIGH UP Seadrill VERY LOW DOWN Transocean LOW STEADY GROUP AVERAGE AVERAGE STEADY ** Ability to complete jobs on schedule and as specified; quality of pre-job planning and design; quality of post-job reporting and review; ability to apply lessons learned and continually improve.

Note: Ratings based on trailing 24-month average as of third quarter 2012 report

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EnergyPoint Survey Results – 4Q12

OFFSHORE DRILLERS

TOTAL SATISFACTION * Rating Trend Ensco VERY HIGH UP Diamond Offshore AVERAGE STEADY Noble Drilling AVERAGE STEADY Rowan AVERAGE STEADY Seadrill AVERAGE UP Transocean AVERAGE DOWN GROUP AVERAGE AVERAGE STEADY * Overall satisfaction; willingness to recommend to others

PERFORMANCE & RELIABILITY ** Rating Trend Ensco HIGH STEADY Diamond Offshore AVERAGE STEADY Noble Drilling HIGH STEADY Rowan AVERAGE STEADY Seadrill AVERAGE STEADY Transocean LOW DOWN GROUP AVERAGE AVERAGE STEADY ** Quality and reliability of field personnel; quality and reliability of office personnel; quality, reliability and condition of field equipment.

Note: Ratings based on trailing 24-month average as of fourth quarter 2012 report

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• $9 billion of contracted revenue backlog

• Baa1/BBB+ ratings from Moody’s/S&P

• Broad diversification: fleet, markets and customers

Strong Financial Position

SDRL RIG NE ESV DO RDC

63%

48% 38%

29% 25% 24%

Leverage Ratios

Source: As of 30 Sept 2012 for revenue backlog. ISI Group statistics for leverage ratios (31 October 2012).

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• $1.50 per share cash dividend annualized

• Revenue backlog/projected cash flows support newbuild

program and debt maturities

• U.K. domicile benefits

• $1.9 billion of revolving credit facilities

• Competitive weighted average cost of capital

Maintain Flexibility

Capital Management

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2012 2013 2014 2015

1.3 0.9 0.9

0.3

0.2

Newbuild Rigs Rig Enhancements Sustaining

Capital Commitments

Note: 2013 and 2014 newbuild capital expenditures represent remaining outstanding contractual commitments for newbuild construction as of 9/30/12 (shown in dark blue).

Capital for Rig Enhancements and Sustaining projects for 2013 through 2015 TBD

$ billions

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• #1 in customer satisfaction

• Newest ultra-deepwater fleet

• Largest active premium jackup fleet

• Fleet standardization

• Global presence

• Disciplined risk management

• Strong financial position

Summary

Invest in High-Quality Fleet Talented Workforce Trained on Proven Systems Global Platform

Operational Excellence Strong Safety Record

Leader in Customer Satisfaction

Superior Margins/ Return on Capital

Increase Shareholder Value

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Sean O’Neill VP – Investor Relations and Communications 713-430-4607

Nick Georgas Manager – Investor Relations

713-430-4490

Goldman Sachs Global�Energy Conference��Forward-Looking StatementsVision and StrategyProfileWide Range CapabilitiesNewest Ultra-Deepwater Fleet (≥ 7,500’)2nd Youngest Deepwater Fleet (≥ 4,500’)Deepwater Fleet Utilization (≥ 4,500’)Largest Active Premium Jackup FleetPremium Jackup Fleet OverviewWorld’s 2nd Largest Offshore Rig FleetGlobal PlatformBenefits of StandardizationStandardization ̶ A Marketing AdvantageSuccess of the ENSCO DS SeriesOrganic Growth from Newbuild ProgramNewbuild Delivery ScheduleENSCO 120 Series Ultra-Premium JackupsDeep & Ultra-Deepwater Drilling OpportunityGlobal PlatformOffshore ReservesDistribution of Reserves by Water DepthDisciplined Risk ManagementSafety, Health & EnvironmentCompetency Assurance Program Industry Leader in Customer SatisfactionEnergyPoint Survey Results – 3Q12EnergyPoint Survey Results – 4Q12Strong Financial PositionCapital ManagementCapital CommitmentsSummarySlide Number 33