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Howard WeilEnergy Conference

March 2014

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Forward-Looking Statements

Statements made today that are not historical facts are forward-looking statements within the meaningof Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of1934. Forward-looking statements include words or phrases such as “anticipate,” “believe,” “estimate,”“expect,” “intend,” “plan,” “project,” “could,” “may,” “might,” “should,” “will” and similar words andspecifically include statements regarding the timing of delivery, mobilization, contract commencement,relocation or other movement of rigs. Such statements are subject to numerous risks, uncertainties andassumptions that may cause actual results to vary materially from those indicated, includinggovernmental regulatory, legislative and permitting requirements affecting drilling; downtime and otherrisks associated with offshore rig operations, relocations, severe weather or hurricanes; possiblecancellation or suspension of drilling contracts as a result of mechanical difficulties, performance orother reasons; risks inherent to shipyard rig construction, repair, maintenance or enhancement; andactual contract commencement dates. In addition to the numerous factors described above, you shouldalso carefully read and consider “Item 1A. Risk Factors” in Part I and “Item 7. Management’s Discussionand Analysis of Financial Condition and Results of Operations” in Part II of our most recent annualreport on Form 10-K, as updated in our subsequent quarterly reports on Form 10-Q, which are availableon the SEC’s website at www.sec.gov or on the Investor Relations section of our website atwww.enscoplc.com. Each forward-looking statement speaks only as of the date of the particularstatement, and we undertake no obligation to publicly update or revise any forward looking statements,except as required by law.

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Agenda

• Highlight major accomplishments and competitive position

• Strategy and process

• Supply and demand considerations

• Bright future ahead

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Dividend Growth

Nov. 2009 Apr. 2010 Feb. 2012 Feb. 2013 Nov. 2013

$0.10

$1.40 $1.50

$2.00

$3.00

Note: Dividend announcement date

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SDRL NE RIG RDC DO ESV

67%

40% 39% 37% 35%27%

Leverage Ratios

Strong Financial Position

Source: Total debt-to-capital ratios from ISI Group Oil Services Data & Valuation Handbook 28 February 2014.

• $11 billion of contracted revenue backlog

• Baa1/BBB+ ratings from Moody’s/S&P

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SDRL DO RIG NE ESV RDC

151%

89%73%

52% 49%

20%

Source: Thomson Reuters; most recent declared quarterly dividend annualized divided by 2013 earnings per share for dividend-paying offshore drillers. RIG and NE reflect dividends of $3.00 and $1.50 per share annually, respectively.

Payout Ratios

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Net Income Margin

Source: Thomson One; sum of trailing eight quarters of net income divided by sum of trailing eight quarters of revenue

ESV SDRL DO NE RDC RIG

29%

23% 23%

16% 16% 14%

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Rated #1• Total Satisfaction

• Performance and Reliability

• Deepwater Drilling

• Shelf Wells

• Technology

• Horizontal and Directional Wells

• Special Applications

• North Sea

Industry Leader in Customer Satisfaction

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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

VisionAs 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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Fleet Highgrading

• Six newbuild rigs to be delivered through 2016

• $570 million of budgeted rig enhancements to existing fleet in 2014

– ~$200 million of rig enhancements are customer-funded

• 13 rigs sold since 2009

– $80 million pre-tax gain on sales

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SDRL ESV NE RIG DO

3.23.9

8.49.3

19.7Years

New Ultra-Deepwater Fleet (≥ 7,500’)

Avg. Age of Fleet

Source: IHS-ODS Petrodata as of 1 March 2014 – 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.

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2014 2015 2016

ENSCO 122

ENSCO DS-8

ENSCO DS-9

ENSCO 110

ENSCO DS-10

ENSCO 123

Drillships Premium jackups

Newbuild Delivery Schedule

3Q14 4Q141Q14 2Q14 1Q15 2Q15 3Q15 4Q15 1Q16 2Q16

Contracted

Contracted

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Floater Upgrades

• Major upgrades to several rigs

– ENSCO 5005

– ENSCO 5006

– ENSCO DS-2

– ENSCO 6001 and ENSCO 6002

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• Largest premium jackup fleet

• $1.3 billion committed to build four ultra-premium ENSCO 120 Series jackups and one premium jackup, ENSCO 110

Premium Jackup Fleet Overview

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• Two under construction

• $1 billion+ 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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U.S. Gulf of Mexico

Ships 3

Semis 6

Jackups 8

Africa

Ships 4

Semis 2

Europe & Mediterranean

Semi 1

Jackups 10

Middle East

Jackups 10

Asia Pacific

Semi 4

Jackups 10

Mexico

Jackups 4

Brazil

Semis 6

Under Construction

Ships 3

Jackups 3

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Global Platform

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ENSCO 8500 Series® (7)

Samsung DP3 Drillships (8)

Megathyst DP3 Semisubmersibles (4)

Premium KFELS Jackup Mod V-A,B + Super A (13)

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

StandardizationRepeat Customers See the Benefits

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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 / U.S. GOM

ENSCO DS-6: Angola

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• Record TRIR in 2013

• Zero-incident goal

• STOP work authority

• Comprehensive training

• Quality control and audit

• Dedicated safety

management systems

Safety, Health & Environment

0.0

0.2

0.4

0.6

0.8

1.0

1.2

2008 2009 2010 2011 2012 2013

Ensco Industry

Total RecordableIncident Rate

Note: 2013 TRIR for Industry is as of 3Q14.

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Competency Assurance Program

Commitment to Employee Development

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

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• Rigs under construction

– 27 new floaters and 32 new jackups to be delivered in 2014

– 13 uncontracted floaters and 24 uncontracted jackups

• Aging global fleet

– 55% of jackups and 37% of floaters are older than 30 years

• Constraints for additional rig orders

– shipyard / equipment provider constraints

– crewing rigs with experienced personnel

– rising construction costs for jackup rigs

Supply Considerations

Source: IHS-ODS Petrodata as of 1 March 2014

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• Marketed utilization for global fleet

– 95% for floaters

– 94% for jackups

• New discoveries lead to additional appraisal and developmental drilling

– 70+ new discoveries per year on average since 2009

• Deepwater well programs taking longer to drill

Demand Considerations

Note: February 2014 – Marketed Utilization from IHS Petrodata World Rig Forecast; new discoveries include all discoveries in greater than 1,000’ water depth since 2009 from IHS GDC Watch-List.

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• Stable commodity prices above the economic breakeven for our customers

• Brazil to develop pre-salt basins

• Energy reform in Mexico to expand floater market

• Customer demand more diversified

– NOCs driven by domestic economy and politics

– Independent oil companies growing capex

Demand Considerations

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2014 2015 2016 2017

1.40

0.600.23

0.57

0.30

Newbuild Construction Rig Enhancements Sustaining

Estimated Capital Expenditures

$ billions

Sustaining

Enhancements

Newbuild

Source: 4Q13 Earnings Call

Note: Final rig enhancement and sustaining project capital expenditure budgets for 2015 –2017 TBD once budgets are completed

$200 million of rig enhancement capex to be funded by customers

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• Top 5% dividend yield – S&P 500

• Strong balance sheet and capital management flexibility

• #1 in customer satisfaction

• New ultra-deepwater rigs and largest premium jackup fleet

• Global presence

• Safety and operational excellence

• Superior financial results

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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