Ensco plc Fleet Status Report Introduction This Fleet Status Report reflects the 31 May 2011 acquisition of Pride International. Details included in the report are as of Ensco's last Fleet Status Report on 16 May 2011 and Pride International's last Fleet Status Report on 4 May 2011. Forward Looking Statements Disclosure Ensco has rejected all force majeure notices received since the Macondo well incident as invalid under the terms of the applicable drilling contracts. During mid-December 2010, Ensco received a force majeure notice from Nexen regarding ENSCO 8501. Following delivery of the force majeure notice, Nexen paid the low-$280,000 force majeure rate (75% of the mid-$370,000 applicable day rate at the time) under recent invoices. Ensco, in turn, notified Nexen that it is in default, which Nexen has denied. Ensco is reviewing available remedies to resolve the dispute. Statements contained in this Fleet Status Report that are not historical facts are forward-looking statements made pursuant to the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include references to the status of our U.S. Gulf of Mexico contracts in general and potential force majeure in particular, future rig rates, cost adjustments, utilization, our estimated rig availability, contract duration, customers or contract status (including executory contracts and letters of intent) rig enhancement projections, shipyard construction or work completion, and other contract or letter of intent commitments, including new rig commitments, contract terms, the period of time and number of rigs that will be in a shipyard for repairs, maintenance, enhancement or construction and scheduled delivery dates for new rigs. Numerous factors could cause actual results to differ materially from those contemplated in the forward-looking statements, including: any regulatory, judicial or legislative activity that may impact our U.S. Gulf of Mexico operations or that may adversely affect our existing drilling contracts for our drillships, ENSCO 8500 Series ® rigs or our other U.S. Gulf of Mexico rigs, such as a determination of a force majeure event; the impact of the Macondo well incident, and the government and industry response thereto, upon future deepwater and other offshore drilling operations in general, and, in particular, any new actual or defacto moratorium or suspension of drilling operations or delays in processing drilling permits; legislative or regulatory action impacting rig equipment, pollution liability or other matters relating to U.S. or global offshore drilling activities; industry conditions and competition, including changes in rig supply and demand or new technology; prices of oil and natural gas, and their impact upon future levels of drilling activity and expenditures; declines in drilling activity, which may cause us to idle or stack additional rigs; excess rig availability or increased supply resulting from delivery of newbuild drilling rigs or reactivation of stacked rigs or a slowdown in offshore drilling; concentration of our fleet in premium jackups; concentration of our deepwater rigs in the U.S. Gulf of Mexico, cyclical nature of the industry; worldwide expenditures for oil and natural gas drilling; operational risks, including unplanned downtime due to drilling moratoria or suspensions, regulatory, legislative or permitting requirements, rig or equipment failure, damage or repair in general and hazards created by severe storms and hurricanes in particular; changes in the dates our rigs will enter a shipyard, be delivered, return to service or enter service; risks inherent to shipyard rig construction, repair or enhancement, including risks associated with concentration of our drillship, ENSCO 8500 Series ® and jackup rig construction contracts in two shipyards, unexpected delays in equipment delivery and engineering, equipment or design issues following shipyard delivery; changes in the commencement dates of new contracts; early termination, renegotiation, nullification, cancellation or breach of contracts or letters of intent with customers or other parties, including failure to negotiate definitive contracts following announcements or receipt of letters of intent; completion of contracts earlier than expected, risks associated with mediation, arbitration or litigation in general; risks associated with offshore rig operations or rig relocations; availability of transport vessels to relocate rigs; self-imposed or regulatory limitations on drilling locations during hurricane season; impact of current and future government laws and regulations and interpretations, modifications or repeal thereof, affecting the oil and gas industry in general and our equipment and operations in particular, including environmental liability, financial responsibility, insurance requirements or taxation; our ability to attract and retain skilled personnel; governmental action and political and economic uncertainties, including expropriation, nationalization, confiscation or deprivation of our assets; terrorism or military action impacting our operations, assets or financial performance. The factors identified above are believed to be important factors (but not necessarily all of the important factors) that could cause actual results to differ materially from those expressed in any forward-looking statement made by us. Other factors not discussed herein could also have material adverse effects on us such as other risks as described from time to time as Risk Factors and otherwise in the Company’s SEC filings. Copies of such SEC filings may be obtained at no charge by contacting our Investor Relations Department at 214-397-3045 or by referring to the Investor Relations section of our website at www.enscoplc.com. All forward-looking statements included in this Fleet Status Report are expressly qualified in their entirety by the foregoing cautionary statements. All information in this report is as of the date posted. The Company undertakes no duty to update any forward-looking statement, to conform the statement to actual results, reflect changes in the Company's expectations or otherwise update any forward-looking statement (or its associated cautionary language), whether as a result of new information or future events. Important Note Regarding U.S. Gulf of Mexico: Certain Ensco rigs in the U.S. Gulf of Mexico have been and may be further affected by the regulatory developments and other actions that have or may be imposed by the U.S. Department of the Interior including the regulations issued on 30 September 2010. The moratoriums/suspensions (which have been lifted), related Notices to Lessees (NTLs) and regulatory pronouncements, delays in processing drilling permits and other actions are being challenged in litigation by Ensco and others. Ensco rig utilization and day rates have been negatively influenced due to regulatory requirements and delays in our customers’ ability to secure drilling and associated permits. Current or future NTLs or other directives, legislation or regulations may further impact our customers' ability to obtain permits and commence or continue deep- or shallow- water operations in the U.S. Gulf of Mexico. At present, we are unable to determine the full extent that these factors will impact our contracts, operations and/or financial results. We continue to work with our customers on mutually agreeable contingency plans for our rigs in the U.S. Gulf of Mexico and, in certain cases, we have negotiated sublet agreements with new deepwater customers and/or reduced day rates. The full impact of the government’s actions and the regulations discussed in this note and potential new regulatory, legislative or permitting requirements has not yet been determined, but could have a further material adverse effect upon our results of operations. In the event of valid force majeure circumstances, the contracts for our ultra-deepwater semisubmersible rigs currently in the U.S. Gulf of Mexico generally provide that a reduced rate applies for a specified number of days (approximately ten weeks depending on the contract) after which our customers have a right to terminate subject to payment of a significant portion of the day rate for the remainder of the contract term. For our jackup rigs in the U.S. Gulf of Mexico, the contractual force majeure provisions generally provide for payment of full day rate for a specified number of days (up to 30 days) after which our customers have a right to terminate without further payment. Segment / Region / Rig Design (1) Water Depth' (1) Customer/ Status Day Rate $000's US Location Est. Avail / Contract Change Comments Deepwater ENSCO DS-3 Drillship, DP3 Samsung 12000 BP Low 540s Gulf of Mexico 4Q15 Currently finalizing client requested modifications and waiting for BP to designate the first drilling location. Subject to final documentation, we have agreed with BP that the rig will remain on the special standby dayrate of low 360s until 1 June 2011, at which time the applicable day rate of low 540s will begin, along with commencement of the five-year term contract ENSCO DS-4 Drillship, DP3 Samsung 12000 BP High 590s Gulf of Mexico 1Q16 In the process of completing client requested modifications and upgrades. The special standby dayrate will continue until the earlier of 1 July 2011 or the commencement of mobilization, which is expected to begin in late May 2011 ENSCO DS-5 Drillship, DP3 Samsung 12000 Petrobras Low 500s Gulf of Mexico 2Q16 Enroute to U.S. Gulf of Mexico ENSCO 8500 Semisubmersible DP 8500 Eni/Anadarko Low 300s Gulf of Mexico Aug. 13 Lump sum payment of $20 million and one-time reimbursable costs of $27 million amortized over primary contract term, which equals approx. $31,000 per day. Plus cost adjustments and four 1-year same-rate options ENSCO 8501 Semisubmersible DP 8500 Nexen/Noble Energy Low 380s Gulf of Mexico Jun. 13 Currently allocated to Noble. For Nexen's allocation of rig time, see Important Note Regarding U.S. Gulf of Mexico. Mob and upgrade costs are reimbursed by Noble and Nexen at approx. $19,000 per day over primary contract term. Plus cost adjustments and unpriced options ENSCO 8502 (2) Semisubmersible DP 8500 Nexen Special rate Gulf of Mexico Jul. 13 On special rate to Nexen until rig begins mob to Nexen's 1st drilling location. Then original 2-year term commences, low 490s. See 29 Oct. 2010 press release. Mob day rate and reimbursable mobilization expenses and upgrades to be amortized over Nexen's primary contract term are approx. $35,000 per day once term commences ENSCO 8503 (2) Semisubmersible DP 8500 Tullow/Cobalt High 430s French Guiana Aug. 11 Sublet to Tullow to Aug. 11. Mob/demob of approx. 50 days in total at 75% of day rate (i.e. mid 320s). Then either contracted to Cobalt at special rate of $210,000 until rig begins mob to Cobalt's 1st drilling location or original 2-year term commences, mid 530s. See 1 Dec. 2010 press release. Reimbursable expenses and upgrades to be amortized over Cobalt's primary contract term are approx. $49,000 per day once term commences Brazil ENSCO 6001 Semisubmersible - DP Amethyst 2 5000 Petrobras Mid 250s Brazil Jun. 13 Contract provides for a performance bonus of up to 15%, which is excluded from the referenced dayrate ENSCO 6002 Semisubmersible - DP Amethyst 2 5600 Petrobras Mid 250s Brazil Jul. 13 Contract provides for a performance bonus of up to 15%, which is excluded from the referenced dayrate ENSCO 6003 Semisubmersible - DP Amethyst 2 5700 Petrobras Low 300s Brazil Jan. 17 50 days shipyard/transit. Contract provides for a performance bonus of up to 15%, which is excluded from the referenced dayrate ENSCO 6004 Semisubmersible - DP Amethyst 2 5700 Petrobras Low 300s Brazil Oct. 16 Contract provides for a performance bonus of up to 15%, which is excluded from the referenced dayrate Europe & Mediterranean ENSCO 5006 Semisubmersible - Conv Bingo 8,000 7500 Noble Energy Mid 270s Mediterranean Jun. 11 Middle East & Africa ENSCO DS-1 Drillship - DP Gusto 10,000 10000 Total Mid 190s Angola Dec. 11 Next to Total from Jan. 12 to Dec. 14, Low 350s. Current contract provides for a performance bonus of up to 7%, which is excluded from the referenced dayrate. Next contract provides for a performance bonus of up to 5%, which is excluded from the referenced dayrate ENSCO DS-2 Drillship - DP Gusto 10,000 10000 Total Mid 460s Angola Jul. 13 Contract provides for a performance bonus of up to 5%, which is excluded from the referenced dayrate ENSCO 5001 Semisubmersible - Conv Sonat Offshore/Aker 6500 Noble Energy Low 290s Equatorial Guinea Jun. 11 North & South America (excluding Brazil) - See Page 1 "Important Note Regarding U.S. Gulf of Mexico" Segment / Region / Rig Design (1) Water Depth' (1) Customer/ Status Day Rate $000's US Location Est. Avail / Contract Change Comments Deepwater Asia & Pacific Rim ENSCO 7500 Semisubmersible DP 8000 Shipyard/mob/ sea trials Singapore Oct. 11 Next to Petrobras in Brazil to May 14, low 320s. Mob and upgrade costs to be amortized over contract at approx. $20,000 per day. For details see 2 Feb. 11 press release ENSCO 8504 Semisubmersible DP 8500 Under construction/ contracted Singapore/ Brunei 3Q11 Next to TOTAL in Brunei to Mar. 12, mid 420s. Plus options. Mob and upgrade costs to be amortized over contract at approx. $86,000 per day. For details see 21 April 2011 press release ENSCO DS-6 Drillship, DP3 Samsung 12000 Under construction South Korea 4Q11 ENSCO DS-7 Drillship, DP3 Samsung 12000 Under construction South Korea 2H13 ENSCO 8505 Semisubmersible DP 8500 Under construction Singapore 1H12 ENSCO 8506 Semisubmersible DP 8500 Under construction Singapore 2H12 (1) ENSCO 8500 Series® rigs are 6th generation, proprietary design, ultra-deepwater, dynamically positioned semisubmersibles and may be modified to drill in up to 10,000' water depths. Under Construction - uncontracted (2) While ENSCO 8502 and ENSCO 8503 have earned special/sublet day rates since their successful completion of acceptance testing, the original two-year contracts have not yet commenced. Therefore, mobilization from the shipyard and other related reimbursements are not yet being recognized in revenue. Segment / Region / Rig Design Water Depth' Customer/ Status Day Rate $000's US Location Est. Avail / Contract Change Comments Jackups ENSCO 59 F&G 300 Cold stacked Gulf of Mexico ENSCO 68 MLT 84-CE 400 Chevron Mid 90s Gulf of Mexico Dec. 11 Rate increases Jul. 11, low 100s. Plus cost adjustments not included in day rate ENSCO 69 MLT 84-Slot 300 Cold stacked Gulf of Mexico ENSCO 75 MLT Super 116-C 400 Apache Low 100s Gulf of Mexico Oct. 11 ENSCO 81 MLT 116-C 350 Walter Low 80s Gulf of Mexico Aug. 11 ENSCO 82 MLT 116-C 300 Chevron Mid 60s Gulf of Mexico Dec. 11 Rate increases Jul. 11, high 70s. Plus cost adjustments not included in day rate ENSCO 86 MLT 82 SD-C 250 Apache Low 60s Gulf of Mexico Sep. 11 ENSCO 87 MLT 116-C 350 Apache Low 80s Gulf of Mexico Oct. 11 ENSCO 90 MLT 82 SD-C 250 ADTI/Northstar Mid 50s Gulf of Mexico May 11 Next to Arena to Sep. 11, high 50s ENSCO 99 MLT 82 SD-C 250 ExxonMobil Mid 50s Gulf of Mexico May 11 Pride Wisconsin MLT-Slot 300 Cold stacked Gulf of Mexico ENSCO 83 MLT 82 SD-C 250 Pemex Low 110s Mexico Nov. 12 Plus cost adjustments ENSCO 89 MLT 82 SD-C 250 Pemex Mid 70s Mexico Mar. 12 Rates adjust to global index rate every 3 months (next Aug. 11) ENSCO 93 MLT 82 SD-C 250 Pemex Mid 90s Mexico Mar. 12 Rates adjust to global index rate every 3 months (next Jul. 11) ENSCO 98 MLT 82 SD-C 250 Pemex Low 110s Mexico Apr. 12 Plus cost adjustments ENSCO 70 Hitachi K1032N 250 PA Resources High 80s Denmark Apr. 11 Next to Tullow to Nov. 11, low 90s. Then to RWE Dea to Oct. 12, high 80s ENSCO 71 Hitachi K1032N 225 Maersk High 80s Denmark Mar. 12 Plus three 1-year options ENSCO 72 Hitachi K1025N 225 Shipyard UK Jun. 11 Next to Maersk to Jun. 12, high 80s. Plus three 1-year options ENSCO 80 MLT 116-CE 225 Tullow High 80s UK Aug.11 Next to Wintershall to Jan. 12, low 90s. Then expect to work for 60-100 days, low 100s. Then expect to work 90 days, mid 90s, plus 1-well option. ConocoPhillips contract to Jul. 12 suspended, rates to be mutually agreed annually ENSCO 92 MLT 116-C 225 Shipyard UK May 11 Next to ConocoPhillips to Jun. 11, mid 90s. Then to E.ON to Aug. 11, low 100s. Then to RWE Dea Oct. 11 to Jul. 12, high 80s. Plus one 3-well option ENSCO 100 MLT 150-88-C 350 E.ON Mid 130s UK Mar. 12 Plus one 3-well option at market rate ENSCO 101 KFELS MOD V-A 400 Maersk Low 170s UK Jan. 12 One unpriced option plus cost adjustments ENSCO 102 KFELS MOD V-A 400 ConocoPhillips Mid 190s UK Jun. 16 Plus cost adjustments and options. Rate increases to low 200s beginning Jun. 11 for 8 wells (Jun. 14), then mutually agreed. Plus cost adjustments and unpriced options ENSCO 85 MLT 116-C 300 PA Resources Mid 90s Tunisia Jul. 11 Plus one well option ENSCO 105 KFELS MOD V-B 400 En route to Asia U.S. Gulf of Mexico - See Page 1 "Important Note Regarding U.S. Gulf of Mexico" North & South America (excluding Brazil) Mexico Europe & Mediterranean North Sea Mediterranean Segment / Region / Rig Design Water Depth' Customer/ Status Day Rate $000's US Location Est. Avail / Contract Change Comments Jackups ENSCO 54 F&G L-780 Mod II-C 300 ADOC/Bunduq High 50s UAE Sep. 11 Plus cost adjustments and well-to-well option at mutually agreed rate ENSCO 58 F&G 250 Saudi Aramco Mid 60s Saudi Arabia Nov. 13 ENSCO 76 MLT Super 116-C 350 Saudi Aramco Low 100s Saudi Arabia Jun. 11 Next expect to work to Jun. 14, low 100s. Plus one year option ENSCO 84 MLT 82 SD-C 250 Contracted/shipyard Bahrain Oct. 11 Next to Saudi Aramco to Oct. 14, low 60s. Plus one year option ENSCO 88 MLT 82 SD-C 250 Ras Gas Mid 60s Qatar Mar. 12 Plus options ENSCO 91 Hitachi 270 Saudi Aramco Low 130s Saudi Arabia Jun. 11 ENSCO 94 Hitachi 250-C 250 Ras Gas Mid 60s Qatar Dec. 11 Plus options ENSCO 95 Hitachi 250-C 250 Cold stacked Bahrain ENSCO 96 Hitachi 250-C 250 Contracted/shipyard Bahrain Sep. 11 Next to Saudi Aramco to Sep. 14, low 60s. Plus one year option ENSCO 97 MLT 82 SD-C 250 Contracted/shipyard Bahrain Sep. 11 Next to Saudi Aramco to Sep. 14, low 60s. Plus one year option Pride Hawaii Levingston 300 Cold stacked Bahrain Pride Pennsylvania MLT 300 Cold stacked Bahrain ENSCO 61 Levingston 300 Perenco High 80s Cameroon Nov. 11 ENSCO 52 F&G L-780 Mod II-C 300 Petronas Carigali Mid 70s Malaysia Mar. 13 Plus cost adjustments and one year option ENSCO 53 F&G L-780 Mod II-C 300 Talisman High 70s Malaysia Jun. 11 ENSCO 56 F&G L-780 Mod II-C 300 Pertamina Low 80s Indonesia Jul. 11 Expect to work to Apr. 13, mid 70s. Plus mutually agreed rate 6-month option ENSCO 67 MLT 84-CE 400 Pertamina Low 100s Indonesia Jan. 13 Plus 8 month option ENSCO 104 KFELS MOD V-B 400 ConocoPhillips Mid 120s Indonesia May 11 Next to shipyard for repair and inspection, zero rate. Then to Apache Aug. 11 to Aug. 12 in Australia, mid 140s. Plus one year option ENSCO 106 KFELS MOD V-B 400 Newfield Low 120s Malaysia Mar. 12 Plus same rate 7-month option ENSCO 107 KFELS MOD V-B 400 Premier Oil Low 110s Vietnam Jan. 12 Plus five 1-well options at index rate ENSCO 108 KFELS MOD V-B 400 Total High 120s Brunei Nov. 11 ENSCO 109 KFELS MOD V- Super B 350 Apache Low 140s Australia Sep. 11 Rate increases late Jul. to mid 140s. Next to shipyard approx. 10 days, zero rate. Then to PTTEP to Mar. 12, mid 160s TBD 1 KFELS Super A 400 Under construction Singapore 2Q13 TBD 2 KFELS Super A 400 Under construction Singapore 4Q13 Southeast Asia / Australia Under Construction - uncontracted Middle East & Africa Asia & Pacific Rim Middle East Africa Segment / Region / Rig Design Water Depth' Customer/ Status Day Rate $000's US Location Est. Avail / Contract Change Comments Midwater ENSCO 5000 Semisubmersible - Conv Neptune Pentagon 2650 Petrobras Low 230s Brazil Jul. 13 Contract provides for a performance bonus of up to 15%, which is excluded from the referenced day rate ENSCO 5002 Semisubmersible - Conv Aker H-3 1000 OGX Mid 300s Brazil Nov. 11 While the ENSCO 5004 and ENSCO 5002 are working concurrently, their rates will be adjusted to Mid 260s each ENSCO 5004 Semisubmersible - Conv F & G Enhanced Pacesetter 1500 OGX Mid 190s Brazil Sep. 11 While the ENSCO 5004 and ENSCO 5002 are working concurrently, their rates will be adjusted to Mid 260s each ENSCO 5005 Semisubmersible - Conv F & G Enhanced Pacesetter 1500 Petrobras Mid 220s Brazil Apr. 13 Contract provides for a performance bonus of up to 10%, which is excluded from the referenced day rate ENSCO 6000 Semisubmersible - DP Amethyst 4000 Petrobras High 130s Brazil Feb. 12 Currently outfitted for workover activity. Contract provides for a performance bonus of up to 18%, which is excluded from the referenced day rate ENSCO 5003 Semisubmersible - Conv Aker H-3 1000 Shipyard South Africa Sep. 11 Next to SOCO to Dec. 11, mid 180s. Plus one optional well Other Kizomba Deepwater TLP Drilling Rig 5000 ExxonMobil Mid 70s Angola Apr. 15 Management fee paid daily Thunder Horse Deepwater Semisubmersible 6000 BP Mid 80s Gulf of Mexico Jan. 12 Rate adjustment effective 1 Jan 2011. Management fee paid daily ENSCO I Barge Rig Cold stacked Singapore Legend of Ensco rig names to prior Pride International rig names ENSCO DS-1 Pride Africa ENSCO 5001 Pride South Pacific ENSCO DS-2 Pride Angola ENSCO 5002 Pride Sea Explorer ENSCO DS-3 Deep Ocean Ascension ENSCO 5003 Pride South Seas ENSCO DS-4 Deep Ocean Clarion ENSCO 5004 Pride Venezuela ENSCO DS-5 Deep Ocean Mendocino ENSCO 5005 Pride South Atlantic ENSCO DS-6 Deep Ocean Molokai ENSCO 5006 Pride North America ENSCO DS-7 Deep Ocean Marquesas ENSCO 58 Pride North Dakota ENSCO 6000 Pride South America ENSCO 59 Pride Tennessee ENSCO 6001 Pride Carlos Walter ENSCO 61 Pride Cabinda ENSCO 6002 Pride Brazil ENSCO 91 Pride Montana ENSCO 6003 Pride Rio de Janeiro Pride Hawaii Pride Hawaii ENSCO 6004 Pride Portland Pride Pennsylvania Pride Pennsylvania ENSCO 5000 Pride Mexico Pride Wisconsin Pride Wisconsin Note: The day rates reflected in this Fleet Status Report are the operating day rates charged to customers, which may include estimated contractual adjustments for changes in operating costs and/or reimbursable cost adjustments for ongoing expenses such as crew, catering, insurance and taxes. The day rates, however, do not include certain types of non-recurring revenues such as lump sum mobilization payments, revenues earned during mobilizations, revenues associated with contract preparation and other non-recurring reimbursable items such as mobilizations and capital enhancements. Routine and non-routine downtime may reduce the actual revenues recognized during the contract term. Additionally, the Company occasionally negotiates special rates with customers as noted in the comments that reduce revenues recognized during the contract term. For the former Pride International rigs: 1) water depth reflects the maximum capability of the rig based on hull design although the rig may not be equipped to reach the indicated water depth, as noted on the rig fleet section of the Company's website, under Rig Fleet for a listing of current capabilities, 2) certain information in the table, including expected contract expiration dates, are estimates based on current arrangements with customers and current expectations as to the time required for completion of projects, 3) priced options are agreements to allow the client to extend the contract beyond the stated expiration date at the listed day rate (unless otherwise stated), 4) day rates reflect the average revenue per day excluding deferred mobilization amortization, potential performance bonus, reimbursable items, demobilization fees and other items that constitute revenues under generally accepted accounting principle, but are not practicable to determine with specificity on a prospective basis as further described in the Company's SEC filings. Brazil Middle East & Africa Deepwater Drilling Management Barge Rig The Industry Leader in Customer Satisfaction Rated #1 Total Satisfaction Job Quality Performance & Reliability Deepwater Drilling Technology Special Drilling Applications Rated #1 International North Sea Asia & Pacific Rim Latin America & Mexico Non - Vertical Wells Shelf Wells Independent Operators