Exhibit 99.1

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth'(1) |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(2) |  | Comments
Floaters |  |  |  |  |  |  |  |  |  |  |  |  |  |
North & South America (excluding Brazil) |  |
ENSCO DS-3 |  | Drillship, DP3 Samsung |  | 10000/12000 |  | BP |  | Low 500s |  | U.S. Gulf of Mexico |  | Jun. 16 |  | -----. Plus cost adjustments
ENSCO DS-4 |  | Drillship, DP3 Samsung |  | 10000/12000 |  | BP |  | Mid 560s |  | U.S. Gulf of Mexico |  | Jul. 16 |  | Plus cost adjustments
ENSCO DS-5 |  | Drillship, DP3 Samsung |  | 10000/12000 |  | Petrobras/Repsol |  | High 430s |  | U.S. Gulf of Mexico |  | Jul. 16 |  | -----. Assigned to Repsol for 1 well. Eligible for bonus opportunity up to 17%, plus cost adjustments
ENSCO 8500 |  | Semisubmersible DP |  | 8500/10000 |  | Anadarko/Eni |  | High 310s |  | U.S. Gulf of Mexico |  | Sep. 15 |  | Planned inspection for ----- approx. 35 days in 2Q14. Plus cost adjustments and two 1-year same-rate options
ENSCO 8501 |  | Semisubmersible DP |  | 8500/10000 |  | Noble Energy |  | Mid 530s |  | U.S. Gulf of Mexico |  | Aug. 14 |  | Planned inspection for approx. 14 days in 3Q14. Plus cost adjustments
ENSCO 8502 |  | Semisubmersible DP |  | 8500/10000 |  | Stone |  | Low 530s |  | U.S. Gulf of Mexico |  | Nov. 14 |  | Next to Talos in direct continuation for 3 wells (est. Jun. 14 to Nov. 14), low 530s. Plus one 1-well unpriced option
ENSCO 8503 |  | Semisubmersible DP |  | 8500/10000 |  | Marathon |  | Mid 490s |  | U.S. Gulf of Mexico |  | Jun. 14 |  | Zero rate for ----- approx. 8 days in 2Q14
ENSCO 8505 |  | Semisubmersible DP |  | 8500/10000 |  | Anadarko/Apache/ Noble Energy |  | Mid 490s |  | U.S. Gulf of Mexico |  | 2Q15 |  | Plus cost adjustments. Estimate current customers' drilling programs end in 4Q14. Next to Deep Gulf Energy for 1 well (est. 4Q14 to 2Q15), mid 370s
ENSCO 8506 |  | Semisubmersible DP |  | 8500/10000 |  | Anadarko |  | High 540s |  | U.S. Gulf of Mexico |  | Jul. 15 |  | Plus cost adjustments

Page 1 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth'(1) |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(2) |  | Comments
Floaters |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brazil |  |
ENSCO 7500 |  | Semisubmersible DP |  | 8000 |  | Petrobras |  |  |  | Brazil |  | Aug. 14 |  | Based upon mutual agreement with the customer, zero rate beginning in Jan. 14 for the remainder of the contract term. We are exploring other opportunities with the customer
ENSCO 6001 |  | Semisubmersible - DP Megathyst |  | 5700 |  | Petrobras |  | Mid 370s |  | Brazil |  | Jun. 18 |  | Mid 250s day rate during planned shipyard upgrade for approx. 65 days in 3Q14. Plus approx. $16,000 per day amortized Oct. 14 to Jun. 18 for capital upgrades. Plus cost adjustments
ENSCO 6002 |  | Semisubmersible - DP Megathyst |  | 5700 |  | Petrobras |  | Mid 370s |  | Brazil |  | Ju1. 18 |  | Zero rate for approx. 15 days in 2Q14. Low 170s day rate during planned shipyard upgrade for approx. 65 days in 4Q14. Plus approx. $21,000 per day amortized Dec. 14 to Jul. 18 for capital upgrades. Plus cost adjustments
ENSCO 6003 |  | Semisubmersible - DP Megathyst |  | 5700 |  | Petrobras |  | Low 320s |  | Brazil |  | Jan. 17 |  | -----. Eligible for bonus opportunity up to 15%, plus cost adjustments
ENSCO 6004 |  | Semisubmersible - DP Megathyst |  | 5700 |  | Petrobras |  | Low 320s |  | Brazil |  | Oct. 16 |  | -----. Eligible for bonus opportunity up to 15%, plus cost adjustments
ENSCO 6000 |  | Semisubmersible - DP Amethyst |  | 3400/4000 |  | Preparing to Mobilize |  |  |  | Brazil |  |  |  | Next mobilize to shipyard in Spain

Page 2 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth'(1) |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(2) |  | Comments
Floaters |  |  |  |  |  |  |  |  |  |  |  |  |  |
Europe & Mediterranean |  |
ENSCO 5004 |  | Semisubmersible - Conv F & G Enhanced Pacesetter |  | 1500 |  | Shipyard/ Contract Preparations |  |  |  | Malta |  | Dec. 16 |  | Next to Mellitah from Jul. 14 to Dec. 16, initial rate low 300s at commencement. Plus periodic rate increases resulting in mid 310s average rate over contract. Plus approx. $17,000 per day for mobilization amortized over primary contract term
Africa |  |
ENSCO DS-1 |  | Drillship - DP Gusto 10,000 |  | 6000/10000 |  | TOTAL |  | High 350s |  | Angola |  | Jan. 16 |  | -----. Plus cost adjustments and unpriced options. Eligible for bonus opportunity up to 5%
ENSCO DS-2 |  | Drillship - DP Gusto 10,000 |  | 6000/10000 |  | TOTAL |  | High 430s |  | Angola |  | 2Q15 |  | Next mobilize to shipyard in Nov. 14 for survey and capital upgrades to 2Q15
ENSCO DS-6 |  | Drillship, DP3 Samsung |  | 10000/12000 |  | BP |  | High 540s |  | Angola |  | Feb. 18 |  | Plus approx. $102,000 per day amortized Feb.13 to Feb. 18 for special day rate ahead of mobilization, upgrade costs and reimbursable mobilization expenses. Plus cost adjustments and two 1-year options at mutually agreed rates
ENSCO DS-7 |  | Drillship, DP3 Samsung |  | 10000/12000 |  | TOTAL |  | Mid 630s |  | Angola |  | Nov. 16 |  | Plus periodic rate increases resulting in high 640s average rate over three-year contract. Plus approx. $28,000 per day amortized Nov. 13 to Nov. 16 for mobilization
ENSCO 5001 |  | Semisubmersible - Conv Sonat |  | 5000/6500 |  | PetroSA |  | High 280s |  | South Africa |  | Feb. 15 |  | -----. Planned inspection for approx. 30 days in 3Q14. Plus approx. $7,500 per day for reimbursable mobilization expenses amortized Jan. 13 to Feb. 15. Plus two 1-well options, low 320s
ENSCO 5000 |  | Semisubmersible - Conv Neptune Pentagon |  | 2300/2650 |  | Warm Stacked |  |  |  | South Africa |  |  |  |

Page 3 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth'(1) |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(2) |  | Comments
Floaters |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asia & Pacific Rim |  |
ENSCO 8504 |  | Semisubmersible DP |  | 8500/10000 |  | Shell |  | Low 560s |  | Malaysia |  | May 15 |  | -----. Plus cost adjustments and two 6-month same-rate options. Plus approx. $8,000 per day for mobilization amortized Jul.13 to May 15
ENSCO 5006 |  | Semisubmersible - Conv Bingo 8,000 |  | 6200/7500 |  | Inpex/ Shipyard |  |  |  | Singapore |  | Mar. 18 |  | Shipyard upgrades under contract for 40 month drilling program in Australia with estimated commencement 4Q14, initially low 460s. Plus periodic rate increases resulting in mid 490s average rate over drilling program. Plus estimate of approx. $210,000 per day amortized over the duration of the drilling program for capital upgrades and day rates during shipyard stay and mobilizations
ENSCO 5005 |  | Semisubmersible - Conv F & G Enhanced Pacesetter |  | 1500 |  | Shipyard/ Contracted |  |  |  | Singapore |  | Jun. 15 |  | Inspection and shipyard upgrades. Then to PTTEP in Myanmar for 10 wells (est. Jul. 14 to Jun. 15), low 230s. Plus two 1-well options
ENSCO 5002 |  | Semisubmersible - Conv Aker H-3 |  | 1000 |  | Warm Stacked |  |  |  | Singapore |  |  |  |
Under Construction |  |
ENSCO DS-8 |  | Drillship, DP3 Samsung GF12000 |  | 10000/12000 |  | Under construction |  |  |  | South Korea |  | Early 1Q15 |  |
ENSCO DS-9 |  | Drillship, DP3 Samsung GF12000 |  | 10000/12000 |  | Under construction/ Contracted |  |  |  | South Korea |  | 3Q18 |  | Contracted to ConocoPhillips in U.S. Gulf of Mexico from 3Q15 to 3Q18, low 550s. Plus mob fee of approx. $32 million to be amortized over primary contract term. Plus cost adjustments and two 1-year unpriced options
ENSCO DS-10 |  | Drillship, DP3 Samsung GF12000 |  | 10000/12000 |  | Under construction |  |  |  | South Korea |  | 3Q15 |  |

(1) For rigs that may be modified to drill in deeper water depths, both the currently outfitted and maximum upgrade capabilities are shown.
(2) Estimated available date for rig after current and follow-on contracts (excluding option period) and shipyard stays have been completed. For newbuild rigs without a contract, the estimated available date is the
expected delivery date from the shipyard.
Page 4 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth' |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(1) |  | Comments
Jackups |  |  |  |  |  |  |  |  |  |  |  |  |  |
North & South America (excluding Brazil) |  |
U.S. Gulf of Mexico |  |
ENSCO 68 |  | MLT 84-CE |  | 400 |  | Chevron |  | Mid 140s |  | Gulf of Mexico |  | Jan. 15 |  | Planned inspection for approx. 15 days in 3Q14. Day rate does not include certain extra reimbursable costs
ENSCO 75 |  | MLT Super 116-C |  | 400 |  | Talos |  | Mid 150s |  | Gulf of Mexico |  | Jun. 14 |  | -----. Plus cost adjustments
ENSCO 81 |  | MLT 116-C |  | 350 |  | Chevron |  | Mid 140s |  | Gulf of Mexico |  | Jan. 15 |  | Planned inspection for approx. 14 days in 3Q14
ENSCO 82 |  | MLT 116-C |  | 300 |  | Energy XXI |  | Low 140s |  | Gulf of Mexico |  | Sep. 14 |  | -----. Plus cost adjustments
ENSCO 86 |  | MLT 82 SD-C |  | 250 |  | ExxonMobil |  | Mid 120s |  | Gulf of Mexico |  | Jul. 14 |  | -----
ENSCO 87 |  | MLT 116-C |  | 350 |  | Fieldwood |  | High 140s |  | Gulf of Mexico |  | Jan. 15 |  | Planned inspection for approx. 10 days in 2Q14
ENSCO 90 |  | MLT 82 SD-C |  | 250 |  | Talos |  | High 120s |  | Gulf of Mexico |  | Jun. 14 |  |
ENSCO 99 |  | MLT 82 SD-C |  | 250 |  | Energy XXI |  | Mid 120s |  | Gulf of Mexico |  | Jul. 14 |  | Planned maintenance for approx. 14 days in 3Q14
Mexico |  |
ENSCO 83 |  | MLT 82 SD-C |  | 250 |  | Pemex |  | Low 90s |  | Mexico |  | Oct. 16 |  | Zero rate for approx. 11 days in 2Q14
ENSCO 89 |  | MLT 82 SD-C |  | 250 |  | Pemex |  | Low 90s |  | Mexico |  | Nov. 15 |  | -----
ENSCO 93 |  | MLT 82 SD-C |  | 250 |  | Pemex |  | Low 90s |  | Mexico |  | Jun. 15 |  |
ENSCO 98 |  | MLT 82 SD-C |  | 250 |  | Pemex |  | Low 90s |  | Mexico |  | Aug. 15 |  | Planned inspection for approx. 10 days in 3Q14

Page 5 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth' |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(1) |  | Comments
Jackups |  |  |  |  |  |  |  |  |  |  |  |  |  |
Europe |  |
ENSCO 70 |  | Hitachi K1032N |  | 250 |  | -----RWE Dea |  | Mid 140s |  | UK |  | Dec. 16 |  | Shipyard upgrade and inspection for ----- approx. 38 days in 2Q14. -----. Rate increases Jun. 14 to low 170s, then mid 140s mid Sep. 14 to mid Nov. 14. Planned shipyard upgrade for approx. 30 days in 4Q14. Then to Maersk in Denmark to Dec. 16, low 160s. Plus approx. $18,000 per day for capital upgrades amortized Dec. 14 to Dec. 16. Plus cost adjustments and three 1-year unpriced options
ENSCO 71 |  | Hitachi K1032N |  | 225 |  | Maersk |  | Low 170s |  | Denmark |  | May 15 |  | -----. Plus one 1-year priced option and one 1-year option at mutually agreed rate
ENSCO 72 |  | Hitachi K1025N |  | 225 |  | Maersk |  | Low 140s |  | Denmark |  | Sep. 14 |  | Planned inspection for approx. 20 days in 2Q14. Plus two 1-year options at escalating day rates and one 1-year option at mutually agreed rate
ENSCO 80 |  | MLT 116-CE |  | 225 |  | -----GDF |  | Low 140s |  | -----Netherlands |  | Apr. 17 |  | Inspection for ----- approx. 20 days in 2Q14. -----. Plus cost adjustments and unpriced option
ENSCO 92 |  | MLT 116-C |  | 225 |  | -----Shipyard |  | ----- |  | -----UK |  | Aug. 15 |  | Planned inspection for approx. 38 days in 2Q14. Then to ConocoPhillips in UK Jun. 14 to Aug. 15, low 160s. Both with cost adjustments
ENSCO 100 |  | MLT 150-88-C |  | 350 |  | Ithaca |  | Mid 160s |  | UK |  | 3Q18 |  | Plus cost adjustments and two 1-well options. Then to Premier in UK in direct continuation 3Q15 to 3Q18, mid 180s
ENSCO 101 |  | KFELS MOD V-A |  | 400 |  | BP |  | High 210s |  | UK |  | Dec. 15 |  | Plus cost adjustments and two 6-month unpriced options
ENSCO 102 |  | KFELS MOD V-A |  | 400 |  | ConocoPhillips |  | Low 210s |  | UK |  | Jun. 16 |  | Planned maintenance for approx. 10 days in 2Q14. Rate firm for 8 wells (est. through Apr. 15) thereafter at mutually agreed rate. Plus cost adjustments and unpriced options
ENSCO 120 |  | ENSCO 120 Series |  | 400 |  | Nexen |  | Mid 230s |  | UK |  | Nov. 15 |  | -----. Plus approx. $13,000 per day for mobilization amortized Mar. 14 to Nov. 15. Plus cost adjustments and eleven 1-well options
ENSCO 121 |  | ENSCO 120 Series |  | 400 |  | Acceptance Testing |  |  |  | Netherlands |  | May 16 |  | Contracted to Wintershall from late May 14 to late May 16, low 230s. Plus mob fee of approx. $8 million to be amortized over primary contract term. Plus one 1-year unpriced option

Page 6 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth' |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(1) |  | Comments
Jackups |  |  |  |  |  |  |  |  |  |  |  |  |  |
Middle East |  |
ENSCO 53 |  | F&G L-780 Mod II-C |  | 300 |  | NDC |  | Low 100s |  | UAE |  | Feb. 16 |  | Plus two 1-year unpriced options
ENSCO 54 |  | F&G L-780 Mod II-C |  | 300 |  | -----Shipyard |  | ----- |  | -----UAE |  | Sep. 17 |  | In shipyard for capital upgrades. Then to Saudi Aramco Sep. 14 to Sep. 17, mid 110s. Plus approx. $39,000 per day for upgrade costs and mobilization amortized Sep. 14 to Sep. 17. Plus one 1-year priced option
ENSCO 58 |  | F&G L-780 Mod II |  | 250 |  | Saudi Aramco |  | Mid 60s |  | Saudi Arabia |  | Jan. 15 |  |
ENSCO 76 |  | MLT Super 116-C |  | 350 |  | Saudi Aramco |  | Low 100s |  | Saudi Arabia |  | Jul. 14 |  | Planned inspection for approx. 21 days in 2Q/3Q14. Plus one 1-year option, high 150s
ENSCO 84 |  | MLT 82 SD-C |  | 250 |  | Saudi Aramco |  | Low 60s |  | Saudi Arabia |  | Mar. 16 |  | -----. Rate increases Mar. 15 to mid 70s
ENSCO 88 |  | MLT 82 SD-C |  | 250 |  | Saudi Aramco |  | Low 100s |  | Saudi Arabia |  | Nov. 16 |  | Plus one 1-year priced option
ENSCO 91 |  | Hitachi Zosen Drill Hope C-150 |  | 270 |  | Saudi Aramco |  | High 60s |  | Saudi Arabia |  | Aug. 14 |  | Planned inspection for approx. 21 days in 4Q14. Plus one 1-year option, mid 90s
ENSCO 94 |  | Hitachi 250-C |  | 250 |  | Saudi Aramco |  | Low 100s |  | Saudi Arabia |  | Jun. 16 |  | Planned inspection for approx. 14 days in 3Q14. Plus one 1-year priced option
ENSCO 96 |  | Hitachi 250-C |  | 250 |  | Saudi Aramco |  | Low 60s |  | Saudi Arabia |  | Feb. 16 |  | Shipyard upgrade for ----- approx. 45 days in 2Q14. -----. Rate increases Feb. 15 to mid 70s
ENSCO 97 |  | MLT 82 SD-C |  | 250 |  | Saudi Aramco |  | Low 60s |  | Saudi Arabia |  | Feb. 16 |  | Shipyard upgrade for ----- approx. 55 days in 2Q14. -----. Rate increases Feb. 15 to mid 70s

Page 7 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth' |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(1) |  | Comments
Jackups |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asia & Pacific Rim |  |
ENSCO 52 |  | F&G L-780 Mod II-C |  | 300 |  | Murphy |  | Mid 80s |  | Malaysia |  | Sep. 14 |  | Plus cost adjustments and one 1-year unpriced option
ENSCO 56 |  | F&G L-780 Mod II-C |  | 300 |  | Pertamina |  | Mid 110s |  | Indonesia |  | Jul. 15 |  | Plus approx. $3,000 per day for mobilization amortized Jul. 13 to Jul. 15. Plus one 8-month unpriced option
ENSCO 67 |  | MLT 84-CE |  | 400 |  | Pertamina |  | Mid 130s |  | Indonesia |  | Mar. 16 |  | Plus one 8-month unpriced option
ENSCO 104 |  | KFELS MOD V-B |  | 400 |  | Santos |  | Low 170s |  | Vietnam |  | May 14 |  |
ENSCO 105 |  | KFELS MOD V-B |  | 400 |  | Shell |  | Low 160s |  | Malaysia |  | Dec. 14 |  | Plus approx. $3,000 per day for mobilization amortized Nov. 13 to Nov. 14. Plus cost adjustments and one 6-month priced option and one 1-year priced option
ENSCO 106 |  | KFELS MOD V-B |  | 400 |  | -----SapuraKencana |  | High 150s |  | Malaysia |  | Nov. 14 |  | Plus cost adjustments. Plus two 6-month unpriced options. Next planned inspection and upgrade for approx. 50 days in 4Q14
ENSCO 107 |  | KFELS MOD V-B |  | 400 |  | OMV |  | Mid 230s |  | New Zealand |  | Feb. 15 |  | -----. Plus approx. $59,000 per day for contract preparations and mobilization to be amortized Mar. 14 to Feb. 15. Plus cost adjustments and one 90-day unpriced option
ENSCO 108 |  | KFELS MOD V-B |  | 400 |  | PTTEP |  | High 150s |  | Thailand |  | Apr. 17 |  | Planned inspection and upgrades for approx. 10 days in 2Q14. Plus cost adjustments
ENSCO 109 |  | KFELS MOD V-Super B |  | 350 |  | -----Hoang Long |  | Low 170s |  | Vietnam |  | Sep. 14 |  | -----. Plus one 90-day priced option

Page 8 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth' |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(1) |  | Comments
Jackups |  |  |  |  |  |  |  |  |  |  |  |  |  |
Under Construction |  |
ENSCO 140 |  | ENSCO 140 Series |  | 340/400 |  | Under construction |  |  |  | UAE |  | Mid 2016 |  |
ENSCO 141 |  | ENSCO 140 Series |  | 340/400 |  | Under construction |  |  |  | UAE |  | Mid 2016 |  |
ENSCO 122 |  | ENSCO 120 Series |  | 400 |  | Under construction/Contracted |  |  |  | Singapore |  | 4Q16 |  | Contracted to NAM in Dutch and UK sector from 4Q14 to 4Q16, low 230s. Plus mob fee of approx. $10 million to be amortized over primary contract term. Plus cost adjustments and two 1-year unpriced options
ENSCO 123 |  | ENSCO 120 Series |  | 400 |  | Under construction |  |  |  | Singapore |  | 2Q16 |  |
ENSCO 110 |  | KFELS MOD V-B |  | 400 |  | Under construction |  |  |  | Singapore |  | 1Q15 |  |

(1) Estimated available date for rig after current and follow-on contracts (excluding option period) and shipyard stays have been completed. For newbuild rigs without a contract, the estimated available date is the
expected delivery date from the shipyard.
Page 9 of 10

|  |  | Ensco plc Fleet Status Report 15 May 2014 |  |  |

Monthly Changes: bolded rig names and underlined text signify changes in rig status from previous report.

Segment / Region / Rig |  | Design |  | Water Depth' |  | Customer/ Status |  | Day Rate $000′s US |  | Location |  | Est. Avail(1) |  | Comments
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater Drilling Management |  |
Thunder Horse |  | Deepwater Semisubmersible |  | 6000 |  | BP |  | Low 100s |  | U.S. Gulf of Mexico |  | Jan. 15 |  | Plus two 1-year priced options, plus cost adjustments
Mad Dog |  | Deepwater Spar Drilling Rig |  | 4500 |  | BP |  | High 60s |  | U.S. Gulf of Mexico |  | Jan. 15 |  | Plus one 1-year priced option, plus cost adjustments

(1) Estimated available date for rig after current and follow-on contracts (excluding option period) and shipyard stays have been completed. For newbuild rigs without a contract, the estimated available date is the
expected delivery date from the shipyard.
Definitions and Disclaimers
Day Rate Definition. 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, and the impact of the fair market value adjustments to previously acquired drilling contracts. 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. Significant zero rate estimates are reflected in the comments section.
Forward Looking Statement. Statements contained in this Fleet Status Report 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 involving future rig day rates; cost adjustments; utilization; estimated rig availability; contract duration, status, terms and other contract commitments; customers; rig enhancement projects; new rig commitments; the expected 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. 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 operations; changes in worldwide rig supply and demand, competition and technology; future levels of offshore drilling activity; 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; actual contract commencement dates; environmental or other liabilities, risks or losses; our ability to attract and retain skilled personnel on commercially reasonable terms; governmental action, civil unrest and political and economic uncertainties; terrorism, piracy and military action; and the outcome of litigation, legal proceedings, investigations or other claims or contract disputes. 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.
Page 10 of 10