ENSCO 8505 Ultra-Deepwater Semisubmersible Contracted with Anadarko, Apache and Noble Energy

10/17/2011

One New Deepwater Customer and Two Repeat Customers for ENSCO 8500 Series® Rig

LONDON--(BUSINESS WIRE)-- Ensco plc (NYSE: ESV) announced today that it has entered into a shared drilling contract for ENSCO 8505 with Anadarko Petroleum Corporation, Apache Deepwater LLC and Noble Energy Inc. The initial contract term is for two years or two rotations per operator, whichever is longer, in the U.S. Gulf of Mexico at a day rate of $475,000, plus cost adjustments. The contract adds approximately $350 million to revenue backlog. Two one-year options are at mutually agreed rates.

Delivery of ENSCO 8505 from the Keppel FELS Limited shipyard in Singapore is scheduled for first quarter 2012 followed by contract commencement in second quarter 2012 once mobilization, sea trials and acceptance testing have been completed.

Chairman, President and Chief Executive Officer Dan Rabun commented, "We are very pleased that Anadarko and Noble have chosen to contract a second ENSCO 8500 Series® rig for their drilling programs. Apache has been a long-term customer of our jackup fleet and we welcome the opportunity to expand our relationship with them in the ultra-deepwater market.

“Our employees who have served these customers in the past are to be commended for delivering exceptional safety and operating performance – giving us the opportunity to earn a new, multi-year contract.”

ENSCO 8505 is the sixth of seven rigs in the ENSCO 8500 Series®. In second quarter 2011, these rigs that operate in South America, Asia and the U.S. Gulf of Mexico had virtually no downtime and achieved 99% utilization. Ensco is ranked #1 in overall customer satisfaction and #1 in deepwater drilling by EnergyPoint, an independent survey firm.

The proprietary design of the ENSCO 8500 Series® rigs was developed with extensive input from customers to address the drilling requirements for virtually every deepwater field around the world. The design includes a 35,000’ nominal rated drilling depth, two million pounds of hoisting capacity, 8,000 tons of variable deck load and an open layout well suited for subsea completion activities. Improved visibility from the open deck configuration also enhances safety.

The uniform design of the ENSCO 8500 Series® streamlines construction, operations, inventory management, training, regulatory compliance, repairs and maintenance. It also provides flexibility for customer specific enhancements; in particular, the 8500 Series may be modified to drill and complete wells in water depths up to 10,000’.

ENSCO 8506, the final rig in the ENSCO 8500 Series®, is currently under construction in Singapore with delivery scheduled for the second half of 2012.

Ensco plc (NYSE: ESV) brings energy to the world as a global provider of offshore drilling services to the petroleum industry. We have the world’s second largest offshore drilling fleet comprised of dynamically-positioned drillships and semisubmersibles, moored semisubmersibles and premium jackups. Ensco is ranked #1 for overall customer satisfaction in the leading independent survey conducted by EnergyPoint Research with #1 ratings in 14 of 16 separate categories. To learn more about Ensco, please visit our website at www.enscoplc.com. Ensco plc is an English limited company (England No. 7023598) with its registered office and corporate headquarters located at 6 Chesterfield Gardens, London W1J 5BQ.

Statements contained in this press release 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; and risks inherent to shipyard rig construction, repair, maintenance or enhancement; 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.

Source: Ensco plc