Noble Corporation Awarded Contracts for Two Ultra-Deepwater Drillships; Adds in Excess of $1.3 Billion in Potential Revenue

 Noble Corporation Awarded Contracts for Two Ultra-Deepwater Drillships; Adds
            in Excess of $1.3 Billion in Potential Revenue Backlog

PR Newswire

ZUG, Switzerland, April 18, 2013

ZUG,Switzerland, April 18, 2013 /PRNewswire/ --Noble Corporation(NYSE: NE)
today announced that the Company has entered into two (2) three-year term
drilling contracts withPlains Exploration & Production Company (NYSE:PXP) for
theNoble Sam Croft and the Noble Tom Madden,two of Noble's new
ultra-deepwater drillships currently under construction at theHyundai Heavy
Industries Co. Ltd.(HHI) shipyard in Ulsan,South Korea. The drillships,
which are being constructed on a fixed price basis, are expected to be
utilized for operations primarily in the U.S.Gulf ofMexico under these

TheNoble Sam Croft is expected to be delivered in the second quarter of 2014,
followed closely by the Noble Tom Madden, which is expected to be delivered in
second half of 2014. The contracts are expected to commence following
mobilization to the U.S. Gulf of Mexico and customer acceptance. Revenues to
be generated over the three-year terms are expected to total
approximately$693 million per rig, including mobilization fees, representing
in excess of $1.3 billion in total potential backlog. With the award of
contracts for these two units,all four ultra-deepwater drillships under
construction for Noble at HHI are now under contract.

"With the addition of these units to our U.S. Gulf of Mexico fleet, Noble will
have one of the most modern and capable fleets in the region, a fact that
demonstrates the fundamental change going on across the Company," noted David
W. Williams, Chairman, President and Chief Executive Officer. "At the same
time, these contracts provide us with significant additional backlog, while
expanding and diversifying our customer base as we grow our relationship with
an important new customer."

TheNoble Sam Croft and the Noble Tom Madden are two of the  four
ultra-deepwater drillships being constructed for Noble by HHI. All four
drillships are based on a Hyundai Gusto P10000 hull design, capable of
operations in water depths of up to 12,000 feet and offering a variable deck
load of 20,000 metric tons. TheNoble Sam Croft and Noble Tom Maddenwill be
fully equipped to operate in up to 10,000 feet of water while offering DP-3
station keeping, two complete six-ram BOP systems, multiple parallel activity
features that improve overall well construction efficiencies and
accommodations for up to 210 personnel. Both rigs also will also be equipped
with a 165-ton heave compensated construction cranes to facilitate deployment
of subsea production equipment, providing another level of efficiency during
field development programs.

About Noble
Noble is a leading offshore drilling contractor for the oil and gas industry.
Noble performs, through its subsidiaries, contract drilling services with a
fleet of 79 offshore drilling units (including five ultra-deepwater drillships
and six high-specification jackup drilling rigs currently under construction),
located worldwide, including in the U.S. Gulf of Mexico and Alaska, Mexico,
Brazil, the North Sea, the Mediterranean, West Africa, the Middle East, India
and Australia. Noble's shares are traded on the New York Stock Exchange under
the symbol "NE." Additional information on Noble Corporation is available on
the Company's Web site at

Statements regarding contract backlog, costs, revenue, fleet composition,
capabilities or performance, timing of delivery of newbuilds, contract
commitments, dayrates, contract commencements, future performance, as well as
any other statements that are not historical facts in this release, are
forward-looking statements that involve certain risks, uncertainties and
assumptions. These include but are not limited to operating hazards and
delays, risks associated with operations outside of the U.S., actions by
regulatory authorities, customers and other third parties, legislation and
regulations affecting drilling operations, compliance with regulatory
requirements, factors affecting the level of activity in the oil and gas
industry, supply and demand of drilling rigs, factors affecting the duration
of contracts, delays in the construction of newbuilds, factors that reduce
applicable dayrates, hurricanes and other weather conditions, the future price
of oil and gas and other factors detailed in the Company's most recent Form
10-K, Form 10-Q's and other filings with theSecurities and Exchange
Commission. Should one or more of these risks or uncertainties materialize, or
should underlying assumptions prove incorrect, actual results may vary
materially from those indicated.

SOURCE Noble Corporation

Contact: For additional information, contact:For Investors: Jeffrey L.
Chastain, Vice President of Investor Relations and Corporate Communications,
Noble Drilling Services Inc., 281-276-6383, For Media: John S. Breed, Director
of Investor Relations and Corporate Communications, Noble Drilling Services
Inc., 281-276-6729
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