Pacific Drilling Comments on Transocean Patent Infringement Claim

  Pacific Drilling Comments on Transocean Patent Infringement Claim

Business Wire

LUXEMBOURG -- April 17, 2013

Pacific Drilling S.A. (NYSE: PACD) (NOTC: PDSA) announced today that it became
aware that Transocean (NYSE: RIG) has filed a complaint of patent infringement
against Pacific Drilling in the United States District Court for the Southern
District of Texas. The suit concerns dual activity patents of Transocean which
are also subject of pending actions in the US against Maersk Drilling and
Stena Drilling. The foreign counterparts to these patents have been
invalidated in other various jurisdictions around the world, including Norway
and Korea. The US appellate process with regard to the action against Maersk
has not been exhausted, and the action against Stena has yet to go to trial.

“We have not conducted dual activity operations in the US Gulf of Mexico, as
the challenges to the validity of the patents have not yet been finally
adjudicated,” commented CEO, Chris Beckett. “We are aware that Transocean has
filed a lawsuit but we have not been served. We think this action is an
attempt to pressure us into taking a license before the validity of the
patents is finally adjudicated. We do not anticipate this claim will have an
impact on our operations outside the US Gulf of Mexico.”

Dual activity drilling is not to be confused with dual gradient drilling which
is a Chevron (NYSE: CVX) technology.

Pacific Drilling retained the Houston office of Winston & Strawn LLP to defend
it against the claim.

Statements that are not historical facts in this press release are
forward-looking statements and are subject to certain risks, uncertainties and
assumptions and consequently actual results may differ materially from those
indicated or implied by such forward-looking statements. Forward-looking
statements speak only as of the date they are made, and we undertake no
obligation to publicly update or revise any of them in light of new
information, future events or otherwise.


Pacific Drilling Services, Inc.
William Restrepo, +1 832-255-0486
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