China Oilfield Services Limited Annual Results 2009 Press Conference

China Oilfield Services Limited ( COSL or the Company , HKSE stock code: 2883, SSE stock code: 601808) cordially invites you or your representative to a press conference to be held on 31 March 2010 (Wednesday) in respect of the Company s Annual Results 2009.

COSL is the leading integrated oilfield services provider in the offshore China market. Its services cover and put together each phase of offshore oil and gas exploration, development and production. Its four core business segments are geophysical services, drilling services, well services and marine support services.

COSL publicly offered H shares which were listed on the Main Board of the Stock Exchange of Hong Kong Limited since 20 November, 2002 under the ticker 2883. Since 26 March, 2004, COSL's stocks can be traded by means of Level I unlisted American Depositary Receipts at OTC (over-the-counter) market in the United States under the ticker CHOLY.

COSL listed its A shares on Shanghai Stock Exchange under the ticker 601808 since 28 September, 2007.

At the press conference, senior management of COSL will share with you highlights of the Company s Annual Results 2009 as well as its latest business development and future strategies.

For confirmation, please fill in the attached reply slip and fax it to Ivy Wong/ Summer Si of iPR Ogilvy Ltd. at (852) 3170 6606. For immediate enquiries, please call (852) 2136 6185.

Reply Slip
Yes. I will attend the press conference on 31 March, 2010 (Wed)
No. I will not attend the press conference.

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