COSL Will Announce 2007 Interim Results

(17 August 2007, Hong Kong) China Oilfield Services Limited ( COSL or the Company ; stock code: 2883) will announce its 2007 interim results on 29 August 2007 (Wednesday). An analyst presentation as well as a press conference will be held in Hong Kong at the same day to announce the Company s performance of the first half 2007 and its future strategies.

Details of the events are as follows:

Analyst Presentation

Date: 29 August 2007 (Wed.)

Time: 10:00 am

Venue: Ballroom C, Level 5,

Island Shangri-la Hong Kong,

Pacific Place, Admiralty, Hong Kong

Press Conference

Date: 29 August 2007 (Wed.)

Time: 11:30 am

Venue: same as above

Formal invitations will be sent out one week before the results announcement date. Presentation materials and press releases will be distributed during the press conference and Analyst presentation, and will be available for download in the Company website www.cosl.com.cn on the same day. Webcast of the analyst presentation could also be downloaded through the website from 30 August 2007 (Thu.) onwards.