COSL's Bohai 8 Accredited

(26 June 2006 - Beijing) China Oilfield Service Limited ( COSL or the Company ; stock code: 2883.HK) is pleased to announce that its drilling platform, Bohai 8, was accredited The Best Cooperation/ Record of No Accident and Time Delay in Million Hours by the U.S. Headquarter of Kerr McGee Corporation.

Mr. Terence Jupp, Vice President of Kerr McGee of the U.S. Headquarter, Mr. Michael Verm, President of Kerr McGee (China), together with different department heads, arrived at Bohai 8, which is in operation at 12-1E of Cao Fei Dian ( ), Bohai, recently. They awarded the CFD11-1 and 12-1E development projects of Bohai 8 The Best Cooperation/ Record of No Accident and Time Delay in Million Hours accreditation. During the prize presentation ceremony, the management of Kerr McGee highly appraised Bohai 8 in providing safe and quality services in their long-term development cooperation and considered it to be the best partner.

The representative of COSL who attended the ceremony and said, We are delighted and honored to receive the award. This represents the recognition and support of international clients to the service standard of the Company. COSL has always emphasized on production safety and viewed it as the foundation for corporate development. We will continue to strengthen our QHSE management, with an aim of providing our clients with reliable, safe and quality services.