China Oilfield Services Limited is a leading oilfield services provider in offshore China market. Our services cover each phase of offshore oil and gas exploration, development and production. Our four business segments are: drilling services, well services, marine support and transportation services and geophysical services. COSL was listed on the Main Board of the Hong Kong Exchanges and Clearing on November 20, 2002.

Since June 30, 2004, we own 13 drilling rigs, including 10 jack-ups and 3 semi-submersibles, and rent 1 more jack-up. In addition, we own and operate the largest and most diverse fleet of marine support vessels offshore China, with 66 vessels and 5 oil tankers, 6 seismic vessels, 3 geotech survey vessels including large arrays of modern facilities and equipment for logging, drilling fluids, directional drilling, cementing, well completion and well work-over services.

Majority of COSL’s business is conducted offshore China, North and South America, Middle East, offshore Africa and offshore Europe. Wherever we operate, our employees are focused on our mission of providing premier quality services to our customers while adhering to the highest health, safety and environmental standards. We have obtained the ISO9002 and certifications. We are also committed to achieving the ISO14000 environmental management standard as well as the OSHA 18000 occupational health and safety standard. We have a total of over 5,000 employees worldwide. For further details, log on to www.cosl.com.cn