China Oilfield Services Ltd operates in the Drilling oil and gas wells sector. China Oilfield Services Limited (COSL) is a solution provider of integrated oilfield services in China. The Company's services cover each phase of oil and gas exploration, development and production. The Company provides drilling services, including rig, module rig and rig management services; oilfield technology services, including logging, drilling fluids, directional drilling, cementing and liftboat services; marine support and transportation services, including transportation services of materials, supplies and personnel, as well as geophysical services, including the services of seismic and construction survey. As of December 31, 2010, the Company operated and managed 29 drilling rigs (of which 25 are jack-up rigs and four are semi-submersibles), two platform supply vessels, four module rigs and six onshore rigs. The Company also possesses and manages 75 supply vessels, three oil tankers, five chemical carriers, eight seismic vessels and four surveying vessels. In our complete report available for purchase the company is compared to: Shanxi Xishan Coal & Electricity Power, Ltd., Shanxi Lu'an Environmental Energy Development Company Limited and Inner Mongolia Yitai Coal Company Limited.