COSL (China Oilfield Services Limited) is a leading comprehensive solution provider of integrated oilfield services in offshore China. Our core services are Drilling Services, Well Services, Marine Support and Transportation Services and Geophysical Services, which cover each phase of oil and gas exploration, development and production.
COSL possesses the largest fleet of offshore oilfield services facilities in China, including Asiaís most advanced 400-feet drilling rig and 8-streamer dual-detector seismic vessel. COSL is currently operating 22 drilling rigs ( of which 19 are jack-up rigs and 3 are semi-submersibles) , 2 platform supply vessels, 4 module rigs and 5 onshore rigs. Furthermore, COSL possesses and manages the largest offshore operation fleet of more than 70 supply vessels providing a complete spectrum of services, 4 oil tankers, 5 chemical carriers, 8 seismic vessels, 4 surveying vessels and a vast array of modern facilities and equipment including FET, LWD, and ONTRAK Tools for logging, drilling fluids, directional drilling, cementing, well completion and workover services. COSLís relatively completed oilfield service chain can achieve a win-win cooperation between the Company and its clients through single or turnkey services.