China Oilfield Services Ltd.

China Oilfield Services Limited (COSL) is an oilfield services provider in the offshore China market. Its services cover each phase of offshore oil and gas exploration, development and production. Its four core business segments are geophysical services, drilling services, well services, marine support and transportation services. COSL possesses the largest fleet of offshore oilfield services facilities in China. To date, COSL operates 24 drilling rigs, 2 accommodation rigs, 4 module rigs and 6 land drilling rigs. In addition, COSL also owns and operates the largest and most diverse fleet in offshore China, including more than 70 working vessels and 4 oil tankers, 5 chemical carriers, 8 seismic vessels and 4 surveying vessels.