China Oilfield Services Limited (COSL) is an integrated oilfield service provider with over 50 years of experience in offshore oil and gas operations. COSL listed in both Shanghai and the HK Stock Exchange with its four major business segments of geophysical services, drilling services, well services and marine & transportation services covering all phases of exploration, development and production of oil and gas resources. COSL is the worlds fourth largest offshore drilling fleet and Asia's premier driller. Today, COSL operates over 40 drilling rigs including 32 are jack-up drilling rigs and 10 are semi-submersible drilling rigs, 2 accommodation rigs and 5 modular rigs. In addition, COSL also owns and operates the largest and most diverse shipping fleets in offshore China, including 69 working vessels and 3 oil tankers, 4 chemical carriers,7 seismic vessels, 7 surveying vessels. COSL represents one of the most technically complete package of integrated oilfield drilling and production services including a vast array of modern facilities and equipment for logging, drilling fluids, directional drilling, cementing and well work-over services, including FCT （Formation Characteristic Tool）, FET（Formation Evaluation Tool）, LWD （Logging-While-Drilling） and ERSC （ELIS Rotary Sidewall Coring Tool）, etc. COSL provides customers with operation services for a single and integrated services throughout China and Southeast Asia, Australia, Middle East, America, North Africa, and North Europe. COSL maintains one of the highest safety records in the industry with strict adherence to the international QHSE standards and providing first-class services for customers. COSL endeavors to provide safe, efficient and valued services for domestic and international customers as we grow to become one of the world's top-notch oilfield service companies.