Comprehensive oil and gas engineering technical service company. China Petrochemical Oil Service is a comprehensive oil and gas engineering technical service company controlled by sinopec group, and the earliest offshore oil and gas exploration service provider in China. Founded in 1950, the company has more than 50 years of operating performance and rich experience in project implementation. As the leader of the comprehensive oil service industry chain in China, Sinopec Oil Service is committed to providing customers with all-round technical and service support, involving oil, natural gas, coal and other fields.