CNOOC Energy Technology & Services Limited operates as an offshore and onshore oil and gas production company in China and internationally. The company offers energy technology services, including oilfield engineering technology services, equipment manufacturing and maintenance services, and oil production services; technical services to oil and gas companies, including engineering and technical services, equipment design, manufacturing and operation, maintenance services, and integrated oil and gas field production services; oil field recovery rates; supervision and inspection; oil field operation support; unconventional oil and gas integrated services, and equipment and facilities operation and maintenance integration; and FPSO production and operation. It also provides low-carbon environmental protection and digitalization services, which focuses on the development of technologies and services, such as safety and emergency response, energy conservation and environmental protection, water treatment, green coatings, cold energy utilization, and digitalization, as well as engages in offshore wind power related activities. In addition, the company offers digital technology, green energy, and green product supplies. Further, it provides energy logistics services, including support services for the production process and downstream sectors of the offshore oil industry; logistical support for offshore oil and gas field development through offshore material supply and catering services; assistance services for oil companies in offshore oil and gas transportation through coordination services; and distributes oil and gas by-products through sales services. The company was founded in 2005 and is headquartered in Beijing, China. CNOOC Energy Technology & Services Limited operates as a subsidiary of China National Offshore Oil Corporation.