CNOOC Energy Technology & Services Limited is an offshore and onshore oil and gas production company operating in China and internationally. It provides energy technology services such as oilfield engineering, equipment manufacturing and maintenance, and oil production services, along with technical support to oil and gas companies including engineering, equipment design and operation, maintenance, and integrated oil and gas field production services. The company also offers low-carbon environmental protection and digitalization services, including safety and emergency response, energy conservation, water treatment, green coatings, cold energy utilization, and digitalization, as well as offshore wind power activities. In addition, it provides energy logistics services, including support for offshore oil production and downstream sectors, logistical support through offshore material supply and catering, coordination services for offshore oil and gas transportation, and distribution of oil and gas by-products. Founded in 2005 and headquartered in Beijing, China, it operates as a subsidiary of China National Offshore Oil Corporation.