Beijing CNOOC Engineering provides comprehensive technical services for offshore oil and gas field development.

Zhuhai Hengqin focuses on subsea production system integration and installation services.

Shenzhen Haineng specializes in intelligent control systems and IoT devices for the petroleum industry.

Guangzhou South Sea focuses on deepwater equipment manufacturing for South China Sea oil and gas development.

Jinan Luneng specializes in petroleum industry sensors, instruments and intelligent monitoring systems.

Yantai Hengtong focuses on R&D and manufacturing of petroleum drilling pumps and mud pumps.

Qingdao Marine specializes in offshore platform equipment manufacturing, exporting to Southeast Asia and the Middle East.

Shandong Shengli leverages Shengli Oilfield expertise to produce drilling, production and gathering equipment.

Shanghai Hanhai focuses on R&D and manufacturing of electrical control systems and automation equipment for oil and gas.

Shanghai Oriental manufactures oil and gas extraction equipment including christmas trees, BOPs and choke manifolds.

Shanghai DeepBlue provides engineering design and technical services for deepwater oil and gas field development.

Jiangsu Hengda specializes in production of petroleum tubular goods including tubing, casing and drill pipes.