Offshore Oil Engineering Co., Ltd. provides design, procurement, construction, offshore installation, commissioning, and maintenance services for offshore oil and gas development projects in China and internationally. It also engages in engineering and general contracting, development of offshore and shallow-water oil and gas, deepwater jacket engineering, fabrication and installation, and subsea production systems and SURF. The company designs and develops LNG terminals, storage tanks, and natural gas liquefaction plants, and is involved in modular construction, offshore wind and hydrogen energy, marine ranching, and green energy equipment. It offers inspection and commissioning, IMR and decommissioning, digital simulation, and digital twin solutions, and operates 19 vessels and yards. Founded in 2000 and headquartered in Tianjin, China, it is a subsidiary of China National Offshore Oil Corporation.