Hilong Holding Limited, an investment holding company, provides oil field equipment and services worldwide. The company operates through Oilfield Equipment Manufacturing and Services, Line Pipe Technology and Services, Oilfield Services, and Offshore Engineering Services segments. The Oilfield Equipment Manufacturing and Services segment produces and sells oilfield equipment; and offers oil country tubular goods (OCTG) coating services. The Line Pipe Technology and Services segment provides services related to oil and gas pipeline; and produces coating materials for anticorrosive and anti-friction purposes. The Oilfield Services segment offers well drilling services; integrated comprehensive services; and OCTG trading and related services to oil and gas producers. The Offshore Engineering Services segment provides offshore engineering and design services. It is also involved in the manufacture, trading, and distribution of oil and gas equipment; the manufacture and distribution of hardbanding materials; the research and development related to technology of manufacturing oil and gas equipment, as well as coating services; the research, inspection, and repairment of oil and gas equipment; and the provision of offshore oilfield services. The company was founded in 2002 and is headquartered in Shanghai, the People's Republic of China. Hilong Holding Limited is a subsidiary of Hilong Group Limited.