Hilong Holding Limited is an investment company, which engages in the manufacture and distribution of oil and gas drilling equipment. It operates through the following segments: Oilfield Equipment Manufacturing and Services; Line Pipe Technology and Services; Oilfield Services; and Offshore Engineering Services. The Oilfield Equipment Manufacturing and Service segment comprises of the production of oilfield equipment and provision of OCTG coating services. The Line Pipe Technology and Service segment provides services related to oil and gas pipe line and production of coating materials for anti-corrosive and anti-friction purposes. The Oilfield Services segment offers well drilling services, integrated comprehensive services, OCTG trading, and related services to oil and gas producers. The Offshore Engineering Services segment consists of offshore engineering services and offshore design services. The company was founded in 2001 and is headquartered in Shanghai, China.