Petro-king Oilfield Services Limited, an investment holding company, provides oilfield technology services in the People's Republic of China, the Middle East, and internationally. It operates through Oilfield Project Tools and Services, Consultancy Services, and Others segments. The company offers oilfield project tools and services, such as oilfield development plan, procurement advice, tools and equipment installation, and on-site project management services, as well as assembles and sells oilfield project tools. It also provides integrated project management services that include engineering and designing an overall development plan for an oilfield project; assisting and providing advice on sourcing; oilfield project management services in the areas of drilling, well completion, downhole operation, oilfield equipment installation, and production enhancement; and on-site operational management, supervision, support, and advice services. In addition, the company offers supervisory services that comprise management, supervision, and technical support in technical areas in various stages of the oilfield project. Further, it is involved in the trading of oilfield tools and equipment. The company was formerly known as Termbray Petro-king Oilfield Services Limited and changed its name to Petro-king Oilfield Services Limited in May 2014. Petro-king Oilfield Services Limited was founded in 2002 and is headquartered in Shenzhen, the People's Republic of China.