Sinopec Oilfield Service Corporation provides integrated petroleum engineering and oilfield technical services in China and internationally. It offers data acquisition, processing, interpretation to technology research and development, equipment manufacturing, and reservoir service delivering integrated geophysical solutions and support for oil and gas fields; and drilling and completion, drilling technology services, drilling tool manufacturing, and forming proprietary drilling technologies services for petroleum engineering. It also offers pre-drill prediction; real-time acquisition and monitoring; post-drill evaluation for exploration and development; and data acquisition, processing, interpretation, methodology research, and development of instruments and software; reservoir stimulation, oil and gas well testing, workover and sidetracking, technical services, and tailored solutions for domestic and international oil and gas exploration and production; and engages in the provision of feasibility studies; design, procurement, and construction services for onshore and offshore oil and gas fields; long-distance pipeline, oil and gas transporting process, storage and transportation, petrochemical supporting, building construction, water resources and hydropower, ports and waterways, electricity transmission, and distribution projects; LNG projects; and coal chemical engineering, geothermal utilization, energy saving, and municipal roads and bridges, as well as manufacturing of pressure vessels. The company was formerly known as Sinopec Yizheng Chemical Fibre Company Limited and changed its name to Sinopec Oilfield Service Corporation in March 2015. The company was founded in 1993 and is headquartered in Beijing, the People's Republic of China. Sinopec Oilfield Service Corporation is a subsidiary of China Petrochemical Corporation.