Sinopec Oilfield Service 

Sinopec Oilfield Service Corporation provides integrated petroleum engineering and oilfield technical services in China. It operates through five segments: Geophysics, Drilling Engineering, Logging and Mud Logging, Special Down-Hole Operations, and Engineering Construction. The Geophysics segment offers terrestrial and marine geophysical exploration, development, and technical services. The Drilling Engineering segment provides land and ocean drilling design, construction, and technical services, as well as drilling equipment. The Logging and Mud Logging segment offers land and ocean project contracting and technical services for collection, monitoring, transmission, processing, and interpretation, as well as evaluation of wellbore oil and gas, geology, and engineering information. The Special Down-Hole Operations segment provides oil engineering technical and construction services, including oil (gas) testing, well repair, lateral drilling, fracturing, acidizing, and oil assignments. The Engineering Construction segment 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 is headquartered in Beijing, the People's Republic of China. Sinopec Oilfield Service Corporation is a subsidiary of China Petrochemical Corporation.