Sinopec Oilfield Service Corporation (SSC), a subsidiary under Sinopec Group, is a large integrated petroleum engineering and technology service provider in China. With a history of over 60 years' excellent performance, it is one of the leading integrated oilfield service providers in China.

On June 28, 2012, Sinopec Oilfield Service Corporation was established after Sinopec Group integrated the petroleum engineering business of its 8 oilfields, who are Shengli Oilfield, Zhongyuan Oilfield, Jianghan Oilfield, Jiangsu Oilfield, Henan Oilfield, Huabei Oilfield, Xinan Oilfield and Huadong Oilfield, with Sinopec Petroleum Engineering Management Department, Sinopec International Petroleum Service Corporation and Sinopec Shanghai Offshore Petroleum Bureau. In 2014, it went public in Shanghai Stock Exchange (SH600871) and HKEx (HK1033).

Sinopec Oilfield Service Corporation has 7 regional subsidiaries, 4 specialized subsidiaries, 4 institutes, 3 engineering design companies, and 46 research centers. The 7 regional subsidiaries refer to Shengli, Zhongyuan, Jianghan, Xinan, Huabei, Huadong subsidiaries and Shanghai Offshore Engineering Corporation. And the 4 specialized companies are Sinopec International Petroleum Service Corporation (Sinopec Service), Sinopec Geophysical Corporation， Sinopec Petroleum Engineering & Construction Corporation and Sinopec Matrix Co., Lid. Till the end of 2020, there were nearly 1600 technical and engineering crews, and nearly 70000 employees. Its business is mainly involved in 5 sectors which are geophysics, drilling, logging, downhole service and petroleum engineering and construction. Its full chain services range from exploration, drilling, well completion, petroleum production, oil and gas gathering and transmission to well abandonment. Based on accumulated experiences, cutting-edge equipment and strong R&D capabilities, SSC provides integrated services in many areas such as shale gas, tight gas, high sulfur gas, extra deep oil and gas fields and mature oilfields. It has provided full chain services consisted of drilling, fracturing and well testing to Fuling Shale Gas Project, which is the first Shale Gas commercial development project of China.

SSC is dedicated to becoming a world class integrated oilfield service provider. With qualified services, differentiate market positioning and cost-related strength, it has established a diversified client base both at home and abroad. It provides petroleum engineering service in more than 20 provinces in China and executes oilfield service projects in more than 30 foreign countries abroad. It is listed in petroleum engineering markets of national oil company of Saudi Arabia, Kuwait and Ecuador with great influence.