Shelfoil Petroleum Equipment & Services Co., Ltd.

德州大陆架石油工程技术有限公司 is a state-owned high-tech enterprise specializing in the research, development, manufacturing, sales, and technical services of petroleum downhole tools and oilfield chemical additives. It serves as the research pilot and achievement transformation base for the China Petrochemical Group Petroleum Engineering Technology Research Institute Co., Ltd. (a Sinopec subsidiary).

Headquartered in Dezhou Economic Development Zone, Shandong Province, China, the company has over 30 years of industry experience. Its core products encompass a wide range of solid and completion tools, including liner hangers (tail-pipe hangers), stage cementing collars, casing centralizers, cement heads, hydraulic jet impactors, hydraulic oscillators, toe-end sliding sleeves, bridge plugs, open-hole packers, and various oilfield chemicals such as drilling fluids, fracturing fluids, and cement slurries.

The company operates primarily across major Chinese onshore and offshore oil and gas fields, supporting complex operations in ultra-deep wells, high-temperature/high-pressure environments, and corrosive conditions. It also exports products to more than 30 countries and regions, including the United States, Canada, Russia, Saudi Arabia, Iraq, Turkmenistan, and Kazakhstan. It holds certifications including API Q1, ISO 9001, CNAS, and specific API product approvals, along with premium thread licenses, and contributes to drafting over 20 national and industry standards.

Recognized as a national specialized and sophisticated "little giant" enterprise, a benchmark participant in the State-owned Assets Supervision and Administration Commission's "Science and Technology Reform Action," and a national manufacturing single-item champion, the company maintains a leading position in China's petroleum engineering tools sector, particularly for advanced liner hanger technologies used in demanding exploration and development projects.