Jiangsu Hengda specializes in production of petroleum tubular goods including tubing, casing and drill pipes.

Jiangsu Haili specializes in R&D and manufacturing of petroleum drilling and production equipment.

Jiangsu Rutong Petro-machinery Co., Ltd., founded in 1989, is a national high-tech enterprise specializing in R&D, design, manufacturing, sales and service of petroleum machinery equipment.