DUPM was founded in 1961. DUPM has been granted the right to use the Official API Monogram on its products(in 1993) and has been in researching and developing many kinds of drilling equipments for half a century, such as downhole motors, casing and tubing heads and hangers, tool joints, drill stem(pipe) subs, piston mud pumps(drilling pumps) and accessories(components). With advanced processing technology and equipments, DUPM is capable of producing all the parts of its products by itself. Its advanced detecting tools and complete Quality Management System（QMS） ensure to make good quality products. DUPM is one of the largest manufacturers of downhole motor in China and has a productivity of 6000 sets of downhole motors and 100 sets of Mud pumps per year. The sales amount of DUPM in last year is more than 60,000,000USD.