Shengli oilfield tongtai international trading company (tongtai), one of the wholly-owned subsidiary company of sinopec shengli oilfield co., ltd, is a chinese leading provider of oilfield equipment used for oil exploration, drilling and varieties of field services. The company covers an area of 67, 000 square meters the high-tech park of dongying economic development zone. Since its establishment, the company has drawn on its advantage to extend to new business scope and has kept a sound and fast development momentum. Tabular products we provide our customers with seamless and erw oil casing, tubing and pipeline conforming to api spec. Drilling equipment and settings these products include: rig, wellhead assembly, drill pipe, drill collar, 3-cylinder single function mud pump, muc pump liner and valve, etc. Production machinery these products include: electrical submersible pump system, rotaflex pumping unit, beam pumping unit, sucker rod, therm-insulated tubing, sucker rod pump, pc pump, wire wrapped screen, etc. Others we also export logging instruments, all kinds of valves, coring bit and pdc drilling bit, natural gas engine and natural gas generating set, etc.