Our polished rod clamp is of hinge-jointed butterfly structure. It adopts precision casting,  normalized thermal treatment and fine process. All of its technical specifications meet the American Petroleum Institution API SPEC 11B standard. It has solved the problem of the polish rod body damage caused by the taper slip jamming dens pressing into rod body and greatly reduced the accident of polish rod rupture. It also avoids the phenomenon of seriously hurting the seal element to cause oil leakage due to the scar on the polish rod surface in the process of regulating stroke parameters or changing pump setting depth.

Restructured from SINOPEC in 1997, Puyang Zhongshi Group Co., Ltd has 18 years manufacturing experience of petroleum machinery products till now, we have competitive prices of our main products of casing accessories likebow spring centralizer, solid rigid centralizer,float equipment, cementing plug etc.

We have 9 factories, more than 500 employees, and many kinds of production equipments.

We have certificates of API 5CT,6A,10D,11AX,11E, ISO 14001 and 9001.

With 10 years exporting experience,we have exported to more than 30 countries such as America,Canada,Russia,Venezuela,Columbia,Thailand,Indonesia ,UAE,Saudi Arabia,Kazakhstan etc.