Puyang Zhongshi Group Co. , Ltd. , restructured from SINOPEC in 1997 has 20 years experience on manufacturing petroleum machinery products.The company registered capital is 10 million U.S.dollars,with annual export 30 million U.S.Dollars.
Rod pump is equipped with a support joint, support joint connected on the tubing string, and it is together with the tubing string down to the bottom. Plunger assembly is connected on the rod string and together with the whole pump down to support joint position, pump is fixed within the support joint by external force, plunger assembly is together with the sucker rod string up and down reciprocating movement to achieve pumping work.
