Sacrificial anode and protective cathode-oil-well pump anti-corrosive apparatus

Abstract

The invention relates to a corrosion resistant device for an oil well pump which utilizes a sacrificial anode to protect a cathode. The corrosion resistant device utilizes the principle of protecting the cathode by sacrificing the anode in electrochemistry and takes zinc, lead, magnesium and other active metals as the anode of the oil well pump. The production method is as follows: the nipple of the oil well pump is processed according to the technical specification of the oil well pump firstly and the length of the nipple is 400mm to 500mm; then the nipple is put into a specially designed rod cavity; magnesium or aluminium or zinc metal blocks are converted into liquid by heating and melting and then cast into the nipple cavity of a special oil well pump; and shaping, thermal insulation, slow cooling, mold unloading and mechanical processing are carried out, a coarse blank is processed into a smooth revolution body, thread at the two ends of the oil well pump is processed, and collars are installed, therefore, the anode assembly of the oil well pump is formed. The instillation method is as follows: during the process of putting down the oil well pump, the anode of the pumping rod is connected in series with the collar at the lower end of the oil well pump and collar is screwed.

Description

Technical field [0001] The invention relates to an oilfield anticorrosion technology, in particular to a technology capable of slowing down the corrosion of oil well pumps. Background technique [0002] At present, the known anti-corrosion technology of oil pumps in oil fields mainly adopts the method of surface coating protection. For example, the surface of the pump barrel is painted with anti-rust paint, the coupling of the oil pump adopts the method of blackening the surface, or the pump barrel adopts multi-component penetration The method of spraying the surface of the plunger, the method of using stainless steel instead of ordinary steel for the upper and lower joints of the plunger, the ball seat, and the method of replacing ordinary steel with stainless steel. These methods undoubtedly have a certain protective effect on the anti-corrosion of the oil pump, but the effect is not good. , the protection period is short and the cost is high. In industrial enterprises, e...

Images