At present, the number of rod pumps in China's oil field accounts for a large proportion, most of which are plunger type oil well pumps, and conventional plunger pump has become one of the main oil recovery methods.
Because most of the domestic oil field has entered the high water cut development period, coupled with the impact of high sand, high temperature steam heavy oil exploitation, medium mining and strong polymer corrosion and poor well conditions and other factors, the plunger pump of the pump barrel and plunger wear, corrosion, scratches more and more serious, the average pump detection period and the shorter, some even less than 30 days are needed for the pump, seriously affect and improve the overall economic efficiency of oilfield development. Many institutions at home and abroad have invested a great deal of strength to study the failure causes and protection measures of the pump. One of the effective methods is to optimize the material and surface treatment process of the pump cylinder and plunger.
The tribology system is composed of pump barrel and plunger friction pair and surrounding working conditions and conditions. The corrosion wear volume of the system is determined by the total amount of corrosion and wear of piston pump and the amount of corrosion wear of plunger. The corrosion and wear volume of pump barrel and plunger is determined by the physicochemical properties, mutual movement relations, working environment and conditions. Finally, judging from the angle of the oil pump, the choice of material and surface treatment process of the pump barrel and plunger is the decisive factor to determine the corrosion wear amount of the tribology system. Health level self-priming pump
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