Eccentric wear prevention device of pumping well

Abstract

The invention relates to an eccentric wear prevention device of a pumping well. In a field use process of an eccentric wear prevention device of a pumping rod, the eccentric wear prevention effect is not obvious, and damage, breaking and dropping of the pumping rod and an oil pipe are caused. The eccentric wear prevention device of the pumping well is provided with a central rod, and the upper end and the lower end of the central rod are connected with an upper connector and a lower connecter respectively, wherein the upper connector and the lower connecter are both cylindrical. The central rod between the upper connector and the lower connector is sleeved with a cylindrical wear prevention body. The diameter of the wear prevention body is larger than that of the upper connector and that of the lower connector, and clearances are reserved between the wear prevention body and the upper connecter and between the wear prevention body and the lower connector. Correcting bodies are arranged on the upper end face and the lower end face of the wear prevention body respectively and are in the shape of an end of an olive, and the diameters of the correcting bodies reduce gradually upwards and downwards from the end faces of the wear prevention body. Correcting holes identical with the correcting bodies in shape are formed in the bottom face of the upper connector and the top face of the lower connector. The eccentric wear prevention device is long in wear prevention time, prevents the pumping rod to make direct contact with the oil pipe to generate wearing, prolongs the service life of the pumping rod and the service life of the oil pipe, and maintains normal production of oil wells.

Description

technical field [0001] The invention relates to a device for preventing eccentric wear of sucker rods and oil pipes in oil exploitation operations, in particular to a device for preventing eccentric wear of oil pumping wells. Background technique [0002] As oilfield development enters the middle and late stages, the phenomenon of eccentric wear of sucker rods and tubing will intensify, seriously affecting oilfield production. Although there are many types of anti-eccentric wear devices for sucker rods, the effect of anti-eccentric wear is not obvious during field use, and there is still a problem of local severe wear, which causes damage and breakage of sucker rods and oil pipes, directly Affect the normal production of the pumping well, resulting in an increase in the maintenance cost of the oil well operation. Contents of the invention [0003] The object of the present invention is to provide a pumping well anti-eccentric wear device which has a simple structure and...

AI Technical Summary

Problems solved by technology

Although there are many types of anti-eccentric wear devices for sucker rods, the effect of anti-eccentric wear is not obvious during field use, and there is still a problem of local severe wear, which causes damage and breakage of sucker rods and oil pipes, directly Affect the normal production of the pumping well, resulting in an increase in the maintenance cost of the oil well operation

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