Righting structure for preventing sucker rod pump plunger from eccentrically-wearing

Abstract

The invention relates to a righting structure for preventing a sucker rod pump plunger from eccentrically-wearing. The righting structure for preventing the sucker rod pump plunger from eccentrically-wearing comprises a righting device, an equal-diameter sucker rod, a pump cylinder, and the plunger. The righting device and the plunger are coaxially arranged in the pump cylinder, the righting device is located at the outer end of the plunger, and an outer wall of the righting device is in threaded fit with an inner wall of the pump cylinder; and a sucker rod guiding hole is formed in the center of the righting device in the axial direction, one end of the equal-diameter sucker rod penetrates through the sucker rod guiding hole and is connected with the plunger, and an oil-through hole is formed in the righting device. According to the righting structure for preventing the sucker rod pump plunger from eccentrically-wearing, the righting device is installed on the inner wall of the upper end of the pump cylinder, and loading of the plunger and the sucker rod is not increased; and the plunger connected with the equal-diameter sucker rod is always located at the center of the pump cylinder through a limiting effect of the righting device on the equal-diameter sucker rod, and the problem of eccentric wear of the plunger is solved.

Description

technical field [0001] The invention relates to the technical field of oil extraction equipment, in particular to a centralizing structure for preventing eccentric wear of a rod-well pump plunger. Background technique [0002] With the continuous development of oil exploration and development, rod pump oil production system is widely used in oil field development. In a vertical well, when the sucker rod drives the plunger to reciprocate up and down, a helical bending deformation occurs under the action of pressure or tension, which causes the outer surface of the plunger connected at the lower end to be easily contacted and rubbed against the inner wall of the pump barrel, resulting in eccentric wear of the plunger and the pump Leakage seriously affects the pumping efficiency of the oil pumping system. In a deviated well, since the well depth track is at a certain angle to the vertical direction, the plunger's lower surface is always in contact with the inner surface of the...

AI Technical Summary

Problems solved by technology

[0004] The invention aims to provide a centering structure for preventing the eccentric wear of the plunger of the rod pump, which can solve the problem of the eccentric contact between the plunger and the inner wall of the pump barrel caused by the bending of the sucker rod in the existing rod pump pumping system

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