Self-rotary rotational flow oil well pump

Abstract

The invention relates to a self-rotary rotational flow oil well pump which comprises an upper plunger assembly, a lower plunger assembly, a pump cylinder assembly, a spiral assembly and a fixed valveassembly. The upper plunger assembly comprises an upper oil outlet valve cover, an upper oil outlet valve ball, an upper oil outlet valve seat, a plunger upper connector, an upper plunger, an upper connecting piece and a mesh type one-way bearing; the lower plunger assembly comprises a limiting screw cap, a self-rotary guide rail, a lower connecting piece, a lower plunger, a lower oil outlet valvecover, a lower oil outlet valve ball, a lower oil outlet valve seat and a plunger lower connector; the spiral assembly comprises a spiral body and a triangular centralizer; the self-rotary guide railsleeves on the mesh type one-way bearing; the lower plunger assembly and the spiral assembly are accompanied with circumferential rotation movement during the lower stroke, so that the eccentric wearbetween the plungers and the pump cylinder can be effectively relieved, the pump checking period and the service life are prolonged; a rotational flow is produced in a pump cavity, so that the speedis accelerated, sucked impurities are carried out of a pump body, the pump cavity is cleaned, impurities are prevented from adhering to the inner wall of the pump cylinder and depositing at a fixed valve, the pump checking period is prolonged, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of oil well pumps, and in particular relates to an autorotation swirl oil well pump, which is used for operation in inclined oil wells with various impurities such as sand and corrosion debris. Background technique [0002] In my country, major oilfields have entered the middle and later stages of mining, and sundries such as sand production at the bottom of the well, corrosion debris of pipes and rods, and sand consolidation agents after chemical sand control operations have entered the oil well pumps and cannot be discharged in time. Deposits at fixed valves. Then it affects the problems of opening lag and lax setting of the fixed valve ball, which seriously affects the service life of the oil well pump and the efficiency of crude oil extraction. And the vast majority of existing oil and gas wells are directional wells, so the problem of eccentric wear of the pump barrel and plunger will inevitably become ...

AI Technical Summary

Problems solved by technology

However, the cyclone is set at the oil-operated valve, which cannot solve the problem of impurity particles depositing at the fixed valve

The pump body and plunger body of the large-diameter all-ceramic pump are made of composite industrial structural ceramic materials, and the problem of eccentric wear of the pump barrel and plunger can be alleviated by changing to a more wear-resistant material, but the linear expansion coefficient of different materials is easy to cause Problems with stuck pump and eccentric wear

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