Efficient oil well pump for horizontal well

Abstract

The invention provides an efficient oil well pump for a horizontal well. The efficient oil well pump comprises an upper joint, a pump cylinder, plunger center poles, plungers, center pole centering devices, a pin oil bleeder, a fixing valve assembly and a joint ball seat. The efficient oil well pump is characterized in that the plungers are two-stage type or three-stage type or four-stage type hollow plungers, the lower end face of each plunger is provided with a traveling valve arc-shaped valve seat, the center of each plunger is provided with one plunger center pole, the upper end of each plunger center pole is provided with one center pole centering device, the lower end of each plunger center pole is provided with a traveling valve arc-shaped valve element, and each traveling valve arc-shaped valve element is in threaded connection with the corresponding centering device and is in seal fit with the corresponding traveling valve arc-shaped valve seat, so that a traveling valve forced opening and forced closing mechanism is formed; each traveling valve arc-shaped valve element drives the corresponding plunger to conduct vertical linkage in the pump cylinder under the effect of vertical reciprocating movement of the corresponding plunger center pole, so that a plunger oil inlet and exhaust assembly is formed. According to the efficient oil well pump, the plunger oil inlet and exhaust assembly and the traveling valve forced opening and forced closing mechanism are adopted, so that the sealing effect is ensured, the pump efficiency is remarkably improved, and the service life of the pump is prolonged.

Description

Technical field [0001] The invention relates to a high-efficiency oil well pump for horizontal wells, which is used for oil recovery of highly deviated wells and horizontal wells. Background technique [0002] At present, rod well pumps (referred to as "well pumps") still occupy a dominant position in all oil production methods. It is estimated that there are more than 150,000 rod pump wells in use in my country's oil industry, and there are hundreds of thousands of rod pump wells in the world. Most domestic oil fields have entered the late stage of development, facing the influence of factors such as sand production in oil layers, high water content, polymer injection development, heavy oil thermal recovery, strong corrosive medium environment and poor well conditions, resulting in wear and leakage of oil well pumps , Corrosion, sand stuck, scaling, deformation and other faults make the maintenance-free period of the oil well pump shorter and shorter, which seriously affec...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency oil well pump for horizontal wells, which solves the problems of large leakage, low pump efficiency and short service life of conventional horizontal well oil well pumps

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