Discharge assisting and liquid increasing device of oil pumping machine

Abstract

The invention relates to a discharge assisting and liquid increasing device of an oil pumping machine, which is characterized by mainly comprising an upper joint, a core pipe, a spring, a sealing bowl assembly, a sealing ring, a steel ball, a ball seat and a lower joint, wherein the core pipe is formed into a core pipe whole by inserting, fixing and connecting a core pipe body A and a core pipe body B, the upper end of the core pipe body A is in threaded connection with the upper joint, a sealing frame in sliding fit with the core pipe body A is arranged on the core pipe body A, a bowl-shaped sealing expansion ring is sleeved on the sealing frame, the sealing ring is arranged at the lower part of the sealing expansion ring, four axial semicircular long slots which are uniformly distributed in the inner hole of the core pipe body B are coincided and connected with the inner holes, a ball blocking rod is arranged at the upper part of the inner hole of the core pipe body B, the ball seat is arranged at the lower part of the inner hole of the core pipe body B, the steel ball is arranged on the ball seat, and the lower end of the core pipe body B is in threaded connection with the lower joint. The invention has the advantages that the discharge assisting and liquid increasing device is connected with an oil pumping rod string in segments and is used for lifting the crude oil in an oil pipe in segments, and the ascending resistance of a plunger piston is lightened, thereby reducing the internal leakage of a pump barrel and increasing the fluid production rate of an oil well.

Description

technical field

[0001] The invention belongs to a pumping unit for an oil production well, and in particular relates to a pumping unit that assists drainage and enhances liquid. Background technique

[0002] The oil pumped up by the pumping unit of the oil production well contains water, crude oil and fine sand. The upward resistance of the plunger of the pumping unit is very large, and there is a lot of leakage in the pump barrel, which seriously affects the fluid production of the oil well. Due to the eccentricity of the rod column in the oil pipe, the sealing cup is abnormally worn, which prolongs the service life of the cup and increases the maintenance cost. Contents of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned technologies, and provide a pumping unit auxiliary pumping booster, which is an auxiliary pumping tool for the pumping unit of an oil production well, and it is connected to the sucker ro...

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