Highly effective bionic surface sealing valve oil-well pump

Abstract

The invention provides a high efficiency biomimetic surface sealing valve oil well pump. The invention is designed to completely solve the problems that because of the descending of the rod string caused by the attrition between the pumping machine pump plunger and the pump barrel and the attrition of the oil pipe, the accidents of the swabbing solid fine particle fluid are more, and the service life is short, the invention comprised a pump plunger and a pump barrel, wherein, two layers of elastic sealing bodies are sleeved outside the sieve tube of the central rod of the pump plunger, and an elastic sealing ring is sleeved outside the double elastic sealing bodies. When the pump plunger performs reciprocating motion in the pump barrel in the invention, the gap between the pump plunger and the pump barrel can be automatically adjusted, and matching with the surface sealing valve, the invention can reach the purposes of intelligence, highly effective and self sealing; the sealing ring structure is suitable for all the hydraulic pump plungers or multiple-plunger pumps, and the invention has the advantages that the leakage of the pump is reduced, the volume efficiency of the pump is enhanced, the eccentric wear of the rod in the rod-pumped wells of polymer flooding, thick oil, sanding and scaling is solved, the travel loss is reduced, the pump accident rate is reduced, the pump service life is lengthened, and the pump efficiency is enhanced.

Description

Technical field: [0001] The invention belongs to the field of mechanical lifting for petroleum exploitation, and is mainly used for mechanical lifting of underground crude oil, polymer-containing fluid, water-containing fluid, and ternary compound system. Background technique: [0002] At present, there are two contradictions due to the friction between the plunger 2 and the pump barrel 1 during the operation of the existing mechanical oil pumping plunger pumps at home and abroad (see FIG. 2 ). One is that when the gap between the plunger 2 and the pump barrel 1 is designed to be small, the friction between the plunger 2 and the pump barrel 1 is large when the sucker rod 4 goes down, which increases energy consumption; at the same time, the sucker rod 4 generates The bending and friction with the oil pipe 5 will cause the sucker rod to break or the oil pipe to wear and leak, which shortens the pump inspection period and increases the crude oil development cost. This phenome...

AI Technical Summary

Problems solved by technology

Partial wear of the sealing line or the adhesion of solid particles affects the sealing effect, increases the amount of liquid leakage, and reduces the pump efficiency

In addition, the ball and seat are in the plunger cavity, so that the plunger cannot be made too small, which limits the current plunger pump to only Ф28mm, which cannot meet the lifting needs of low-production wells

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