Novel airproof oil well pump

Abstract

The invention discloses a novel airproof oil well pump which is mainly composed of a pump barrel assembly and a plunger piston assembly (7) which is arranged inside the pump barrel assembly. The pump barrel assembly is composed of at least two pump barrels (2) and two adjacent pump barrels (2) are communicated with each other in a sealing mode. The novel airproof oil well pump changes the fact that the traditional oil well pump can only perform the functions of absorbing liquid and discharging liquid when a stroke begins and ends, discharging some gas in the process of stroke is achieved, influence of the gas is greatly reduced, and the amount of discharging liquid is increased. Due to the fact that reinforcement outer tubes are arranged between air exchange cavities, when the oil well pump works normally, influence of axial alternating load on dangerous sections of pump barrels of the oil well pump is enabled to be greatly reduced, service life of the oil well pump is prolonged, and processing difficulty is lowered. The novel airproof oil well pump has the advantages of being low in cost, long in service life, convenient to use and maintain and suitable for popularization and quantity production.

Description

technical field [0001] The invention relates to a novel anti-air oil well pump. Background technique [0002] Before the 20th century, the development of oil well pump technology at home and abroad was slow, and it was not until the middle of the 20th century that the whole barrel oil well pump was studied and produced simultaneously with the bushing type oil well pump. There are two technically controversial issues about oil well pumps: one is whether the whole barrel type oil well pump is better or the bushing type oil well pump is better; the other is whether it is better to have sand control grooves on the plunger or not to have sand control grooves. Until the 1980s, due to the significant improvement of the pump efficiency of the whole barrel pump, it is generally about 10% higher than that of the bushing pump, which prolongs the service life of the plunger pump barrel pair, and can save about 40% of high-quality steel. Instead of the bushing type oil well pump, the bu...

AI Technical Summary

Problems solved by technology

There are two technically controversial issues about oil well pumps: one is whether the whole cylinder type oil well pump is better or the bushing type oil well pump is better; the other is whether it is better to have sand control grooves on the plunger or no sand control grooves

These gases occupy part of the volume of the pump chamber, which will reduce the fullness of the pump chamber, resulting in the lagging of the valve ball of the oil well pump, and even the phenomenon of "air lock"

"Hydraulic shock" also occurs during "air lock", causing vibration of the rod pumping system and accelerating its damage

As a result, pumping wells are frequently operated, shortening the pump inspection cycle, and increasing development costs

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