Pumping-improvement centralizer of pumping rod

Abstract

The invention relates to a pumping-improvement centralizer of pumping rod, comprising a central rod; wherein, the two ends of the central rod are provided with joints; the central rod is provided with a first centralizing body and a second centralizing body; the first centralizing body comprises three first centralizing claws; the second centralizing body comprises three second centralizing claws; when the pumping rod moves downwards, the first centralizing body moves upwards under the action of friction force, the first centralizing body and the second centralizing body are separated, and crude oil flows upwards by a clearance between the first centralizing claw and the second centralizing claw; when the pumping rod moves upwards, the first centralizing body moves downwards under the action of friction force, and the first centralizing body slides into the clearance of the second centralizing body to form a piston; when the pumping rod moves upwards and downwards, the first centralizing body and the second centralizing body can have the centralization function and prevent the friction between the pumping rod and the pumping pipe; when the pumping rod moves upwards, the pressure difference of the upper pressure and the lower pressure of the piston can be reduced and the pumping efficiency is improved.

Description

technical field [0001] The invention relates to an oil production equipment in the petroleum industry, in particular to a pumping aid centralizer for a sucker rod. Background technique [0002] At present, oil rod pumps are widely used in oil production in oil fields. The oil rod pump includes the sucker pipe, sucker rod, plunger and pump barrel. The main reason is that the utility model patent No. 03271902.7 discloses a sucker pipe and sucker rod anti-eccentric wear pair. , centralizer, fixed nut, lower anti-loosening cap, sucker rod collar, upper anti-loosening cap and the upper part of the anti-wear rod are threadedly connected, the sucker rod collar is on the upper anti-loosening cap, anti-wear bushing set On the anti-friction rod, the upper diameter of the outer surface of the anti-friction bushing is large, the diameter of the lower part is small, and the lower end is threaded. Threaded connection, so that the anti-wear bushing, centralizer, and fixed nut are assembl...

AI Technical Summary

Problems solved by technology

[0002] At present, oil rod pumps are widely used in oil production in oil fields. The oil rod pump includes the sucker pipe, sucker rod, plunger and pump barrel. The main reason is that the utility model patent No. 03271902.7 discloses a sucker pipe and sucker rod anti-eccentric wear pair. , centralizer, fixed nut, lower anti-loosening cap, sucker rod collar, upper anti-loosening cap and the upper part of the anti-wear rod are threadedly connected, the sucker rod collar is on the upper anti-loosening cap, anti-wear bushing set On the anti-friction rod, the upper diameter of the outer surface of the anti-friction bushing is large, the diameter of the lower part is small, and the lower end is threaded. Threaded connection, so that the anti-wear bushing, centralizer, and fixed nut are assembled into one, and can slide on the anti-wear rod, the lower anti-loosening cap is threaded with the lower part of the anti-wear rod, and the upper part of the sucker rod coupling is connected to the sucker rod , the lower part of the anti-wear rod is threaded to connect the sucker rod. Although this kind of anti-wear pair can reduce the friction between the oil sucker pipe and the sucker rod, the effect on preventing the wear of the plunger is not ideal, and the wear of the plunger will reduce the efficiency of the oil production pump. , and the main factor of the length of the pump inspection period is the leakage of the pump. The leakage mainly depends on the gap between the plunger and the pump barrel and the pressure difference between the plunger and the upper and lower pressures. The wear of the plunger is also related to the pressure difference. In direct proportion, trying to reduce the pressure difference between the upper and lower plungers can not only improve the efficiency of the pump, but also prolong the service life of the pump

Images