Flexible metal oil well pump device in horizontal well and fixed valve ball reset device

Abstract

The invention provides a flexible metal oil well pump device in a horizontal well and a fixed valve ball reset device. The fixed valve ball reset device comprises a spring, a push rod and a fixed valve ball, the spring sleeves the push rod, during an upper stroke, the fixed valve ball moves, and the spring is compressed by the push rod, and during a down stroke, the spring assists the fixed valveball in reset through the push rod. According to the device, the reset structure is arranged, and comprises the spring, the push rod and a spring pressure cap, so that assisted reset of the fixed valve ball in the horizontal well is realized, when a valve group is opened, the valve ball pushes the push rod to compress the spring, the spring releases elastic force when the valve group is closed, the valve ball is pushed to reset through the push rod, and an action of the valve ball no longer completely relies on the action of gravity of the valve ball for reset. Under the working conditions ofthe horizontal well or a highly-deviated well, the problem that the valve ball is delayed during reset or cannot be reset due to the fact that a direction of the action of gravity is inconsistent witha reset direction of the valve ball is avoided, normal work of the valve group is guaranteed, and normal production of the horizontal well is achieved.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a flexible metal oil well pump device and a reset device for fixing a valve ball in a horizontal well. Background technique [0002] At present, the lifting technology of horizontal wells and highly deviated wells is widely used in domestic oilfields, and the effect of increasing production is remarkable. As the oilfield development enters the middle and late stages, the dynamic liquid level in the wellbore gradually decreases, forcing the pump hanging position of the oil well pump to gradually deepen. Problems such as eccentric wear, floating valve group, and fixed valve group cannot work normally. There is a small gap between the plunger and the pump barrel of ordinary pumps. The eccentric force generated by the self-weight of the rod acts on the plunger, which changes the normal friction state between the sealing surface of the plunger and the pump barrel, resulting in e...

AI Technical Summary

Problems solved by technology

In addition, the valve balls of the floating valve and the fixed valve of ordinary pumps rely on self-resetting to close the valve. In high-inclination and horizontal well sections, the direction of gravity deviates from the reset position and cannot be reset normally, resulting in reduced pump efficiency and even failure of the valve group. Work

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