Double-tooth downhole pump follow-up centering eccentric wear prevention device

Abstract

The invention provides a double-tooth downhole pump follow-up centering eccentric wear prevention device, which is applied to a downhole pump eccentric wear prevention working condition. The eccentricwear prevention device consists of a centering supporting device, a centering body, a cone-fin locking device, a conical tooth type centering device, an impeller tooth type centering device and a positioner, wherein the centering body carries out centering positioning according to the positioner and is supported by the centering supporting device, liquid of the downhole pump is sprayed to an annular space of a rod pipe according to a flow guide hole and an upper spraying hole of the centering body, the conical tooth type centering device and the impeller tooth type centering device together form a double-tooth type double eccentric wear prevention device and complete a spacing in both up and down directions according to an upper spacing plate and a spacing baffle, and the conical tooth type centering device achieves a follow-up centering of a plunger and a pump cylinder according to a double-layer dynamic pressure liquid film and prevents solid particles from being deposited above theplunger through a stirring action; the cone-fin locking device completes cone-fin type underground rapid positioning according to a cone-fin body and locks the centering body in the centering supporting device, thereby avoiding eccentric wear of the downhole pump.

Description

technical field [0001] The invention relates to an anti-eccentric wear device for downhole pumps in oil and gas wells and unconventional gas wells, in particular to a follow-up centering anti-eccentric wear device for downhole pumps using double-tooth anti-eccentric wear technology and cone-fin positioning technology . Background technique [0002] The downhole pump of oil and gas wells and unconventional gas wells will have the problem of eccentric wear between the plunger and the pump barrel during the suction operation. At present, the main measure to prevent eccentric wear is to use tubing or casing centralizers. For the downhole pump plunger The research on anti-eccentric wear equipment dedicated to eccentric wear between the pump barrel and the pump barrel is less, and the commonly used tubing or casing centralizers can be divided into two types: elastic centralizers and rigid centralizers. [0003] The elastic centralizer is designed according to the spring principle...

AI Technical Summary

Problems solved by technology

[0005] In order to effectively solve the problem of eccentric wear of downhole pumps in oil and gas wells and unconventional gas wells and overcome the defects and deficiencies of existing anti-eccentric wear equipment and technologies, the purpose of this invention is to provide a double-tooth type random wear-resistant anti-eccentric wear pump for downhole pumps Dynamic centering anti-eccentric wear device

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