Surface textured fracturing pump plunger and its dynamic sealing system performance test method

Abstract

The invention discloses a surface textured fracturing pump plunger and a performance test method for a dynamic seal system of the plunger. A forced lubricant is accommodated in the left side of a seal assembly; an intracavity fracturing fluid is accommodated in the right side of the plunger; a cylindrical or conical texture is arranged on the cylindrical surface of the plunger; and the surface texture adopts a plurality of cylindrical or conical pits which are uniformly distributed or staggered in the peripheral direction of the cylindrical surface of the plunger. During testing, the method comprises steps as follows: assembling test parts, debugging test devices, recording initial data, starting a motor, collecting a reading number of each sensor at an experimental stage, observing abrasion loss and surface grinding cracks of plunger test pieces and seal assembly pieces, and processing and analyzing recorded experimental data. According to the invention, a surface texture technology is applied to the fracturing pump plunger, the surface texture technology applied to the dynamic sealing field of contact forms of rigid materials and flexible materials is broken through, the effects of remarkable reduction of friction coefficients of the dynamic seal system and temperature rising reduction are achieved, and the service life of the dynamic seal system is prolonged.

Description

technical field [0001] The invention belongs to the field of oil exploitation equipment, and in particular relates to a surface-textured fracturing pump plunger and a method for testing the performance of a dynamic sealing system thereof. Background technique [0002] The fracturing pump is an important equipment for fracturing and acidizing operations in the oil field to increase the production of oil and gas wells. The plunger dynamic sealing system is its key component and also the main vulnerable part. Its sealing performance and tribological performance directly affect the normal implementation of acidizing operations. Under high stroke times, the surface of the plunger and the surface of the sealing ring will Generate more frictional heat, accelerate the aging of rubber parts, make them lose their elasticity prematurely, and reduce the radial holding force on the plunger. With the harsh fracturing environment, that is, the increase of well depth and the expansion of f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a surface textured fracturing pump plunger dynamic sealing system, which aims to improve the problems of rapid seal failure and serious wear of the traditional fracturing pump plunger dynamic seal friction pair

Another object of the present invention is to provide a performance testing method for the plunger dynamic sealing system, which aims to solve the problem that the sealing performance and friction performance of the fracturing pump are difficult to observe in real time during the movement process, and to design a method that can better complete the test A scheme for testing the internal performance parameters of the fracturing pump dynamic sealing system

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