Sucker rod centralizer hydraulic removal pliers

Abstract

The invention relates to a hydraulic disassembly clamp for a sucker rod centralizer. The hydraulic disassembly clamp for the sucker rod centralizer comprises a clamp body, a piston cavity and a plunger pump; pistons in the piston cavity comprises a small piston and a large piston, a pressure cavity is formed between the small piston and the clamp body, a first clamp claw and a second clamp claw are fixed to the tail ends of rod parts of the large piston and the small piston correspondingly, the first clamp claw is located on the front side of the second clamp claw, and a jaw is formed by the first clamp claw and the second clamp claw; an axial interval exists between the large piston and the small piston, a reset spring is arranged between the large piston and the clamp body, and a communicating channel is formed in the clamp body; and a back-up clamp seat is hinged to the clamp body, and a clamping groove is formed in the back-up clamp seat and provided with a groove wall allowing a sucker rod to slide in a guiding mode. Under the action of the clamping groove of the back-up clamp seat, the sucker rod rotates around a rotating shaft of the back-up clamp seat while sliding along the groove wall of the clamping groove, torque is applied between the sucker rod and the centralizer to disassemble the centralizer, the labor intensity of workers is reduced, the work efficiency is improved, and the operation cycle is shortened.

Description

technical field [0001] The invention relates to a hydraulic dismounting tong for a sucker rod centralizer. Background technique [0002] When the oil well is pumped, affected by the structure of the wellbore, the combination of the pipe string, the production parameters, and the viscosity of the crude oil, the sucker rod will be eccentrically worn. The performance is reduced, which intensifies the eccentric wear of the sucker rod. In order to prevent the occurrence of eccentric wear, a centralizer is often installed on the sucker rod. Existing centralizers include two types: socket type and collar type. The socket type centralizer consists of two split parts, which are fixed and sleeved on the sucker rod by inserting; the collar type centralizer is passed through The thread is screwed on the sucker rod. When the oil pumping operation is carried out to a certain stage, the oil well needs to be repaired. At this time, the centralizer needs to be disassembled. The staff usual...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydraulic dismantling pliers for sucker rod centralizers, so as to solve the problems in the prior art that the disassembly of coupling centralizers is operated by workers through pipe wrench, low efficiency, high labor intensity and long working cycle

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