High-torque hydraulic pipe-wrenching machine for wrenching and disassembling outer-flat drilling rod

Abstract

The invention relates to high-torque hydraulic wrenching and disassembling equipment suitable for an outer-flat drilling rod, belonging to the field of drilling and exploring machineries. The high-torque hydraulic pipe-wrenching machine for wrenching and disassembling the outer-flat drilling rod is characterized by comprising lower clamping tongs, a floating device, clasp punching tongs, an orifice leaving oil cylinder, a sliding block at the lower end part of a left floating post and a sliding block at the lower end part of the right floating post of the floating device respectively correspond to the insides of a left chute and a right chute of a lower clamping tongs support of the lower clamping tongs, the body of the orifice leaving oil cylinder is fixed at the rear end part of the lower clamping tongs support, and a piston rod of the orifice leaving oil cylinder is articulated with a floating frame; and the clasp punching tongs are arranged on a floating plate of the floating device, and clasp turning tongs are arranged on a bottom plate of the clasp punching tongs. The invention adopts an integral structure of clamping, clasp turning, clasp punching/pre-tightening and is suitable for the wrenching and the disassembling of the outer-flat drilling rod.

Description

technical field [0001] The invention relates to a high-torque hydraulic unscrewing device suitable for an outer flat drill pipe, which belongs to the field of drilling machinery. Background technique [0002] Most of the pipe twisters in drilling engineering are only suitable for drill pipes with cuts. The clamping part usually uses pad forks, and the unscrewing part uses free pliers. Rotation, so as to realize the unscrewing and unloading of the drill pipe, the control part generally adopts mechanical operation and hydraulic operation. [0003] The deficiencies of the existing pipe wringer: [0004] 1. Most of the existing pipe twisters are suitable for unscrewing and unloading drill pipes with cuts. The cuts will greatly reduce the strength of the drill pipes, thereby affecting the drilling construction process. However, the pipe twisters suitable for unscrewing outer flat drill pipes are still unavailable. No. [0005] 2. Most of the existing pipe twisting machines are...

AI Technical Summary

Problems solved by technology

[0004] 1. Most of the existing pipe twisters are suitable for unscrewing and unloading drill pipes with cuts. The cuts will greatly reduce the strength of the drill pipes, thereby affecting the drilling construction process. However, the pipe twisters suitable for unscrewing outer flat drill pipes are still unavailable. No

[0005] 2. Most of the existing pipe twisting machines are suitable for unscrewing drill pipes in the case of medium and shallow holes or small torque. Equipment life has a big impact

[0006] 3. The existing pipe twisting machine does not solve the axial floating problem in the process of unscrewing and unloading the drill pipe well, which results in aggravated wear of the drill pipe thread

[0007] 4. The existing pipe twisting machine has no automatic centering function

When the upper and lower drill pipes are docked, if the centers of the two drill pipes are not in a straight line, it is easy to screw up and damage the threads during the docking, thus shortening the service life of the drill pipes

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