Downhole pipe column cutting tool

Abstract

The invention discloses a downhole pipe column cutting tool. The tool is composed of an anchoring electric cylinder, an anchoring mechanism, a push broach electric cylinder, a tool shell, a motor shell, a hollow shaft underground motor, a multi-stage planet wheel speed reducer, a cutting head rotating support, a cutter rotating transmission gear shaft, a spiral spline shaft, a cutter gear shaft frame, a transmission gear shaft, a guide cone, a milling disc, a cutter gear shaft, a cutter gear shaft suspension, a cutting head shell, a sawtooth-shaped push block. a cutter rotation transmission hollow gear shaft, a cutter revolution transmission hollow shaft and a motor transmission wheel. The low-speed end of the motor drives the whole cutting head to revolve at a low speed through the multi-stage planetary reducer, and the high-speed end of the motor drives the transmission gear shaft and the cutter gear shaft to rotate at a high speed so as to drive the cutter to rotate at a high speed. The push broach electric cylinder pushes the sawtooth-shaped sliding block to drive the spiral spline shaft so that the cutter can complete feeding motion. The underground pipe column can be continuously cut, no pollution is caused to the well bottom, and the efficiency of pipe column cutting operation is greatly improved.

Description

technical field [0001] The invention relates to a tool for cutting downhole pipelines, which belongs to the technical field of mechanical engineering or oil and gas engineering. Background technique [0002] During the workover process, accidents such as tubing and casing string sticking may occur. Traditional oil wells are usually unstuck by lifting the string. The column is cut off to unclog. [0003] At present, the commonly used methods for cutting downhole pipe strings include mechanical cutting, concentrated energy cutting, and chemical cutting. Energy-concentrating cutting uses special explosives to spray high-energy metal powder to cut the pipe string. The uneven cutting of the pipe string cut in this way is not conducive to subsequent recovery work and will pollute the environment. Chemical cutting is to ignite the explosive package mixed with mixed chemical agent and catalyst with electric current to expand the chemical substance around, so as to corrode the pipe...

AI Technical Summary

Problems solved by technology

Energy-concentrated cutting uses special explosives to spray high-energy metal powder to cut the pipe string. The uneven cutting of the pipe string cut in this way is not conducive to subsequent recovery work and will pollute the environment.

Chemical cutting is to ignite the explosive package mixed with mixed chemical agents and catalysts with an electric current to expand the chemical substances around, thereby corroding the pipe string to achieve the purpose of cutting. Very toxic and will pollute the environment

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