A self-rotating jet self-advancing slot drill

Abstract

The invention discloses a self-rotation jet self-propelling slotting drill bit. The self-rotation jet self-propelling slotting drill bit comprises a rotation body and a rotary sprayer installed at thefront end of the rotation body, the rear end of the rotation body is movably installed in a fixing shell, a slotting control shell capable of moving on the outer portion of the rotation body sleevesthe rotation body, and slotting spray holes and a barrier clearance spray hole are formed in the rotary sprayer. The slotting spray holes are exposed or blocked through moving of the slotting controlshell; a fluid channel is formed in the fixing shell and the rotation body, the front end of the fluid channel is connected with the rotary sprayer, and the rear end of the fluid channel is connectedwith a connector; the fixing shell is provided with propelling spray holes communicated with the fluid channel. High-pressure liquid is provided by using a high-pressure pump, a continuous high-pressure pipe is used as an operation string, it is not required that a drilling tool is connected or removed, and operation is convenient and fast; power for barrier clearance, self-propelling and rotary slotting is provided through high-pressure water jet, slotting at any position is achieved, the whole process is simple in construction technology, operation is easy, the labor intensity is low, and the drill bit is economical and efficient.

Description

technical field [0001] The invention relates to the technical field of water jet slotting in boreholes, in particular to a self-rotating jet self-advancing slotting drill bit suitable for the field of underground gas drainage in coal mines. Background technique [0002] At present, when coal mines are pre-extracting gas, in order to improve the air permeability of coal reservoirs, high-pressure water jet technology is often used to highly concentrate the energy of high-pressure water jets to efficiently break and cut rock formations. [0003] In the prior art, a water jet slotting device for drilling is disclosed (Patent No. ZL201720916011.3), which uses a hydraulic tunnel drilling rig to output rotational torque and propulsion, and drives the slotting device to perform rotary cutting and feeding through the drill pipe, realizing The cutting and slagging of coal seams and rocks; the existing problems are as follows, (1) using the drilling rig to provide axial thrust, using t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-rotating jet self-advancing slotting drill bit, which is used to solve the problems existing in the prior art that the drilling tool needs to be connected and unloaded, the construction process is complicated, the efficiency is low, the slotting at any position cannot be realized, and the rotation speed is not easy to control and the problem of high energy consumption

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