Ultrahigh-pressure hydraulic device integrating drilling, reaming and cutting

Abstract

The invention discloses an ultrahigh-pressure hydraulic device integrating drilling, reaming and cutting. The ultrahigh-pressure hydraulic device comprises a drilling machine, a rotary water tail, a drill pipe, a rubber pipe, a drill bit, a water pump and a water tank, wherein the drill pipe is mounted on the drilling machine and driven to rotate by a rotating machine, and the drill bit is fixed at the front end of the drill pipe; the rubber pipe is connected to the rear end of the drill pipe through the rotary water tail; the water pump is connected between the water tank and the rubber pipe and is used for supplying water into the drill pipe and the drill bit through the rubber pipe. The ultrahigh-pressure hydraulic device integrating drilling, reaming and cutting has the advantages that low-pressure drilling, medium-pressure reaming and high-pressure seam cutting are combined, drilling, reaming and seam cutting are integrated, coal free face is increased, coal internal fracture is increased, sufficient pressure relief and permeability increasing of coal are achieved, gas release difficulty is improved, the effective influence range of drilling is increased, gas extraction rate is increased evidently, extraction drilling construction quantity is reduced greatly, and the device is simple to operate, high in efficiency, evident in application effect and worthy of popularization and application.

Description

technical field [0001] The invention relates to the technical field of coal seam pressure relief and anti-reflection after drilling along the bedding or through the bedding of the mine, in particular to an ultra-high pressure hydraulic drilling, expanding and cutting integrated device. Background technique [0002] At present, coal still occupies an important proportion in my country's energy structure, and the development of the national economy still has a large demand for coal. High gas and coal and gas outburst mines are facing pressure to increase production. With the continuous increase of mining depth, more and more mines are transformed into high-gas and outburst mines. As a basic measure to prevent outburst and control gas, drilling gas drainage is widely used in high-gas and outburst mines. Drilling and pre-drainage, the drainage rate is mostly lower than 30%. In order to meet the drainage standard, most mines have the problems of long pre-drainage time and large a...

AI Technical Summary

Problems solved by technology

Hydraulic reaming and high-pressure hydraulic slotting are widely used as pressure relief and anti-reflection measures, but the working pressure of existing hydraulic reaming and slotting devices is generally 30-50 MPa, which is not effective for hard coal seams with a firmness coefficient above 1.0. The anti-reflection means, and the existing equipment cannot realize the integrated function of drilling-reaming-slitting. Generally, the drilling construction needs to be completed, and the drill pipe is withdrawn to carry out reaming or slitting operations. The operation is cumbersome and the slitting increases. Poor transparent effect

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