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Coal seam reticulated gas extraction drilling construction method of water jet drilling machine

A technology of gas drainage and construction method, which is applied in earth-moving drilling, drilling with liquid/gas jet, directional drilling, etc., can solve the problems such as the inability to realize the construction method of coal seam mesh gas drainage and the lack of water jet drilling rigs, etc.

Pending Publication Date: 2020-10-23
CCTEG SHENYANG RES INST
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is a lack of correspondingly oriented water jet drilling rigs, and the coal seam mesh gas drainage drilling method cannot be realized.

Method used

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  • Coal seam reticulated gas extraction drilling construction method of water jet drilling machine
  • Coal seam reticulated gas extraction drilling construction method of water jet drilling machine
  • Coal seam reticulated gas extraction drilling construction method of water jet drilling machine

Examples

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Effect test

no. 1 example

[0026] see figure 1 , figure 2 , image 3 , Figure 5 , Figure 6 A coal seam mesh gas drainage drilling method for a water jet drilling rig, comprising drilling a number of (diameter greater than 150 mm) water jet construction drilling 22 in a coal seam 100, characterized in that: ① Utilizing a water jet drilling rig, The outer drill pipe 4 with the flexible drill pipe rotator 7 is inserted into the bottom of the water jet construction drill hole 22 in the coal seam 100, and the outer drill pipe 4 is fixed on the main body 1 of the drilling rig with the outer drill pipe holder 3 of the drilling rig. The drill pipe holder 2 fixes the inner drill pipe 10 on the main body 1 of the drilling rig, so that the water jet nozzle 12 enters the flexible drill pipe rotator 7, and ② uses the 360° orientation mark fixed on the outer drill pipe holder 3 of the drilling rig Plate 5, push and pull the handle 404 to adjust the angle, make the water drop level 409 in a horizontal state, ti...

no. 2 example

[0032] see figure 1 , Figure 4 , Figure 5 , Figure 6 A coal seam mesh gas drainage drilling method for a water jet drilling rig, comprising drilling a number of (diameter greater than 150 mm) water jet construction drilling 22 in a coal seam 100, characterized in that: ① Utilizing a water jet drilling rig, The outer drill pipe 4 with the flexible drill pipe rotator 7 is inserted into the bottom of the water jet construction drill hole 22 in the coal seam 100, and the outer drill pipe 4 is fixed on the main body 1 of the drilling rig with the outer drill pipe holder 3 of the drilling rig. The drill pipe holder 2 fixes the inner drill pipe 10 on the main body 1 of the drilling rig, so that the water jet nozzle 12 enters the flexible drill pipe rotator 7, and ② uses the 360° orientation mark fixed on the outer drill pipe holder 3 of the drilling rig Plate 5, push and pull the handle 404 to adjust the angle, make the water drop level 409 in a horizontal state, tighten the ti...

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Abstract

The invention relates to a coal seam reticulated gas extraction drilling construction method of a water jet drilling machine. The coal seam reticulated gas extraction drilling construction method comprises the step of drilling a plurality of water jet construction drilling holes in a coal seam, and is characterized in that the water jet drilling machine with a 360-degree direction identification plate is utilized, an outer drill rod is mainly rotated, so that the direction identification position of a water jet nozzle is aligned with the position of another adjacent water jet construction drilling hole of the water jet construction drilling hole to which the angle of a dial corresponds; the water jet drilling machine is started, so that an inner drill rod drills by L<drill> meters to formanother water jet drilling hole in the direction from the water jet construction drilling hole to the adjacent water jet construction drilling hole; and all water jet drilling holes in the direction from all the water jet construction drilling holes to all the adjacent water jet construction drilling holes are repeatedly completed. The reticulated through gas extraction drilling holes can be constructed directionally according to the needs; the gas extraction range of the extraction drilling holes is expanded; the pressure relief area is enlarged; and the coal seam reticulated gas extraction drilling construction method is particularly suitable for gas extraction in hard coal seams with low permeability such as anthracite coal seam gas extraction, and effectively improves the gas drainageeffect of the coal seam.

Description

technical field [0001] The invention relates to a water-jet drilling rig and a construction method of the water-jet drilling, in particular to a coal seam mesh gas drainage drilling construction method of the water-jet drilling rig. Background technique [0002] Improving the gas drainage effect of low-permeability coal seams has always been an important direction and topic in the field of coal mine safety. Traditional underground hydraulic punching, hydraulic cavitation, and hydraulic loosening are affected by submerged jets, etc., and the scope of pressure relief is not large. , the effect cannot meet the requirements, and hydraulic fracturing cannot form effective fracturing to improve the gas permeability of the coal seam, and the effect is not ideal. The ultra-short-radius radial rotation technology of underground coal mine drilling can drill a gas circulation channel (drilling hole) with a length of 20-50 meters within the range of the coal seam the drill passes throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B7/18E21B43/26E21B7/04
CPCE21B43/006E21B7/18E21B43/26E21B7/04
Inventor 曹垚林仇海生都锋王宇鹍梁博韩晓极王魁军王贝张洪祯倪兴
Owner CCTEG SHENYANG RES INST
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