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A kind of unidirectional bending drilling tool and punching method for hole making and coal removal

A bending and one-way technology, which is applied in the field of one-way bending drilling tools and punching holes to create holes, can solve the problems of small range of water conservancy injection and limited range of single-hole pressure relief, and achieve the purpose of increasing the range of single-hole pressure relief, The effect of reducing engineering quantity and increasing coal output

Active Publication Date: 2022-06-24
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a one-way bending drilling tool and a punching hole-making method for coal removal, which solves the problems of the existing hydraulic punching tools with a small range of water conservancy spraying and a limited range of single-hole pressure relief. The problem

Method used

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  • A kind of unidirectional bending drilling tool and punching method for hole making and coal removal
  • A kind of unidirectional bending drilling tool and punching method for hole making and coal removal
  • A kind of unidirectional bending drilling tool and punching method for hole making and coal removal

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Experimental program
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Embodiment 1

[0050] The present embodiment discloses a one-way curved drilling tool, which is formed by connecting a plurality of short sections in sequence. like figure 1 As shown, each short joint at least includes a seat section 1, a movable member 2, a push block 3 and an elastic member 4. The seat section 1 is provided with a central channel 11 for liquid flow, as a pressure injection channel, the movable member 2, the push block 3 and the elastic member 4 are arranged in the central channel 11 .

[0051] The movable part 2 is an annular part as a whole, and the channel 23 in the annular part is used for the injection liquid to pass through. Figure 10 shown.

[0052] The inner wall of the seat section 1 includes a spherical groove section 12 and a variable section section 13, such as image 3 As shown, the spherical groove section 12 matches the spherical surface of the movable ball head section 21; the variable section section 13 includes an equal section section and an inclined...

Embodiment 2

[0065] The present embodiment provides a method for punching and digging coal. The method uses the one-way curved drilling tool described in Embodiment 1 to punch and dig coal along the main hole direction. The process is as follows: Figure 14 shown, including the following steps:

[0066] Step 1, constructing the main hole 9. In this embodiment, conventional drilling tools (such as rock drilling tools, etc.) are used to drill to form the main hole 9. After seeing the coal seam 10, the drilling tool is proposed; The one-way bending drill tool of Example 1;

[0067] Step 2, when the head of the one-way bending drilling tool contacts the bottom of the main hole, start the mud pump to inject pressure into the central channel 11, and push the block 3 to apply a thrust to the movable part 2 under the action of hydraulic force, and the movable part 2 pushes toward a Lateral bending, and finally the whole one-way bending drilling tool is one-way bending, and then applying WOB, the ...

Embodiment 3

[0070] The extraction area given in this example is 12m×12m, the rock hole section is 50m, and the coal thickness is 3m. Taking domestic conventional cross-layer hole extraction as an example, the hole spacing is 3m × 3m, 16 holes need to be arranged, the total footage of rock hole section is 800m, and the footage of coal hole section is 48m. By adopting the invention to carry out 8 branches of punching and digging coal in each through-layer hole, only 4 holes are required, the total footage of the rock hole section is 200m, and the total footage of the coal hole section is 144m, which greatly reduces the amount of engineering and saves drilling tools. , which reduces the difficulty of work. The engineering quantity analysis of the two schemes is shown in Table 1.

[0071] Table 1 The present invention and conventional technology engineering quantity comparison table

[0072]

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Abstract

The invention relates to a unidirectional bending drilling tool and a method for punching holes to make holes and extract coal. The drilling tool includes a plurality of sequentially connected short sections; Channel, the central channel is equipped with movable parts, push blocks and elastic parts; the movable part is a ring part as a whole, and the movable part includes a movable ball head section and a cylinder section; the inner wall of the seat section includes a spherical groove section and a variable section section, and the spherical groove section Matching with the spherical surface of the movable ball head section, the variable section section is provided with an inclined surface along its circumference, and a gradual gap is formed between the inclined surface and the outer wall of the cylinder section; the inner wall of the seat section is provided with a push block along the The orifice moves back and forth in the radial direction, and the inner wall of the seat section is provided with a communication hole connecting the pressure chamber and the central channel. The drilling tool of the present invention can realize one-way bending; adopting the drilling tool of the present invention can carry out radial coal mining of the perforated hole, increase the coal output of the single hole of the perforated hole, increase the pressure relief range of the single hole, and improve the drainage Benefits, reduce the amount of piercing holes.

Description

technical field [0001] The invention belongs to the technical field of underground gas extraction in coal mines, and particularly relates to a one-way curved drilling tool and a method for punching and drilling holes for coal. Background technique [0002] The implementation of gas pre-drainage in underground drilling is the fundamental method of mine gas control in my country at present. The gas drainage technology of through-hole drilling based on bottom-draining roadway is one of the main methods for gas drainage in high gas and low permeability outburst coal seams. The hydraulic punching technology based on drilling through layers can effectively reduce the cost of gas drainage, improve the drainage efficiency, and ensure the safe production of the working face. It has been widely used in soft and low permeability coal seam development areas. At present, conventional drilling tools combined with hydraulic punching tools are mainly used to punch holes in the coal seam sect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/05E21B7/04
CPCE21B17/05E21B7/04
Inventor 庞涛姜在炳李浩哲杜天林许耀波李江杨建超赵龙
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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