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Underground coal mine auto-drilling apparatus and method

A technology of drilling device and drilling method, applied in safety devices, mining equipment, earth-moving drilling, etc., can solve the problems of hole collapse, stuck drill, top drilling, etc. Safe, wide-ranging effects

Inactive Publication Date: 2017-05-24
泰尔达能源科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an automatic drilling device and method for underground coal mines to solve the problems of accidents such as hole collapse / top drilling / drill sticking when drilling in soft coal seams

Method used

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  • Underground coal mine auto-drilling apparatus and method

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Embodiment Construction

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0034] Such as figure 1 As shown, the present invention proposes a coal mine underground automatic drilling device, which is installed in the underground tunnel 20 of the coal mine, for example, used for horizontal drilling, or drilling with a large inclination angle, to extract gas and improve the efficiency of gas extraction. The coal mine automatic drilling device includes:

[0035] The pressurized pump truck 1, that is, the high-pressure pump truck, pressurizes the liquid (water) input into the coiled pipe; The rated power of pump truck 1 can be 250KW;

[0036] The coiled tube 2 is a metal tube, and the coiled tube has an inlet and an outlet. The inlet of the coiled tube is connected to the pressurized pump truck 1; the outlet of the coiled tube is used to exten...

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Abstract

The invention provides an underground coal mine auto-drilling apparatus and method; the underground coal mine auto-drilling apparatus comprises: a pressure pump truck; a coiled tubing having an inlet and an outlet, with the inlet of the coiled tubing connected to the pressure pump truck and the outlet of the coiled tubing extending into a raw coal working support face; a tubing rotator connected to the coiled tubing; a protective tube sleeving the coiled tubing, abutted to the raw coal working support face and connected downstream of the tubing rotator, wherein the protective tube is a cross tube, and the protective tube has an axial passage for conveying the coiled tubing and a side passage for returning pulverized coal; a rotary nozzle connected to the outlet of the coiled tubing; a pulverized coal returning line connected to the side passage of the protective tube; a gas return recycling and detection device connected to the pulverized coal return line. The underground coal mine auto-drilling method employs the underground coal mine auto-drilling apparatus. The underground coal mine auto-drilling apparatus and method provide improved gas drainage efficiency and reduced cost and ensure safety.

Description

technical field [0001] The invention relates to the field of underground automatic drilling in coal mines, in particular to an automatic underground drilling device and method for coal mines, especially for drilling in soft coal seams where accidents such as hole collapse / top drilling / drill sticking are prone to occur during drilling construction. Background technique [0002] Some coal mine gas has the characteristics of "three lows" of low pressure, low permeability and low saturation, which brings great difficulties to coal mining and gas utilization. Among them, soft coal seams widely exist, which further increases the difficulty of mining and utilization. At present, underground gas extraction mostly adopts the method of negative pressure extraction after mechanical drilling with coal mine drilling rigs. In soft coal seams, accidents such as hole collapse / top drilling / drill sticking are prone to occur during drilling construction, resulting in increased costs and low ex...

Claims

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Application Information

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IPC IPC(8): E21B7/18E21F7/00
CPCE21B7/18E21F7/00
Inventor 张少伟胡鹏左科峰周安滨李广安志伟
Owner 泰尔达能源科技(北京)有限公司
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