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Conventional drill hole injection molding track positioning and measuring method under coal mine

A technology of trajectory positioning and measuring method, which is applied in the directions of surveying, earth-moving drilling, wellbore/well components, etc., can solve the problems of high cost of positioning the drill bit, high requirements on experimental conditions, complicated operation, etc., and achieves wide practicability, measurement Intuitive, accurate and easy-to-use effects

Inactive Publication Date: 2019-04-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The location-while-drilling method needs to be used with large-scale special instruments and equipment, and the measurement results are relatively accurate, but it requires high experimental conditions and the cost of positioning the drill bit is expensive
The segmented drilling positioning method needs to install a section of drill pipe at a certain distance during the measurement process and stop recording the measurement, which is cumbersome to operate

Method used

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  • Conventional drill hole injection molding track positioning and measuring method under coal mine
  • Conventional drill hole injection molding track positioning and measuring method under coal mine

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Experimental program
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing:

[0016] The injection molding trajectory positioning test system for underground conventional drilling in coal mines of the present invention is composed of an injection molding extruder (2), a TPE material raw material (3), a hose mold (4) and a high-pressure pump (5).

[0017] The method for positioning and testing the trajectory of conventional drilling injection molding in underground coal mines of the present invention has the following specific steps:

[0018] a. After withdrawing the extraction drill pipe, clean the inside of the borehole (1) to prevent debris from clogging the borehole;

[0019] b. Slowly insert the closed end of the hose mold (4) into the borehole (1) until it reaches the bottom of the borehole (1);

[0020] c. Connect the high-pressure pump (5) to the injection molding machine (2) through the hose (4), turn on the power supply, and preheat the inj...

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Abstract

The invention relates to a conventional drill hole injection molding track positioning and measuring method under a coal mine, which is applicable to the measurement of a conventional extraction drillhole track under the coal mine. An experiment system device comprises an injection molding extrusion machine, a thermoplastic elastomer (TPE) material raw material, a hose pipe mould and a high-pressure pump; the injection molding extrusion machine is used for heating the TPE material raw material; the hose pipe mould is placed in an extraction drill hole so as to be used for molding the TPE material; and the high-pressure pump is used for pressurizing a injection molding extrusion process. By using the conventional drill hole injection molding track positioning and measuring method under thecoal mine involved in the invention, the conventional drill hole track under the coal mine can be measured and described, so that a track measuring step is simplified, and the track measuring efficiency is improved.

Description

technical field [0001] The invention relates to a method for positioning and measuring injection trajectory of conventional boreholes in coal mines, which is suitable for depicting and measuring the spatial trajectory of drainage boreholes in complex geological environments of coal mines. Background technique [0002] In coal mine production, coal and gas outbursts seriously plague the safety of coal mine production and the life safety of underground workers. In order to prevent gas disasters and accidents and improve the safety factor of underground operations, relevant regulations in my country require high-gas mines and gas outburst mines to carry out gas control. Drilling coal seam gas is the main technical measure to prevent coal and gas outburst and carry out gas control. one. However, in the actual drilling construction process, due to the influence of natural conditions, technical means and human factors, the actual drilling trajectory will deviate from the design tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/022
CPCE21B47/022
Inventor 解北京杨宇董春阳
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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