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Multi-stage slag discharge air screw motor for underground drilling in coal mine

A screw motor and motor technology, used in the fields of mine drilling, coal mine drilling, and oil drilling, can solve problems such as unfavorable slag discharge, and achieve the effects of improving the slag discharge effect, avoiding deposition, and increasing the drilling rate.

Active Publication Date: 2019-03-05
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For soft coal seams, the slagging problem must be considered when using the air drilling process to ensure the smoothness of the hole. However, the external flat structure of the general screw motor is similar to the drilling construction of the external flat drill pipe during the drilling process, which is very uncomfortable. Good for slagging

Method used

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  • Multi-stage slag discharge air screw motor for underground drilling in coal mine
  • Multi-stage slag discharge air screw motor for underground drilling in coal mine
  • Multi-stage slag discharge air screw motor for underground drilling in coal mine

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Embodiment Construction

[0027] see figure 1 , 1A , 1B and 2 show the multi-stage slagging air screw motor for coal mine underground drilling of the present invention.

[0028] The multi-stage slagging air screw motor for coal mine underground drilling includes a joint 1, a motor assembly 2, a cardan shaft assembly 6 and a transmission shaft assembly 8, and the two ends of the motor assembly are respectively connected to the joint 1 and the The cardan shaft assembly 6 , the transmission shaft assembly 8 is arranged at the other end of the cardan shaft assembly 6 .

[0029] Among them, see figure 2 , the motor assembly 2 is composed of a motor rotor 11, a motor stator 12 and a stator outer tube 13, the inside of the stator outer tube 13 is hollow, and the motor rotor 11 and the motor stator 12 are both arranged on the stator outer tube In the body 13, the rear end of the motor rotor 11 can be connected with the joint 1 through a screw, and the front end of the motor rotor 11 can be connected with t...

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Abstract

A multi-stage slagging air screw motor for underground drilling in coal mines. The shaft assembly transmits power. The single-bent outer tube of the cardan shaft assembly can realize directional drilling. The motor assembly is provided with a continuous right-handed spiral groove. When the screw motor rotates, it can agitate the deposited drilling slag, which is effective. It helps the air to discharge the drill cuttings out of the hole; two sets of reverse bypass holes are added to realize multi-stage slag discharge, ensuring that the motor still rotates normally to discharge powder when the drill bit at the bottom of the hole is blocked or the drill slag is accumulated; a one-way valve is installed to avoid high-pressure gas Carrying drilling slag into the motor in the opposite direction will cause damage to the motor. The present invention is used in combination with the downhole measurement while drilling system for drilling long holes in the broken soft coal seam in coal mines, which can improve the effect of slag discharge, reduce the resistance in the hole, and ensure the construction Safety, improve the drilling depth and coal seam drilling rate of underground soft coal seams in coal mines.

Description

technical field [0001] The invention relates to the technical fields of mine drilling, oil drilling and coal mine drilling, in particular to a coal mine underground drilling multi-stage drill used in conjunction with a coal mine underground measurement while drilling system for long drilling construction along broken soft coal seams. Slag air screw motor. Background technique [0002] Drilling holes for gas drainage in soft and broken coal seams are prone to hole collapse and drill sticking, which makes it difficult to form holes; while rotary drilling is used, it is difficult to control the drilling trajectory, and it is easy to drill to the top (bottom) of the coal seam. Rock, it is difficult to implement long drilling in the coal seam, resulting in uneven gas drainage, blind areas of drainage, and potential safety hazards. Therefore, at present, the key problem in the drilling construction of gas drainage in soft and broken coal seams is the problem of hole formation bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/02E21B7/04E21B21/16
CPCE21B4/02E21B7/04E21B21/16
Inventor 张杰王毅黄寒静牛素杰宋海涛侯红金新王力徐保龙
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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