High-pressure oriented perforating permeability-increasing method and device

A directional perforation and high-pressure water jet technology, which is applied in mining equipment, earth-moving drilling, gas discharge, etc., can solve the problems of difficult gas extraction, roof collapse, gas accumulation, etc., and achieve low drilling density, avoid collapse, drilling The effect of low pore density

Inactive Publication Date: 2018-12-07
HENAN POLYTECHNIC UNIV
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Problems solved by technology

Moreover, most of the anti-reflection parts are disc or conical, and the anti-reflection area with a diameter of several meters is prone to collapse of the roof and the consequences of being unable to support
And once a part collapses, the collapsed part will easily form cavities, and gas accumulation will occur in these cavities. The gas in the cavities is not only difficult to extract, but the accumulated gas is more likely to cause safety hazards to production

Method used

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  • High-pressure oriented perforating permeability-increasing method and device
  • High-pressure oriented perforating permeability-increasing method and device

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Embodiment Construction

[0029] The present invention will be further described below with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0030] like figure 1 As shown, a high-pressure directional perforating and anti-reflection equipment includes a high-pressure hydraulic pump 1, a high-pressure rubber hose 2, a high-pressure rotary joint 3, a drilling rig 4, and a high-pressure water jet drill pipe 5. A high-pressure water jet nozzle 6 is installed on the high-pressure water jet drill pipe 5; The lower end of the high-pressure water jet drill pipe 5 is provided with a mark 10 corresponding to the angular position of the high-pressure water jet nozzle 6 .

[0031] A high-pressure directional perforating antireflection method, comprising the following steps:

[0032] Step 1, use a drilling rig to drill four holes from the roadway to the coal seam;

[0033] Ste...

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Abstract

The invention discloses a high-pressure oriented perforating permeability-increasing method and device. The high-pressure oriented perforating permeability-increasing device comprises a high-pressurehydraulic pump, a high-pressure rubber tube, a high-pressure rotating joint, a drilling rig, a high-pressure water jet drilling rod and a high-pressure water jet nozzle. The high-pressure oriented perforating permeability-increasing method and device have the following beneficial effects that a coal seam is subjected to permeability increasing through the oriented perforating permeability-increasing method, a permeability-increasing part formed through the permeability-increasing method is actinoid, collapse of a coal seam roof can be avoided, and safety is improved; the permeability-increasing area is wide, the drilling density is low, and the permeability-increasing efficiency can be effectively improved; and the permeability-increasing method is simple and easy to operate, and the permeability-increasing device is simple and easy to transform.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and particularly relates to a high-pressure directional perforation and anti-reflection method and equipment. Background technique [0002] Among all kinds of coal mine disasters, gas disaster is the biggest disaster that threatens the safe production of coal mines in my country. The current fundamental solution for gas prevention and control is to carry out gas extraction, so as to reduce the gas content in coal seams and reduce gas gushing. However, most of the coal seams in our country have poor gas permeability, and the gas extraction rate by simply using ordinary drilling holes is low, which can no longer meet the needs of coal mines for safe and efficient production. become a key link in realizing the sustainable development of coal mines. [0003] In the prior art, the coal seam anti-reflection technology is usually used to improve the permeability of the coal seam, among which the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B43/114
CPCE21B43/006E21B43/114E21F7/00
Inventor 李辉张学增魏建平
Owner HENAN POLYTECHNIC UNIV
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