A fixed-point protection hole anti-collapse device for drainage drilling

A drainage drilling and hole protection technology, which is applied in the direction of drilling driving devices, safety devices, mining equipment, etc. in the borehole, can solve the problems of difficult maintenance of the gas drainage system, collapse and sealing of gas drainage holes, etc., and achieve High efficiency of gas drainage, prevention of borehole collapse, and improvement of work efficiency

Inactive Publication Date: 2019-12-10
贵州安晟能源有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fixed-point protective hole anti-collapse device for drainage drilling to solve the problems that the gas drainage holes are prone to collapse and blockage and the maintenance of the gas drainage system is difficult.

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  • A fixed-point protection hole anti-collapse device for drainage drilling
  • A fixed-point protection hole anti-collapse device for drainage drilling
  • A fixed-point protection hole anti-collapse device for drainage drilling

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] see Figure 1-6 , the present invention provides a technical solution: a fixed-point protection hole anti-collapse device for drainage drilling, including a porous casing 1, a barb 2-1, an end pipe collar 2-2, a retaining ring arm 2-3, a retaining ring 2-4, elastic sheet 3-1, anchor claw 3-2, tendon 3-3, top pipe hoop 3-4, quarter pipe 4, grid block 4-1, steel wire 5, beam ring 6, limit block 9. External thread 10, scale line 11, fastenin...

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Abstract

The invention discloses a gas-extraction-drilling fixed-point hole-protection anti-sloughing device. According to the gas-extraction-drilling fixed-point hole-protection anti-sloughing device, a gas-extraction-drilling coal seam section or a rock stratum mellow section can be accurately and effectively protected, the gas extraction effect is improved, and meanwhile a designed sleeve fixing devicecan be suitable for extraction holes with various inclination angles. A method includes the specific steps that after drilling construction is completed, a sleeve with the specified length is fed intoa gas extraction hole, a four-in-charge pipe is connected with the tail end of the sleeve, and the sleeve is pushed to the specified position; for upper drilling, barbs at the tail end of the sleeveare used for fixing the sleeve, for lower drilling, anchor jaws can be arranged at the top end of the sleeve, and after the sleeve is fed to the specified position, the anchor jaws are released for fixing the sleeve. According to the extraction-drilling fixed-point hole-protection anti-sloughing device, it is achieved that drilling weak hole wall section is accurately protected in a fixed-point mode, and the protected hole quality is guaranteed; meanwhile, the cost is saved, workloads of workers are reduced, and the gas extraction effect is improved; the extraction-drilling fixed-point hole-protection anti-sloughing device has the advantages of being low in labor intensity and cost, safe, reliable and the like.

Description

technical field [0001] The invention relates to a hole protection device for coal mine drilling, in particular to a fixed-point protection hole anti-collapse device for extraction drilling. Background technique [0002] Drilling gas extraction has become a major method for pressure relief and release of coal mine gas. For coal seams with complex occurrence conditions, such as soft coal seams, the gas drainage holes are prone to collapse and blockage, and the maintenance of the gas drainage system is difficult. The current method of preventing and controlling the collapse of coal seam gas drainage holes is mainly to use protective casings and large-pore filling materials to fill the drainage holes. However, there are still no reasonable and effective fixed-point hole protection methods and devices in the current work site. Not only the cost is high, the operation time is long, time-consuming and laborious, the efficiency is low, and the protection holes are redundant, but als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00E21B4/04
CPCE21B4/04E21F7/00
Inventor 陈功华翟文杰田波周栓柱孙振炎孙本权
Owner 贵州安晟能源有限公司
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