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Waterpower hole packer

A hole sealer and hydraulic technology, applied in the direction of sealing/isolation, safety devices, dust prevention, etc., can solve the problems of small hole sealing pressure and inability to seal rock holes, and achieve the effect of reliable hole sealing conditions

Inactive Publication Date: 2011-08-17
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that in the prior art, although there are many types of hole sealers, none of the hole sealers can achieve high-pressure rock hole sealing, but directly act on the coal body to seal the coal wall, so the risk of gas outburst Still relatively strong, and the sealing pressure is relatively small

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Embodiment Construction

[0012] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] The hydraulic hole sealer of the present invention includes a front sealer, one or more intermediate sealers, and a rear sealer, the rear end of the front sealer is connected in series with the front end of the middle sealer, and the rear sealer The front end is connected in series with the rear end of the middle hole sealer; wherein, the front hole sealer, the middle hole sealer and the rear hole sealer have the same structure.

[0014] figure 1 It is a schematic diagram of the axial cross-section structure of each hole sealer constituting the hydraulic hole sealer of the present invention. Such as figure 1 As shown, the front sealer, the middle sealer and the rear sealer all include: an expansion capsule 3, a central tube 4, an...

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Abstract

The invention provides a waterpower hole packer. The waterpower hole packer comprises a front hole packer, one or more middle hole packers and a rear hole packer; the rear end of the front hole packer is connected in series with the front end of the middle hole packer; the front end of the rear hole packer is connected in series with the rear end of the middle hole packer; and the front hole packer, the middle hole packer and the rear hole packer have the same structure and comprise expansion capsules and central pipes. By the waterpower hole packer, high-pressure hole packing of rock holes can be realized; the waterpower hole packer has the characteristics of no axial force, high hole-packing pressure, large friction force, high safety and simple structure, and can be widely applied to mining industries such as the coal mine and the like.

Description

technical field [0001] The invention relates to hole sealing technology, in particular to a hydraulic hole sealing device. Background technique [0002] With the increase of coal mining depth, gas disasters have become increasingly prominent. At present, gas disaster has become a serious natural disaster in coal mines. Gas drainage is one of the most effective measures to control gas disasters. However, due to the increase in buried depth and high ground stress, the gas permeability of coal seams is very low, and the drainage effect is often unsatisfactory. Hydraulic fracturing technology is currently widely used The pressure relief and permeability enhancement technology of coal mines, the basic principle of downhole fracturing is to inject high pressure fracturing fluid into the original and post-fracturing cracks in the coal (or rock) mass to overcome the minimum principal stress and the fracture pressure of the coal and rock mass, Widen, stretch and communicate these c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/02E21B33/03
Inventor 朱建安郭培红刘明举刘彦伟李海霞郭瑜
Owner HENAN POLYTECHNIC UNIV
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