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Hydraulic power and fracturing combined resonant gas extraction method for coal bed and hole packer

A technology for hydraulic fracturing and gas drainage, which is applied in the field of coal seam hydraulic fracturing combined with resonance gas drainage method and hole sealing device, can solve problems such as insufficient gas drainage efficiency, and achieves improved regional fracture-making effect and huge economic benefits. and social benefits, and the effect of improving the degree of fissure development

Active Publication Date: 2020-05-05
SHENHUA XINJIANG ENERGY +1
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  • Abstract
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Problems solved by technology

[0008] Based on this, it is necessary to provide a coal seam hydraulic fracturing combined resonance drainage gas method and a hole sealing device for the technical problem of insufficient gas drainage efficiency in the existing technology

Method used

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  • Hydraulic power and fracturing combined resonant gas extraction method for coal bed and hole packer
  • Hydraulic power and fracturing combined resonant gas extraction method for coal bed and hole packer
  • Hydraulic power and fracturing combined resonant gas extraction method for coal bed and hole packer

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] Such as figure 1 Shown is a working flow chart of a coal seam hydraulic fracturing combined resonance drainage gas method of the present invention, including:

[0044] Step S101, arranging fracturing boreholes at preset positions on the excavation face, arranging drainage boreholes in multiple directions of the fracturing boreholes, and performing drilling operations on the fracturing boreholes;

[0045] Step S102, after the drilling operation of the fracturing borehole is completed, perform circumferential cutting on the fracturing borehole;

[0046] Step S103, using a fracturing drilling sealer to seal the fracturing drilling;

[0047] Step S104, after the hole sealing is completed, perform fracturing on the fracturing borehole, and perform pulsating water injection when the fractures are fully developed;

[0048] Step S10...

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Abstract

The invention discloses a hydraulic power and fracturing combined resonant gas extraction method for a coal bed and a hole packer. The method comprises steps as follows: a fracturing drilling hole isformed in the preset position of a tunneling face, drainage drilling holes are formed in multiple directions of the fracturing drilling hole, and drilling operation is performed on the fracturing drilling hole; after drilling operation of the fracturing drilling hole is completed, annular cutting is performed on the fracturing drilling hole; the fracturing drilling hole is sealed through a fracturing drilling hole packer; the fracturing drilling hole is fractured after hole packing, and pulsed water injection is performed after a fracture develops full; drilling operation of the drainage drilling holes is performed while fracturing and pulsed water injection are performed on the fracturing drilling hole; and after drilling operation of the drainage drilling hole is completed, the drainagedrilling hole is packed by a drainage drilling hole packer, gas is drained, and gas drainage work of the tunneling face is completed. Working procedure time of hole distribution, cutting, packing andfracturing of the fracturing drilling hole can be greatly shortened, regional disruption resonance is realized on the basis of pulsed fracturing, and the regional fracture development degree is improved.

Description

technical field [0001] The invention relates to the technical field related to coal mines, in particular to a coal seam hydraulic fracturing combined resonance drainage gas method and a hole sealing device. Background technique [0002] Coal mine gas is a heavy pressure disaster factor that affects mine safety production. At present, hydraulic fracturing technology is a relatively effective anti-permeability technology for coal seams, which can better control gas in working faces. However, for the excavation working face, fast and efficient gas drainage is required. Therefore, it is necessary to carry out an integrated improvement on the currently relatively cumbersome drilling, cutting, sealing, and fracturing processes to improve work efficiency. Moreover, the rapid expansion of fractures in the form of pulsating water injection fracturing during the fracturing process is a key technology that needs to be studied at present. [0003] The research on gas drainage in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B33/122E21F7/00E21F17/00
CPCE21B43/26E21B33/122E21F7/00E21F17/00
Inventor 陈建强王刚刘昆轮刘震范酒源刘旭东黄启铭刘志远
Owner SHENHUA XINJIANG ENERGY
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