A multi-cavity segmented downward gas drainage borehole drainage device and method

A gas extraction and drainage device technology, applied in gas drainage, drainage, safety devices, etc., can solve the problems of poor gas drainage, inability to achieve deep hole drainage, limited drainage depth, etc., to facilitate disassembly, assembly and repetition Utilize and avoid the effect of limited drainage depth and convenient drainage

Active Publication Date: 2021-02-26
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Around underground gas disasters, the current gas control policy of "draining first, then mining, monitoring and monitoring, and wind to determine production" is usually adopted; at present, coal seam gas drainage is implemented underground in coal and gas outburst and high gas mines, but the following During the construction of drilling holes for gas drainage, due to the hydraulic slag discharge process or the existence of aquifers, a large amount of water often accumulates in the holes, and the accumulated water in the holes blocks the gas migration channels, increases the drainage resistance, and causes gas Poor draw
As for the method of drilling water accumulation in downward gas drainage, compressed air drainage is usually adopted, but the drainage depth of this technology is limited, and deep hole drainage cannot be realized

Method used

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  • A multi-cavity segmented downward gas drainage borehole drainage device and method
  • A multi-cavity segmented downward gas drainage borehole drainage device and method
  • A multi-cavity segmented downward gas drainage borehole drainage device and method

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Embodiment 1

[0029] The specific structure of a multi-cavity segmented downward gas drainage drilling drainage device includes a plurality of segmented chambers 1 , gas injection pipes 2 , water guide pipes 3 and ball float valves 4 . A plurality of segmented chambers 1 divides the long downward drilling into multiple stages, and the distance of each stage is respectively used for gas injection and drainage, so that the injection pressure does not need to be very large to meet the requirements. The segmented chamber 1 includes a connecting pipe 13 and a segmented partition 14. Multiple segmented chambers 1 are connected in sequence, the water guide pipe 3 communicates with the adjacent segmented chambers 1, and the gas injection pipe 2 communicates with the segmented chambers 1 at the bottom of the hole. , A float valve 4 and a filter screen 5 are also provided in the sectioned chamber 1 at the bottom of the hole. The device is provided with a plurality of segmented chambers 1, which solve...

Embodiment 2

[0040]The specific structure of the multi-cavity segmented downward gas drainage drilling drainage device includes a plurality of segmented chambers 1 , gas injection pipes 2 , water guide pipes 3 and ball float valves 4 . Among them, the gas drainage boreholes are arranged downwards and drilled vertically or obliquely downwards. Multiple segmented chambers 1 divide the long downward drilling into multiple stages. The segmented chambers 1 include connecting pipes 13 and segmented partitions. Plate 14, a plurality of segmented chambers 1 are connected in sequence, so as to be put into the downhole gas drainage borehole, the water guide pipe 3 connects each adjacent segmented chamber 1, and the gas injection pipe connects 2 through the segmented cavity at the bottom of the hole The chamber 11 is also provided with a float valve 4 and a filter screen 5 in the sectioned chamber 11 at the bottom of the hole, which are used to control the water inflow in the device and prevent the de...

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Abstract

The invention provides a multi-cavity sectional type descending gas extracting, drilling and water draining device and method and relates to the technical field of gas extraction. The multi-cavity sectional type descending gas extracting, drilling and water draining device comprises a plurality of sectional type chambers, a gas filling pipe, a water guiding pipe and a float valve; the sectional type chambers comprise connecting pipes and sectional type partition boards and are sequentially connected; the water guiding pipe communicates adjacent sectional type chambers; the gas filling pipe communicates with a hole bottom sectional type chamber; the float valve and a filter net are arranged in the hole bottom sectional type chamber; when drilling and water drainage are carried out on gas, the device is put in a drilled hole; the hole bottom sectional type chamber is filled with water through the gas filling pipe to open the float valve; the accumulated water in the drilled hole enters the hole bottom sectional type chamber and an upper sectional type chamber through the filter net and the float valve; the hole bottom sectional type chamber is filled with gas through the gas fillingpipe to close the float valve; and gas is continuously filled, water in the sectional type chamber is drained upwards along the water guiding pipe section by section, and the operation is repeatedly carried out after the water is drained. The device and the method solve the water accumulation technical problem of extraction and drilling of descending gas and also have the advantage of being simpleand convenient in operation.

Description

technical field [0001] The invention relates to the technical field of gas drainage, in particular to a multi-cavity segmented drainage device applied to downhole gas drainage boreholes, and a method for using the device to drain gas drainage boreholes. Background technique [0002] Coal is an important mining resource. As the depth of coal seam mining increases, the pressure and content of coal seam gas gradually increase, and gas disasters become more and more serious, threatening the safe and efficient development of mines. At the same time, as a clean resource, gas is used after industrialization Extensively, the extraction of gas is conducive to the realization of high efficiency, energy saving and emission reduction. Around underground gas disasters, the current gas control policy of "draining first, then mining, monitoring and monitoring, and wind to determine production" is usually adopted; at present, coal seam gas drainage is implemented underground in coal and gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00E21F16/00
CPCE21F7/00E21F16/00
Inventor 刘震李娆娆杨赫赵大伟朱丹亮王文迪张铭芮
Owner SHANDONG UNIV OF SCI & TECH
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