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Process for mounting gas pipelines of gas vertical shafts

A pipeline installation and gas pipe technology, which is applied in the direction of gas discharge, safety devices, wellbore/well components, etc., can solve the problems of low cost, filling problems after the lower port annulus seals the gas pipe wall, and reduces construction costs , The effect of shortening the construction period

Active Publication Date: 2015-12-16
BEIJING CHINA COAL MINE ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantages of the raising drilling rig sinking method: short construction period and low cost; the disadvantage is that when there is a large amount of water gushing out of the rock formation, the sealing of the annulus at the lower port and the backfilling of the gas pipe wall become major problems

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  • Process for mounting gas pipelines of gas vertical shafts
  • Process for mounting gas pipelines of gas vertical shafts
  • Process for mounting gas pipelines of gas vertical shafts

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Embodiment Construction

[0028] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0029] In this embodiment, the gas drainage well of Shihao Mine of Chongqing Songzao Coal and Electricity Company is taken as an example. The gas drainage shaft gas pipeline installation process of the gas drainage shaft includes the following steps:

[0030] (1) Gas shaft 14 is excavated. In this embodiment, the gas shaft 14 is constructed by raising the drilling rig, and the pilot hole is reamed into a gas shaft 14 with a diameter of 1.65m. 20m 3 / h, the hole bottom deviation is 0.54%. During the construction process,...

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Abstract

The invention discloses a process for mounting gas pipelines of gas vertical shafts. The process includes steps of (1), excavating the gas vertical shafts; (2), downwardly releasing gas pipes; (3), blocking the bottoms of annular spaces between the walls of the gas vertical shafts and the walls of the gas pipes. The process has the advantages that the construction periods of the gas vertical shafts can be shortened, the construction cost of the gas vertical shafts can be reduced, and conditions for effectively solving the problem of difficulty in filling the rears of the walls of existing gas vertical shafts can be created.

Description

technical field [0001] The invention relates to the field of drilling, and more specifically, to a gas shaft installation process for a gas shaft. Background technique [0002] In recent years, in response to the safety requirements of the National Coal Safety Supervision Bureau, high-gas mines must be pumped before mining. After the coal mine gas is collected from the coal seam, it is pumped to the ground by a large-diameter gas riser (the inner diameter of the pipe is about 1m), and then the gas is treated and applied. Among them, the installation of the gas riser and the filling behind the wall become the key projects. [0003] At present, there are two methods for the installation and construction of gas risers, one is the raising drilling rig sinking method, and the other is the front shaft method. Disadvantages of the front shaft method: the construction period is more than twice that of the raise drilling rig sinking method, and the engineering cost is also particula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B33/13
CPCE21B33/13E21F7/00
Inventor 程守业姜浩亮陈久福张广宇李英全李恩涛汪船徐广龙周兴荆国业韩云龙谭昊赵燕铃李丙乾
Owner BEIJING CHINA COAL MINE ENG CO LTD