Defoaming device and method for coal-mine foam drilling

A defoaming device and foam technology, which are used in earth-moving drilling, flushing wells, wellbore/well components, etc., can solve the problem that there is no underground foam drilling process in coal mines, it is difficult to meet fast and reliable defoaming, and space conditions are limited. and other problems to achieve the effect of overcoming the influence of repeated foaming, light weight and less dosage

Active Publication Date: 2013-12-18
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

[0005] The operating environment of underground drilling in coal mines is unique: ①Underground coal mines belong to an explosive gas environment, ②The space conditions of underground drilling in coal mines are limited. Therefore, the defoaming technology and supporting equipment for underground foam drilling in coal mines must have explosion-proof performance With the characteristics of simple structure, convenient operation, and fast and reliable defoaming, there is no special defoaming method and device for the foam drilling process in coal mines, and the existing defoaming methods for ground applications have poor adaptability to the construction environment of coal mines , it is difficult to meet the requirements of fast and reliable defoaming

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  • Defoaming device and method for coal-mine foam drilling
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  • Defoaming device and method for coal-mine foam drilling

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0028] see figure 1 , a defoaming device for underground foam drilling in coal mines includes three key components: a rotary jet defoamer 3, a defoamer solution injector 9 and a centrifugal defoamer 5, wherein the core component is the rotary jet defoamer 3 and the defoamer The agent solution injector 9 is directly connected by thread, and is connected with the centrifugal defoaming device 5 by a rubber hose.

[0029] The defoaming method of the present invention is realized through the following steps:

[0030] a. Connect the intake high-pressure rubber hose 8 with the gas source, slowly open the compressed air control valve 6, and indicate the gas volume by the gas flow m...

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Abstract

The invention discloses a defoaming device and method for coal-mine foam drilling. When a foam drilling process is utilized to perform construction of bedding gas drainage long boreholes among soft coal seams in the coal mine, the problems that waste foam accumulates in the drilling field for a long time and normal drilling construct operations are affected exist. According to the defoaming method, compressed air is adopted as a motive medium, wall-adherent jet is adopted as one single motive source, three technical manners of chemical defoaming, air flow jet defoaming and centrifugal defoaming are integrated, and the defoaming method has the advantages of reliable and rapid defoaming; the matching device is free of movable parts and electrical components, the requirements on explosion-proof performance of equipment in coal-mine construction operating environment can be met, and the defoaming device has the advantages of small size, lightweight performance and low requirements on place conditions.

Description

technical field [0001] The invention relates to the technical field of underground foam drilling in coal mines, in particular to a defoaming device and method for underground foam drilling in coal mines. Background technique [0002] Coal mine underground foam drilling technology is a construction method developed on the basis of medium-wind pressure air drilling technology, which is mainly used for construction of long boreholes (hole depth > 120m) for gas drainage in soft coal seams. [0003] Soft coal seams account for a considerable proportion of mineable coal seams in my country, and gas disaster control is particularly important in the process of mining soft coal seams. one. Gas pre-drainage is the most effective technical means to reduce gas content in soft coal seams and prevent gas disasters, and it is also the basis for comprehensive utilization of gas. The key to implementing underground gas pre-drainage is the construction of bedding-drainage boreholes. Long...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/06E21B21/14
Inventor 殷新胜刘建林史海岐王毅刘勇冀前辉曹明
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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