Hole reinforcement and outburst prevention device
A technology for preventing outburst and fixing holes. It is used in safety devices, gas discharge, wellbore/well components, etc. It can solve the problems of long construction time, poor sealing performance, complicated construction equipment, etc., and achieve convenient device processing and good sealing performance. , the effect of simple structure
Active Publication Date: 2014-05-21
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP +1
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Problems solved by technology
[0006] The present invention mainly solves the problems of long construction time, poor sealing performance and complex construction equipment in the prior art, and provides a fast hole fixing and outburst prevention device suitable for drilling in soft and outburst coal seams, which has a simple structure and is easy to use ;Short construction time, can be used multiple times;Good sealing performance, can effectively prevent the gas in the hole from gushing out of the orifice
Method used
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[0028] Such as Figure 1 to Figure 7 The hole fixing and outburst prevention device shown includes: a special orifice pipe 17, an outburst prevention oil filling device 18, a solid pipe oil filling device 19, and the outer wall of the part where the drill pipe 5 passes through the special orifice pipe 17 An inflatable anti-burst cavity 8 is provided on the top, and the anti-burst cavity 8 communicates with the anti-burst oil-filled device 18; an expandable solid tube cavity 6 is sleeved on the outer wall of the special orifice tube 17, so that The solid tube cavity 6 communicates with the solid tube oil filling device 19 .
[0029] The special orifice tube 17 includes a fixed tube 2 and a flange connection plate 1 and a tapered anti-burst tube 3 respectively located at both ends of the fixed tube 2. The anti-burst cavity 8 is located in the tapered anti-burst tube 3; There are several solid tube cavity oil filling nozzles 7 connected with the solid tube oil filling device 19;...
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The invention relates to a hole reinforcement and outburst prevention device, in particular to a quick hole reinforcement and outburst prevention device applicable to drilling on a soft outburst coal seam. The hole reinforcement and outburst prevention device comprises a special orifice tube, an outburst prevention and oil charge device and a tube reinforcement and oil charge device. An expandable outburst prevention bag cavity is arranged on the outer wall of the part, penetrating through the special orifice tube, of a drill stem. The outburst prevention bag cavity is communicated with the outburst prevention and oil charge device. The outer wall of the special orifice tube is sleeved with an expandable tube reinforcement bag cavity which is communicated with the tube reinforcement and oil charge device. Thus, the hole reinforcement and outburst prevention device has the advantages that the device is simple in structure, convenient to manufacture and easy and convenient to operate, and a hole reinforcement process is omitted; the outburst prevention structure is arranged in a hole, the number and weight of orifice devices are reduced, and underground movement is facilitated; the device is good in sealing performance and capable of effectively preventing gas in the hole from bursting out of the orifice.
Description
technical field [0001] The invention relates to a hole fixing and outburst preventing device, in particular to a fast hole fixing and outburst preventing device suitable for drilling in soft and outburst coal seams. Background technique [0002] In the process of underground mining of soft and outburst coal seams, coal and gas outburst accidents occur frequently, and the supervision and control of gas outburst accidents in various mining areas are becoming increasingly strict. The fundamental method of gas control in soft and outburst coal seams is gas drainage through boreholes in the coal seams. In order to prevent the hole wall from collapsing and gas outburst, during construction, the ordinary orifice pipe is lowered in the drilling first, and after the first grouting to fix the pipe, a mechanical anti-outburst device is added to the front end of the orifice pipe. The working principle of the anti-outburst device is to use a mechanical device to block the annular space ...
Claims
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IPC IPC(8): E21F7/00E21B33/10
Inventor 殷新胜李伟陈家祥徐瑞连昌宝王毅刘勇冀前辉张哲何世久
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP