CN102943687B - Pressure equalizing and hole sealing method for gas extraction drilling - Google Patents
Pressure equalizing and hole sealing method for gas extraction drilling Download PDFInfo
- Publication number
- CN102943687B CN102943687B CN201210505043.6A CN201210505043A CN102943687B CN 102943687 B CN102943687 B CN 102943687B CN 201210505043 A CN201210505043 A CN 201210505043A CN 102943687 B CN102943687 B CN 102943687B
- Authority
- CN
- China
- Prior art keywords
- pressure
- pipe
- extraction
- gas
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The invention provides a pressure equalizing and hole sealing method for gas extraction drilling. A gas extraction pipe is inserted inside a drilling hole for construction; a gas extraction chamber communication pipe and a pressure adjusting air chamber communication pipe can be inserted for sealing a drilling hole; the hole sealing inner side space is used as a gas extraction chamber; a hole sealing process can be stopped at a position 4-6 m away from a hole opening, and the hole sealing process of 2-3m can be carried out after retreating to the position of the hole opening; the middle interval space is used as a pressure adjusting air chamber, so that a gas extraction pipe is connected with a gas extraction pipe network for extraction; the pressure adjusting gas chamber and the gas extraction chamber are communicated through a U-shaped pipe filled with level-indicating liquid mounted at the outer side of a pipeline; the pressure of the gas extraction chamber is reduced with the gas extraction, so that external air enters the pressure adjusting gas chamber; the pressure of the pressure adjusting gas chamber is increased and is displayed through the level-indicating liquid on the U-shaped pipe; pressure relief is carried out by opening a pressure relief valve at a high level; and the pressure relief valve can be switched off after a liquid post of the level-indicating liquid is stable. Through fixed-period pressure relief, gas leakage plugging is realized, and the external gas is prevented from entering a channel inside the drill hole, so that the gas extraction concentration can be greatly improved; the gas extraction validity period of the drilling hole can be prolonged; and the extraction rate of the drilling hole can be improved.
Description
Technical field
The present invention relates to all pressures method for sealing of mash gas pumping drilling, be particularly useful for overcoming the technical barrier that gas pumping negative pressure is not high, extraction concentration is too low that the outside cranny development of boring causes.
Background technology
In mine gas drilling extraction work, the quality of mash gas extraction effect, depends primarily on the sealing quality of boring.China's coal-mine extraction borehole sealing material and technique mainly contain: the artificial sealing of hole of clay-stopper, hole packer sealing of hole, the expanded material mechanical type sealing of holes such as cement mortar sealing of hole and polyurethane etc.But along with the carrying out of extraction, rib crack is expanded gradually, provide gas to reveal and extraneous gas enters drilled tunnel, cause that gas pumping negative pressure is not high, gas extraction concentration is too low, has a strong impact on extracting result.
Summary of the invention
Technical problem: the present invention seeks to overcome the weak point in prior art, provide that a kind of method is simple, cost is low, effective, easy to operate, can prevent that extraneous gas from entering all pressures method for sealing of the mash gas pumping drilling of extraction borehole.
Technical scheme: all pressures method for sealing of the mash gas pumping drilling of invention, comprise to coal body construction drill, gas pumping pipe is inserted in boring, and concrete steps are as follows:
A. when gas pumping pipe inserts boring, insert extraction air chamber communicating pipe and pressure chamber communicating pipe;
B. from inside to outside boring is carried out to sealing of hole routinely, sealing of hole inner space is as extraction air chamber, stopping sealing of hole apart from 4-6m place, aperture, retreat to the sealing of hole that aperture place carries out 2-3m again, midfeather space is as pressure chamber, pressure chamber communicating pipe, the mouth of pipe was positioned at pressure chamber, and gas pumping pipe and the mouth of pipe of extraction air chamber communicating pipe are positioned at extraction air chamber;
C. connect a relief tube exposing Guan Shangjing threeway pressure chamber communicating pipe, relief valve is housed on relief tube, the U-shaped pipe being connected with extraction air chamber communicating pipe is housed exposing port pressure chamber communicating pipe, in U-shaped pipe, be marked with and show a liquid, be marked with at the U-shaped pipe that connects extraction air chamber communicating pipe one side the warning line that prevents that differential pressure of atmospheric pressure is too high;
D. gas pumping pipe is connected to gas pumping pipe network and carry out extraction, along with the extraction of gas, the pressure decreased of extraction air chamber, outside air enters pressure chamber, pressure in pressure chamber is raise, under the effect of two pressure reduction, air pressure entered through pressure chamber communicating pipe, will show that a liquid pushes to extraction air chamber communicating pipe direction;
E. when in U-shaped pipe, connect extraction air chamber communicating pipe one side show that a liquid height exceedes warning line time, open relief valve and carry out pressure release, when showing that a liquid fluid column closes relief valve after stable.
Described relief valve is manual pressure release or by sensor control releasing pressure automatically; A described liquid that shows is the organic liquid mixture body that mercury or density are larger.
Beneficial effect: owing to having adopted technique scheme, the present invention is by all pressing the pressure chamber of setting to be communicated with extraction air chamber, ensure that by the timely pressure release of relief valve extraneous gas can not enter in extraction air chamber simultaneously, effectively shutoff gas reveal and extraneous gas admission passage, improve gas extraction concentration, greatly extended gas pumping period of validity.Its method is simple, cost is low, effective, easy to operate, can prevent extraneous gas enter extraction borehole, extend gas pumping valid expiration date, there is practicality widely.
Brief description of the drawings
Fig. 1 is enforcement structural representation of the present invention.
In figure: extraction air chamber-1, coal body-2, gas pumping pipe-3, material block section-4, extraction air chamber communicating pipe-5, pressure chamber-6, pressure chamber communicating pipe-7, threeway-8, relief tube-9, relief valve-10, U-shaped pipe-11, show liquid-12, warning line-13.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
All pressures method for sealing of mash gas pumping drilling of the present invention, to coal body 2 construction drills, inserts gas pumping pipe 3 in boring routinely, when gas pumping pipe 3 inserts boring, inserts extraction air chamber communicating pipe 5 and pressure chamber communicating pipe 7; From inside to outside boring is carried out to sealing of hole routinely, stopping sealing of hole apart from 4-6m place, aperture, retreat to the sealing of hole that aperture place carries out 2-3m again, midfeather space is as pressure chamber 6, shutoff boring inner space is as extraction air chamber 1, pressure chamber communicating pipes 7, the mouth of pipe was positioned at pressure chamber 6, and gas pumping pipe 3 is positioned at extraction air chamber 1 with the mouth of pipe of extraction air chamber communicating pipe 5; Connect a relief tube 9 exposing Guan Shangjing threeway 8 pressure chamber communicating pipe 7, relief valve 10 is housed on relief tube 9, the U-shaped pipe 11 being connected with extraction air chamber communicating pipe 5 is housed exposing port pressure chamber communicating pipe 7, in U-shaped pipe 11, be marked with and show a liquid 12, be marked with and prevent the too high warning line of differential pressure of atmospheric pressure 13 at the U-shaped pipe 11 that connects extraction air chamber communicating pipes 5 one side; Gas pumping pipe 3 is connected to gas pumping pipe network and carry out extraction, along with the extraction of gas, the pressure decreased of extraction air chamber 1, outside air enters pressure chamber 6, pressure in pressure chamber 6 is raise, under the effect of two pressure reduction, air pressure entered through pressure chamber communicating pipe 7, will show that a liquid 12 is to extraction air chamber communicating pipes 5 direction pushing; When interior connection extraction air chamber communicating pipes 5 one of U-shaped pipe 11 side show that a liquid 12 highly exceedes warning line 13 time, open relief valve 10 and carry out pressure release, when showing that a liquid 12 fluid columns close relief valve 10 after stable.Described relief valve 10 is manual pressure release or by sensor control releasing pressure automatically; A described liquid that shows is the organic liquid mixture body that mercury or density are larger.
Realize by regular pressure release that shutoff gas is revealed and extraneous gas enters the passage in boring, improved gas extraction concentration, extended drilling gas extraction period of validity, improved hole pumping and mining rate.
Claims (3)
1. all pressures method for sealing of mash gas pumping drilling, comprises to coal body (2) construction drill, and gas pumping pipe (3) is inserted in boring, it is characterized in that:
A. when gas pumping pipe (3) inserts boring, insert extraction air chamber communicating pipe (5) and pressure chamber communicating pipe (7);
B. from inside to outside boring is carried out to sealing of hole routinely, sealing of hole inner space is as extraction air chamber (1), stopping sealing of hole apart from 4-6m place, aperture, retreat to the sealing of hole that aperture place carries out 2-3m again, midfeather space is as pressure chamber (6), pressure chamber communicating pipe, (7) mouth of pipe was positioned at pressure chamber (6), and gas pumping pipe (3) is positioned at extraction air chamber (1) with the mouth of pipe of extraction air chamber communicating pipe (5);
C. exposing Guan Shangjing threeway (8) connection one relief tube (9) pressure chamber communicating pipe (7), relief valve (10) is housed on relief tube (9), the U-shaped pipe (11) being connected with extraction air chamber communicating pipe (5) is housed exposing port pressure chamber communicating pipe (7), in U-shaped pipe (11), be marked with and show a liquid (12), be marked with and prevent the too high warning line of differential pressure of atmospheric pressure (13) at the U-shaped pipe (11) that connects extraction air chamber communicating pipes (5) one side;
D. gas pumping pipe (3) is connected to gas pumping pipe network and carry out extraction, along with the extraction of gas, the pressure decreased of extraction air chamber (1), outside air enters pressure chamber (6), pressure in pressure chamber (6) is raise, under the effect of two pressure reduction, air pressure entered through pressure chamber communicating pipe (7), will show that a liquid (12) is to (5) the direction pushing of extraction air chamber communicating pipe;
E. when in U-shaped pipe (11) connect extraction air chamber communicating pipe (5) one sides show that a liquid (12) highly exceedes warning line (13) time, open relief valve (10) and carry out pressure release, close relief valve (10) when showing after a liquid (12) fluid column is stablized.
2. according to all pressures method for sealing of the mash gas pumping drilling of claim 1, it is characterized in that: described relief valve (10) is for manual pressure release or by sensor control releasing pressure automatically.
3. according to all pressures method for sealing of the mash gas pumping drilling of claim 1, it is characterized in that: a described liquid that shows is the organic liquid mixture body that mercury or density are larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505043.6A CN102943687B (en) | 2012-12-03 | 2012-12-03 | Pressure equalizing and hole sealing method for gas extraction drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505043.6A CN102943687B (en) | 2012-12-03 | 2012-12-03 | Pressure equalizing and hole sealing method for gas extraction drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102943687A CN102943687A (en) | 2013-02-27 |
| CN102943687B true CN102943687B (en) | 2014-08-20 |
Family
ID=47726661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210505043.6A Expired - Fee Related CN102943687B (en) | 2012-12-03 | 2012-12-03 | Pressure equalizing and hole sealing method for gas extraction drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102943687B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420126B (en) * | 2017-07-26 | 2024-03-29 | 柴兆喜 | Pressure equalizing circulation mine gas extraction system |
| CN108104865B (en) * | 2017-11-28 | 2019-06-11 | 中国矿业大学 | A kind of concordant drilling Anti-air-leakage gas pumping method |
| CN110107346B (en) * | 2019-06-21 | 2020-03-24 | 三门前庭机械科技有限公司 | Dedicated automatic gas system of arranging in colliery hole |
| CN113217079B (en) * | 2021-03-01 | 2023-07-14 | 柴兆喜 | Pressure equalizing circulation mine gas extraction coal hole |
| CN114718517B (en) * | 2022-03-24 | 2023-05-26 | 国能神东煤炭集团有限责任公司 | Method for recycling butterfly valve on gas extraction pipe in coal mining operation |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1048125A1 (en) * | 1982-03-12 | 1983-10-15 | Ленинградский Ордена Ленина,Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Горный Институт Им.Г.В.Плеханова | Blast hole sealing arrangement |
| RU2221146C1 (en) * | 2002-07-17 | 2004-01-10 | Институт горного дела СО РАН (статус государственного учреждения) | Device sealing well-head |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| RU2394159C1 (en) * | 2009-07-06 | 2010-07-10 | Общество с ограниченной ответственностью "РосЭнергоГаз" | Procedure for degassing gas bearing ore and coal deposits at development of minerals |
| CN201851112U (en) * | 2010-10-29 | 2011-06-01 | 北京中矿天安科技发展有限公司 | Automatic hole-sealing gas pressure measuring and recording system for coal seams |
| CN102094670A (en) * | 2010-12-17 | 2011-06-15 | 中国神华能源股份有限公司 | Method for replacing mine goaf gas with carbon dioxide |
| CN102383781A (en) * | 2011-07-15 | 2012-03-21 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN102704984A (en) * | 2012-04-28 | 2012-10-03 | 中国矿业大学 | Borehole high-concentration gas extraction and drainage method and device thereof |
-
2012
- 2012-12-03 CN CN201210505043.6A patent/CN102943687B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1048125A1 (en) * | 1982-03-12 | 1983-10-15 | Ленинградский Ордена Ленина,Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Горный Институт Им.Г.В.Плеханова | Blast hole sealing arrangement |
| RU2221146C1 (en) * | 2002-07-17 | 2004-01-10 | Институт горного дела СО РАН (статус государственного учреждения) | Device sealing well-head |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| RU2394159C1 (en) * | 2009-07-06 | 2010-07-10 | Общество с ограниченной ответственностью "РосЭнергоГаз" | Procedure for degassing gas bearing ore and coal deposits at development of minerals |
| CN201851112U (en) * | 2010-10-29 | 2011-06-01 | 北京中矿天安科技发展有限公司 | Automatic hole-sealing gas pressure measuring and recording system for coal seams |
| CN102094670A (en) * | 2010-12-17 | 2011-06-15 | 中国神华能源股份有限公司 | Method for replacing mine goaf gas with carbon dioxide |
| CN102383781A (en) * | 2011-07-15 | 2012-03-21 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN102704984A (en) * | 2012-04-28 | 2012-10-03 | 中国矿业大学 | Borehole high-concentration gas extraction and drainage method and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102943687A (en) | 2013-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108119094B (en) | Two-plugging one-injection one-row hole sealing device for deep coal seam gas extraction drilling and use method | |
| CN102943687B (en) | Pressure equalizing and hole sealing method for gas extraction drilling | |
| CN102140901B (en) | High pressure resistant drilled hole sealing method | |
| CN103195390B (en) | The nearly horizontal mash gas pumping drilling encapsulating method in this coal seam a kind of | |
| CN109681262B (en) | Method for improving gas drilling extraction concentration in broken coal body | |
| CN111155960B (en) | Coal seam gas extraction drilling and sealing method based on MICP technology | |
| CN111236917B (en) | Complete equipment and method for coal rock water-acid high-pressure presplitting softening scour prevention and permeability increase | |
| CN102937011B (en) | Mash gas pumping drilling group regional crack field secondary grouting plugging device and method | |
| CN105507940A (en) | Slotting, plugging and fracturing integrated type intensified marsh gas extraction device and method | |
| CN103306657B (en) | A kind of coal seam cutting release is anti-reflection and slot holding device and method | |
| CN105697053A (en) | Pumping and pressing hybrid gas extraction downward drilling and water draining device | |
| CN214330681U (en) | Three-blocking two-injection hole packer for coal mine gas extraction drill hole | |
| CN104295263A (en) | Radial hole sealing device for drill holes for exhausting coal bed gas | |
| CN103912304A (en) | Method for locally extracting gas of soft coal seams | |
| CN201129184Y (en) | Tubule external valve one-way type subsection back grouting apparatus | |
| CN102704986A (en) | Pressure-controlled hole sealing method for gas drainage hole | |
| CN201206471Y (en) | Sealing device for pumping borehole | |
| CN106930724A (en) | One kind is rich in water borehole sealing and gas pumping integral method | |
| CN207048813U (en) | Sealing and leakage plugging device for gas pumping | |
| CN103939143A (en) | Method for measuring range of influence of crushed zones of coal bed roadway and device thereof | |
| CN103147741B (en) | Coal bed roadside pressure relief zone width measuring method based on drill hole gas leakage | |
| CN208456572U (en) | Packaged type hydraulic fracturing and injection hole sealing integrated apparatus | |
| CN109578058B (en) | Method for improving gas extraction concentration of extraction borehole through auxiliary drilling | |
| CN204571919U (en) | To mensuration coal-bed gas pressure drilling and sealing device under colliery | |
| CN103195470A (en) | Gas discharge collecting device for drilling construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20191203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |