CN103953331B - A kind of self-drilling type coal-bed gas pressure in-site detecting device - Google Patents
A kind of self-drilling type coal-bed gas pressure in-site detecting device Download PDFInfo
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- CN103953331B CN103953331B CN201410175472.0A CN201410175472A CN103953331B CN 103953331 B CN103953331 B CN 103953331B CN 201410175472 A CN201410175472 A CN 201410175472A CN 103953331 B CN103953331 B CN 103953331B
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Abstract
A kind of self-drilling type coal-bed gas pressure in-site detecting device of the present invention.Determination of coal seam gas pressure can be realized under the premise of not extracting drilling rod out, especially suitable for measuring easy collapse hole coal-bed gas pressure.Including drilling system, sealing of hole system, pressure measuring system.After drilling reaches design drilling depth, exiting drilling machine and stepping back drilling rod is more than a distance for insulating capsule groove width, is connected to feed flow and drain line, connects gas pressure measurement conducting wire and instrument, gap between sealed cooling water passageway and packing drilling rod periphery and the wall of a borehole forms enclosure space.Gas pressure measurement instrument is opened, measures gas pressure variation in enclosure space, steady pressure is the drilling original position gas pressure.Finally, restoring the connection of cooling-water duct by the operation to capsule piston, packing capsule, casing capsule, close gas pressure probe cavity, restore sliding threaded sleeve screw position, removes the outer feed flow of drilling rod and drain line and gas pressure measurement device, extract drilling rod or continue to creep into.
Description
Technical field
The present invention relates to a kind of self-drilling type coal-bed gas pressure in-site detecting device, can in-site detecting coal-bed gas pressure,
Especially suitable for measuring easy collapse hole weak seam gas pressure.
Background technique
Coal-bed gas pressure is the power of gas ejection and coal and gas prominent, there is positive close with coal seam gas-bearing capacity
System.Determination of coal seam gas pressure is an element task for preventing and treating coal mine gas disaster, and is examined projecting coal bed after extraction
Whether the important means of extinction.Test coal-bed gas pressure at present, mostly uses coal industry standard AQ10478-2007 " coal mine
The regulation of the Direct Determination of down-hole coal bed gas pressure " defined grouting pump sealing of hole passive type method.Test philosophy
To reach the gas pressure of balance at drilling exposure using the naturally osmotic principle measurement of gas in coal seam, which utilizes
Gas-guide tube is placed in coal seam by layer-through drilling, and gas-guide tube connects with orifice pressure gage, and the pressure change of coal-bed gas fluid is logical
It crosses pressure-measuring pipe to be reflected on external pressure gauge, observes the variation of pressure value daily, reach to stablize to pressure value and complete to be somebody's turn to do after a week
The coal-bed gas pressure in hole is tested, and the period for testing a hole is generally 30d or so.
Currently, carrying out gas pressure measurement to coal seam mainly uses first drilling, it is deep that pressure measuring unit is then sent into drilling
Portion finally carries out sealing of hole and surveys pressure.The process that drilling rod is withdrawn from after pore-forming will lead to the intracorporal gas of a certain range coal around drilling
It discharges rapidly, and sealing of hole process extends the release time of gas in drilling surrounding medium again, so as to cause needing with longer
Minute can just measure true gas pressure value；In addition, usually drilling when carrying out drilling survey pressure to weak seam
It collapses, clogging, so having led to next survey pressure work can not carry out.
Due to the progress of present extraction technique and equipment, coal roadway tunneling speed is getting faster, and the pressure of protrusion-dispelling is also more next
It is bigger, only the loss of protrusion-dispelling bring production efficiency is made up by constantly shortening the testing time of every prevention prominent index.
According to existing protrusion-dispelling regulation, the protrusion-dispelling index test other than coal-bed gas pressure can be accomplished substantially with boring with survey, when
It can be obtained by various test index data.
To alleviate the time inconsistency between determination of coal seam gas pressure and driving, and it is easy to collapse hole cherry coal gas convenient for measurement
Pressure proposes a kind of self-drilling type determination of coal seam gas pressure device, can accomplish to greatly shorten coal-bed gas pressure with boring with survey
The time of power measurement.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of self-drilling type coal-bed gas pressure in-site detecting device, which can be fitted
For the measurement of most of coal-bed gas pressures, easily collapses especially for drilling, easily stifled weak seam, survey can be increased substantially
Determine efficiency, and due to being encapsulated the reliability that hole greatly improves measurement pressure value using double hole sealing glue.
The present invention provides a kind of self-drilling type coal-bed gas pressure in-site detecting device.The device includes drilling system, sealing of hole
System and pressure measuring system.
The drilling system includes the body of rod, screw thread, the first liquid feeding channel, the second liquid feeding channel, third liquid feeding channel, conducting wire
Channel, movable whorl casing, packing capsule slot, cannula slide mechanism, drill bit, the first cooling-water duct and the second cooling water are logical
Road, the first capsule piston and the second capsule piston, gas pressure measurement probe cavity.Drilling system destroys coal body by drill bit,
By drill rod body and drill rod thread deslagging, cooling and auxiliary deslagging function are provided by supplying water to cooling-water duct.
The sealing of hole system include solution feed pump, vacuum pump, pressure duct, four-way valve, switch, triple valve, high pressure aluminium-plastic pipe,
The outer feed flow of the drilling rod of pressure gauge composition or drainage system, liquid feeding channel, capsule piston, cannula slide mechanism, packing capsule.Feed flow
Pump and vacuum pump control the supply and discharge of 3 liquid feeding channel liquid by 2 four-way valves and 3 triple valves, share 3 feed flows
Pipe and 3 drain pipes, whether having its connection of 6 switch controls respectively, 3 pressure gauges are for observing 3 liquid feeding channel liquid
Real-time pressure.First liquid feeding channel, third liquid feeding channel, cannula slide mechanism, the first packing capsule and the second packing capsule control
The packing of air between drilling rod and hole wall processed；The first packing capsule and the second packing capsule are cyclic annular capsule；Described sleeve pipe is sliding
Motivation structure includes casing floor, cannula slide ring flat-plate, first sleeve capsule, the second casing capsule, movable whorl casing.When first
Liquid feeding channel pressurization, the decompression of third liquid feeding channel, then first sleeve capsule pressurization elongation, the decompression of the second casing capsule are shortened, set
Pipe slides ring flat-plate and drives movable whorl casing to slide to bottom hole direction along casing capsule slide axis by casing floor, until complete
Packing capsule slot is opened, the first packing capsule and the second packing capsule is made to be exposed to hole wall.Finally it is pressurized the second liquid feeding channel,
So that the first packing capsule and second is insulated capsule pressurization elongation, compresses hole wall, completely cut off the gas fluid communication inside and outside hole.Second supplies
Liquid channel, the first capsule piston control packing cooling-water duct, when the pressurization of the second liquid feeding channel, then the first capsule plunger booster is stretched
It is long, so that the first capsule piston is insulated cooling-water duct；Complete sealing of hole work.In the case of normal drilling, the first packing capsule and the
Two packing capsule decompressions are shunk, and sliding sleeve and drill rod thread and drill rod body are in close contact, the pressurization elongation of the second casing capsule,
The decompression of first sleeve capsule is shunk, and the second capsule plunger booster elongation, the first capsule piston decompression is shunk.It surveys under pressure condition, the
The pressurization elongation of sleeve capsule, the decompression of the second casing capsule are shunk, and the decompression of the second capsule piston is shunk, the first capsule plunger booster
Elongation, the first packing capsule and the second packing capsule pressurization elongation.
The pressure measuring system includes the second capsule piston, third liquid feeding channel, gas pressure measurement probe, gas pressure survey
Determine conducting wire, gas pressure measurement instrument.The gas pressure measurement probe is installed in gas pressure measurement probe cavity, by conducting wire
Channel inside conductor, gas pressure measurement conducting wire are connected to gas pressure measurement instrument.When third liquid feeding channel pressure reduction, the second glue
Capsule piston retraction, gas pressure measurement probe cavity outlet are opened, and methane gas enters gas pressure measurement by cooling-water duct
Probe cavity is popped one's head in by gas pressure measurement and measures gas pressure, and data pass to gas pressure through gas pressure measurement conducting wire and survey
Determine instrument.
Detailed description of the invention
Fig. 1 is a kind of self-drilling type coal-bed gas pressure in-site detecting device diagrammatic cross-section of the present invention.
In figure: 1 is gas pressure measurement instrument；2 be gas pressure measurement conducting wire；3 be vacuum pump；4 be the first high pressure plastic-aluminum
Pipe；5 be the first four-way valve；6 be the second high pressure aluminium-plastic pipe；7 be first switch；8 be the first triple valve；9 be the high jewelling of third
Modeling pipe；10 be first pressure gauge；11 be the 4th high pressure aluminium-plastic pipe；12 be second switch；13 be the second triple valve；14 be second
Pressure gauge；15 be the 5th high pressure aluminium-plastic pipe；16 switch for third；17 be the 6th high pressure aluminium-plastic pipe；18 be third threeway
Valve；19 be the 7th high pressure aluminium-plastic pipe；20 be third pressure gauge；21 be solution feed pump；22 be the 8th high pressure aluminium-plastic pipe；23 be second
Four-way valve；24 be the 4th switch；25 be the 9th high pressure aluminium-plastic pipe；26 be the 5th switch；27 be the tenth high pressure aluminium-plastic pipe；28 are
6th switch；29 be the 11st high pressure aluminium-plastic pipe；30 be drill rod thread；31 be drill rod body；32 be coal body；33 be drilling；34
For the first liquid feeding channel；35 be the second liquid feeding channel；36 be the first cooling-water duct；37 be gas pressure measurement wire channel；
38 be third liquid feeding channel；39 be the second cooling-water duct；40 be the first capsule piston；41 pop one's head in for gas pressure measurement；42
For gas pressure measurement probe cavity；43 be the second capsule piston；44 be the first packing capsule；45 be packing capsule slot；46 are
Second packing capsule；47 be movable whorl casing；48 be first sleeve capsule；49 be casing capsule axis；50 be cannula slide ring
Plate；51 be the second casing capsule；52 be collection headroom；53 be drill bit；54 be casing floor.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
The present invention provides a kind of self-drilling type coal-bed gas pressure in-site detecting device.
As shown in Figure 1, the specific steps of the present invention are as follows.
(1) after drilling to set depth, drilling rod is mobile to hell direction, moving distance is greater than packing capsule groove width
Degree, less than 2 times of packing capsule groove width.Drilling machine steps back a distance, and drilling rod is exited from drilling machine.
(2) it connects the 7th high pressure aluminium-plastic pipe 19 and the first liquid feeding channel 34, the 5th high pressure aluminium-plastic pipe 15 and the second feed flow is logical
Road 35, third high pressure aluminium-plastic pipe 9 and third liquid feeding channel 38, gas pressure measurement conducting wire 2 and gas pressure measurement wire channel
Conducting wire in 37.
(3) second switch 12, third switch 16, the 4th switch 24, the 5th switch 26, opening first switch 7 and the are closed
Six switches 28 open solution feed pump 21 and vacuum pump 3.Solution feed pump 21 passes through the 8th high pressure aluminium-plastic pipe 22, the second four-way valve the 23, the 6th
Switch 28, the 11st high pressure aluminium-plastic pipe 29, third triple valve 18, the 7th high pressure aluminium-plastic pipe 19, the first liquid feeding channel 34 control the
Sleeve capsule 48；Vacuum pump 3 passes through the first high pressure aluminium-plastic pipe 4, the first four-way valve 5, the second high pressure aluminium-plastic pipe 6, first switch
7, the first triple valve 8, third high pressure aluminium-plastic pipe 9, third liquid feeding channel 38 control the second capsule piston 43 and the second casing capsule
51；The reading of first pressure gauge 10 reduces, and the reading of third pressure gauge 20 increases.Second capsule piston 43 is shunk, and surveys gas pressure
Fixed probe is connected to the second cooling-water duct 39, the gas pressure of impression collection headroom 52.Second casing capsule 51 decompression contraction,
The pressurization elongation of first sleeve capsule 48, slides along casing capsule axis 49 and shrinks, push cannula slide ring flat-plate 50,54 and of casing floor
Movable whorl casing 47 is slided to bottom hole direction, and the first packing capsule 44 and the second packing capsule 46 is exposed.
(4) second switch 12, third switch 16, the 4th switch 24, the 6th switch 28, first switch 7 are closed, opens the 5th
Switch 26 closes vacuum pump 3, continues starting solution feed pump 21.Solution feed pump 21 passes through the 8th high pressure aluminium-plastic pipe 22, the second four-way valve
23, the 5th switch 26, the tenth high pressure aluminium-plastic pipe 27, the second triple valve 13, the 5th high pressure aluminium-plastic pipe 15, the control of the second liquid feeding channel 35
Make the first capsule piston 40, first packing capsule 44 and the second packing capsule 46；The reading of second pressure gauge 14 increases, the first capsule
The pressurization elongation of piston 40, blocks the first cooling-water duct 36, and it is logical to completely cut off the first cooling-water duct 36 and the second cooling water in drilling rod
Gas fluid communication between road 39；To the first packing capsule 44 and the second packing 46 feed flow of capsule pressurization, first insulates solution feed pump
Capsule 44 and the second packing pressurization elongation of capsule 46, compress hole wall, completely cut off between drilling rod and hole wall the gas stream insulated inside and outside capsule
Communications and liaison system；Complete sealing of hole work.
(5) gas pressure measurement instrument 1 is opened, reads survey pressure 41 data of probe in real time, when data keep stablizing, it is believed that
Pressure is surveyed to complete.
(6) it surveys after the completion of pressure work, closes first switch 7, third switch 16, the 4th switch 24, the 5th switch the 26, the 6th
Switch 28 opens second switch 12, closes solution feed pump 21, opens vacuum pump 3.Vacuum pump 3 passes through the first high pressure aluminium-plastic pipe 4, the
One four-way valve 5, the 4th high pressure aluminium-plastic pipe 11, the second triple valve 13, the 5th high pressure aluminium-plastic pipe 15, the second liquid feeding channel 35, control
First capsule piston 40, first insulates capsule 44 and the second packing capsule 46.The reading of second pressure gauge 14 reduces, and the first capsule is living
Plug 40 is shunk, and the first cooling-water duct 36 is connected to the recovery of the second cooling-water duct 39；First packing capsule 44 and the second packing
Capsule 46 is shunk, and leaves hole wall, is close to the body of rod.
(7) the 5th switch 26, the 6th switch 28, first switch 7, second switch 12 are closed, third switch the 16, the 4th is opened
Switch 24 opens simultaneously solution feed pump 21, and holding vacuum pump 3 is run.Vacuum pump 3 passes through the first high pressure aluminium-plastic pipe 4, the first four-way
Valve 5, the 6th high pressure aluminium-plastic pipe 17, the first triple valve 18, the 7th high pressure aluminium-plastic pipe 19, the first liquid feeding channel 34 control first sleeve
Capsule 48 shrinks first sleeve capsule 48；Solution feed pump 21 is high by the 8th high pressure aluminium-plastic pipe 22, the second four-way valve the 23, the 9th
Aluminium-plastic pipe 25, the first triple valve 8, third high pressure aluminium-plastic pipe 9, third liquid feeding channel 38 is pressed to control the second capsule piston 43 and second
Casing capsule 51.The reading of first pressure gauge 10 increases, and the reading of third pressure gauge 20 reduces.The pressurization elongation of second capsule piston 43,
Gas pressure measurement probe cavity 42 is blocked, water in cooling-water duct when making gas pressure measurement probe 41 not by normal drilling
Influence；The pressurization of second casing capsule 51 is extended along casing capsule axis 49, and first sleeve capsule 48 is shunk along casing capsule axis 49,
It pushes cannula slide ring flat-plate 50, casing floor 54 and movable whorl casing 47 to slide to aperture direction, keeps the company of drill rod thread
Continuous property, and the first packing capsule 44 and the second packing capsule 46 is isolated with hole wall.
(8) it disconnects the 7th high pressure aluminium-plastic pipe 19 and the first liquid feeding channel 34, the 5th high pressure aluminium-plastic pipe 15 and the second feed flow is logical
Road 35, third high pressure aluminium-plastic pipe 9 and third liquid feeding channel 38, gas pressure measurement conducting wire 2 and gas pressure measurement wire channel
Conducting wire in 37.
(9) drilling rod is exited, or connection drilling machine continues to creep into drilling rod.
(10) creep into other drilling or continue drilling reach design drilling depth after, when needing to measure gas pressure, repeat
Step (1) ~ (9).
Claims (1)
1. a kind of self-drilling type coal-bed gas pressure in-site detecting device, including drilling system, sealing of hole system, pressure measuring system, special
Sign is,
1) drilling system includes that the body of rod, screw thread, the first liquid feeding channel, the second liquid feeding channel, third liquid feeding channel, conducting wire are logical
Road, movable whorl casing, packing capsule slot, cannula slide mechanism, drill bit, the first cooling-water duct and the second cooling-water duct,
First capsule piston and the second capsule piston, gas pressure measurement probe cavity；The drilling system destroys coal body by drill bit,
By drill rod body and drill rod thread deslagging, cooling and auxiliary deslagging function are provided by supplying water to cooling-water duct；
2) the sealing of hole system includes solution feed pump, vacuum pump, pressure duct, four-way valve, switch, triple valve, high pressure aluminium-plastic pipe, pressure
The outer feed flow of the drilling rod of power table composition or drainage system, liquid feeding channel, capsule piston, cannula slide mechanism, the first and second packings
Capsule；The solution feed pump and vacuum pump control the supply and row of 3 liquid feeding channel liquid by 2 four-way valves and 3 triple valves
Out, 3 liquid supply pipes and 3 drain pipes are shared, whether having its connection of 6 switch controls respectively, 3 pressure gauges are for observing 3
The real-time pressure of liquid feeding channel liquid；First liquid feeding channel, third liquid feeding channel, cannula slide mechanism, the first packing glue
The packing of air between capsule and the second packing capsule control drilling rod and hole wall；The first packing capsule and the second packing capsule are ring
Shape capsule；Described sleeve pipe sliding equipment includes casing floor, cannula slide ring flat-plate, first sleeve capsule, the second casing capsule, work
Dynamic threaded sleeve, when the first liquid feeding channel is pressurized, the decompression of third liquid feeding channel, then first sleeve capsule is pressurized elongation, second set
The decompression of pipe capsule is shortened, and cannula slide ring flat-plate drives movable whorl casing sliding along casing capsule to bottom hole direction by casing floor
Moving axis sliding makes the first packing capsule and the second packing capsule be exposed to hole wall until fully opening packing capsule slot；Finally make
Second liquid feeding channel, the first packing capsule and the second packing capsule pressurization elongation, compress hole wall, completely cut off the gas circulation inside and outside hole
Connection；Second liquid feeding channel, the first capsule piston control packing cooling-water duct, when the second liquid feeding channel is pressurized, then the
The elongation of one capsule plunger booster, makes the first capsule piston insulate cooling-water duct, completes sealing of hole work；In the case of normal drilling,
First packing capsule and the second packing capsule decompression are shunk, and sliding sleeve and drill rod thread and drill rod body are in close contact, and second
The pressurization elongation of casing capsule, the decompression of first sleeve capsule are shunk, and the second capsule plunger booster elongation, the first capsule piston decompression is received
Contracting；It surveys under pressure condition, first sleeve capsule pressurization elongation, the second casing capsule decompression is shunk, and the decompression of the second capsule piston is shunk,
The elongation of first capsule plunger booster, the first packing capsule and the second packing capsule pressurization elongation；
3) pressure measuring system includes the second capsule piston, third liquid feeding channel, gas pressure measurement probe, gas pressure measurement
Conducting wire, gas pressure measurement instrument；The gas pressure measurement probe is installed in gas pressure measurement probe cavity, is led to by conducting wire
Road inside conductor, gas pressure measurement conducting wire are connected to gas pressure measurement instrument；When third liquid feeding channel pressure reduction, the second capsule
Piston decompression is shunk, and gas pressure measurement probe cavity outlet is opened, and methane gas enters gas pressure by cooling-water duct and surveys
Surely it pops one's head in cavity, is popped one's head in measurement gas pressure by gas pressure measurement, data pass to gas pressure through gas pressure measurement conducting wire
Analyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175472.0A CN103953331B (en) | 2014-04-29 | 2014-04-29 | A kind of self-drilling type coal-bed gas pressure in-site detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175472.0A CN103953331B (en) | 2014-04-29 | 2014-04-29 | A kind of self-drilling type coal-bed gas pressure in-site detecting device |
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| Publication Number | Publication Date |
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| CN103953331A CN103953331A (en) | 2014-07-30 |
| CN103953331B true CN103953331B (en) | 2019-07-19 |
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| CN201410175472.0A Expired - Fee Related CN103953331B (en) | 2014-04-29 | 2014-04-29 | A kind of self-drilling type coal-bed gas pressure in-site detecting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695940B (en) * | 2015-02-05 | 2018-02-16 | 煤科集团沈阳研究院有限公司 | Coal bed drilling gas inrush initial velocity measurement device and assay method |
| CN104747075B (en) * | 2015-02-14 | 2017-01-25 | 河南理工大学 | Anti-collapsing drilling method for grout spraying of soft coal seam |
| CN105927214B (en) * | 2016-05-19 | 2022-11-11 | 六盘水师范学院 | Method for accurately measuring gas pressure of original coal seam |
| CN108457643B (en) * | 2018-02-05 | 2020-07-31 | 中国矿业大学 | Water-invasion drilling gas pressure measuring method based on vacuum condition |
| CN110725661B (en) * | 2019-11-06 | 2021-12-17 | 河南理工大学 | Segmented spiral rubber bag hole sealing device |
| CN111677495B (en) * | 2020-05-08 | 2023-08-15 | 中煤科工集团西安研究院有限公司 | Coal mine underground directional drilling while-drilling gas measuring device, drilling tool and measuring method |
| CN111948645A (en) * | 2020-08-07 | 2020-11-17 | 武汉长盛煤安科技有限公司 | Coal mine roadway and tunnel drilling while drilling radar advanced detection device and method |
| CN113153274B (en) * | 2021-04-30 | 2022-09-09 | 中国矿业大学 | Deep coal seam in-situ gas content measuring method |
| CN114215507B (en) * | 2021-05-21 | 2023-11-17 | 华北科技学院(中国煤矿安全技术培训中心) | Gas pressure measuring device and method based on directional drilling machine |
| CN113237453B (en) * | 2021-05-28 | 2023-08-22 | 中煤科工集团沈阳研究院有限公司 | Automatic measurement device and method for expansion deformation of push-expansion type protected layer |
| CN114809915B (en) * | 2022-04-15 | 2022-11-22 | 河南理工大学 | Hole drilling, sealing and pressure measuring integrated device and pressure measuring method for coal seam deep and long hole |
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| RU2078924C1 (en) * | 1993-05-12 | 1997-05-10 | Внедренческая научно-производственная фирма "НефтеТестСервис" | Formation tester |
| CN2558757Y (en) * | 2002-06-18 | 2003-07-02 | 大庆石油管理局 | Pressure compensator of pressure maintaining seal coring tool |
| CN101581219A (en) * | 2008-05-16 | 2009-11-18 | 中国科学院力学研究所 | Device and method for measurement while drilling of ground stress |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3690375A (en) * | 1971-04-05 | 1972-09-12 | Harold E Shillander | Inflatable packer |
| US4411315A (en) * | 1981-06-29 | 1983-10-25 | Hughes Tool Company | Drag spring unit |
| RU2078924C1 (en) * | 1993-05-12 | 1997-05-10 | Внедренческая научно-производственная фирма "НефтеТестСервис" | Formation tester |
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| CN103953331A (en) | 2014-07-30 |
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Granted publication date: 20190719 Termination date: 20200429 |