CN101581217A - Device and method for coal bed gas pressure/content measurement while drilling - Google Patents
Device and method for coal bed gas pressure/content measurement while drilling Download PDFInfo
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- CN101581217A CN101581217A CNA2008101117017A CN200810111701A CN101581217A CN 101581217 A CN101581217 A CN 101581217A CN A2008101117017 A CNA2008101117017 A CN A2008101117017A CN 200810111701 A CN200810111701 A CN 200810111701A CN 101581217 A CN101581217 A CN 101581217A
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Abstract
The invention disclose a device for coal bed gas pressure/content measurement while drilling, which comprises a drill rod and a drill bit, wherein the side wall of the drill rod is intensively provided with a plurality of holes for coal bed gases to pass through. The measurement device also comprises a sensor and a signal processing device, wherein the sensor is arranged inside the body of the rod behind the through holes for the coal bed gas to pass through; and the signal processing device is positioned on the outside of the drill rod for processing signals acquired by the sensor. A method for coal bed gas pressure/content measurement while drilling comprises the following steps: selecting a positioned to be measured on an underground working face and using a drill to drive the device for coal bed gas pressure/content measurement while drilling to perform drilling construction; stopping a machine after drilling, separating the drill rod from the drill, and connecting the sensor and the signal processing device through a wire; and sealing an outlet on the rear part of the drill rod, and after some time, measuring the pressure/content of the coal bed gases by using the sensor. The device and the method can improve measurement precision, reduce measurement time and realize continuous measurement while drilling.
Description
Technical field
The present invention relates to a kind of measurement mechanism and method of pressure/content of coal bed gas, relate in particular to a kind of pressure/content measurement while drilling device and method of coal bed gas.
Background technology
Mine gas accident is one of natural calamity the most serious in the Coal Production, and coal bed gas (gas) pressure is the power that gas is gushed out from the coal seam; And coal seam gas-bearing capacity is to characterize coal-bed gas to compose the situation of depositing, and estimates colliery exploitation condition, determines one of important evidence of safety of coal mines technical measures and gas development and use.So, often to measure in opening driving and the coal mining process in the coal seam gas pressure/content.At present, measure both at home and abroad gas pressure oneself technology is arranged all is to adopt from rock gangway (coal road) to the hole of drilling, coal seam, from boring, draw a pipe, and with direct sealing of holes of solids such as clay, cement mortar, cushion rubber, capsules, by the piezometer tube of from boring, drawing, directly read the gas pressure value with pressure meter.This pressure testing method can obtain correct gas pressure value under the condition of sealing of hole section rock hard and compact, but owing to mostly be the sand rammell with top, floor strata that the coal seam directly contacts, in the sand rammell boring (aperture is generally 75 millimeters) after, often there is microfissure around the hole wall, the solids of sealing of hole can not tightly seal the crack of borehole circumference, thereby gas leakage easily.The gas permeability in coal seam is very low, and the micro-leakage of boring will make the force value of measuring be significantly less than the real gas pressure in coal seam, and the technology that can lead to errors is like this judged, caused huge accident.And measuring data in this case often needs 7～8 hours, spends a large amount of labour's man-hours.Particularly when soft seam was difficult for pore-forming, this method just can not be used again.
Summary of the invention
At the problem that prior art exists, the purpose of this invention is to provide and a kind ofly can improve certainty of measurement, and the measurement mechanism and the method for the pressure/content of the short coal bed gas of Measuring Time.
For achieving the above object, the invention provides a kind of pressure/content measurement while drilling device of coal bed gas, comprise drilling rod and drill bit, concentrate on the sidewall of described drilling rod and be provided with a plurality of through holes that supply coal bed gas to pass through, described measurement mechanism also comprises sensor and signal processing apparatus, described sensor is arranged on the shaft inside at the rear portion of the through hole that passes through for coal bed gas, and described signal processing apparatus is positioned at described drilling rod outside, is used to handle the signal of described sensor acquisition.
Further, the position of close drill bit on the described drilling rod that through hole is positioned at drill bit links to each other that passes through for coal bed gas.
Further, the described quantity of through hole on the same cross section of shaft of passing through for coal bed gas is two, radially over against layout, is adjacent staggered 90 ° of layouts of axis of the through hole on the cross section.
Further, described sensor is pressure sensor and/or content level sensor.
The present invention also provides a kind of pressure/content measurement while drilling method of coal bed gas, comprises the steps:
1), drives the pressure/content measurement while drilling device construction drill of described coal bed gas with rig in the position that the mining face under mine selection need be measured;
2) shut down after having bored the hole, drilling rod and rig are broken away from, then sensor is linked to each other with signal processing apparatus by lead;
3) with the outlet sealing at the rear portion of drilling rod, through behind the certain hour, by the pressure/content of sensor measurement coal bed gas.
Further, also comprise the steps:
4) outlet at the rear portion of drilling rod is opened, and make the disconnection that is connected of sensor and signal processing apparatus;
5) rig and drilling rod are reconnected, continue the degree of depth punching that to measure to the next one;
6) shut down after having bored the hole, drilling rod and rig are broken away from, again sensor is directly connected signal processing apparatus;
7) with the outlet sealing at the rear portion of drilling rod, through behind the certain hour, by the pressure/content of sensor measurement coal bed gas.
Further, described sensor is pressure sensor and/or content level sensor.
The present invention is by additional one section drilling rod that has the particular design of air-vent behind drill bit, this device is to carry out being provided with in the gas collection drilling rod corresponding sensor by the aperture that designs on the drilling rod in the drilling rod internal cavity, the signal that collects is passed to the outer signal processing apparatus of drilling rod carry out Measurement and analysis, this metering system can stop to creep into the measurement of capable coal bed gas pressure and content at any time, operate very easy, can use in the down-hole easily, can improve certainty of measurement, and Measuring Time is short, can realize with boring continuous measurement.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 is the pressure/content measurement while drilling device of a kind of coal bed gas of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
The specific embodiment
Embodiment 1:
As shown in Figure 1, the embodiment of the invention provides a kind of pressure/content measurement while drilling device of coal bed gas, comprise drilling rod 2 and drill bit 1, concentrate on the sidewall of drilling rod 2 and be provided with a plurality of through holes 21 that supply coal bed gas to pass through, this measurement mechanism also comprises sensor 3 and signal processing apparatus (not shown), sensor 3 is arranged on the shaft inside of drilling rod 2 at the rear portion of the through hole 21 that passes through for coal bed gas, and the distance of sensor 3 and drill bit 1 is greater than the distance of through hole 21 with drill bit 1.Sensor 3 is provided with connecting line 31, and wiring terminal is the plug mode, makes things convenient for wiring (lead that can utilize plug will have plug connects successively).Sensor 3 is pressure sensor and/or content level sensor.Signal processing apparatus is positioned at drilling rod 2 outsides, is used for the signal that processes sensor 3 is gathered.The through hole 21 that supplies coal bed gas to pass through is positioned at the position of close drill bit 1 on the drilling rod 2 that links to each other with drill bit 1.The quantity of through hole 21 on the same cross section of the shaft of drilling rod 2 of passing through for coal bed gas is two, radially over against layout, is adjacent the staggered 90 ° of layouts (as shown in Figure 2) of axis of the through hole 21 on the cross section.
When using, by the rig (not shown), the pressure/content measurement while drilling device of the coal bed gas that present embodiment is provided pierces in the coal seam to be measured (can select the drilling rod 2 of different joint numbers according to the different degree of depth), connect various electric circuits then, coal bed gas can enter drilling rod 2 inside by the through hole 21 that passes through for coal bed gas, sensor by being arranged on drilling rod 2 inside (gaging pressure if desired, setting pressure sensor then, measure content if desired, content level sensor then is installed, if the both need measure, two kinds of sensors then are installed), outlet sealing with drilling rod 2 rear portions, make the pressure stability of gas in the drilling rod through certain hour after, can be easily at the pressure or the content of underground survey coal bed gas.
Embodiment 2:
The embodiment of the invention provides a kind of pressure/content measurement while drilling method of coal bed gas, comprises the steps:
1),, drives the pressure/content measurement while drilling device construction drill of the coal bed gas that embodiment 1 provides with rig according to the dip angle of hole that designs, orientation, the degree of depth and aperture in the position that mining face under mine select to need is measured;
During boring, the limit makes drilling rod 2 rotations, and gases at high pressure are squeezed into toward drilling rod 2 inside in the limit, and gases at high pressure play to effluxing ickings and preventing the effect that drilling rod 2 inside enter ickings from the opening of drill bit 1 and for through hole 21 ejections that coal bed gas is passed through.
2) shut down after having bored the hole, drilling rod 2 is stopped the rotation and stop to inflate, drilling rod 2 and rig are broken away from, again the sensors 3 in the drilling rod 2 are linked by lead and signal processing apparatus.
3) with the outlet sealing of drilling rod 2,, measure the pressure and/or the content of coal bed gas by sensor 3 (pressure/content sensor) through behind the certain hour.
When needs are measured the pressure of the coal bed gas of depths more and/or content, can directly utilize last measured hole to continue to measure, also comprise the steps: this moment
4) outlet at the rear portion of drilling rod 2 is opened, and make the disconnection that is connected of sensor 3 and signal processing apparatus;
5) rig and drilling rod 2 are reconnected, continue the degree of depth punching that to measure to the next one;
6) shut down after having bored the hole, drilling rod 2 and rig are broken away from, again sensor 3 is directly connected signal processing apparatus;
7) with the outlet sealing at the rear portion of drilling rod 2,, measure the pressure/content of coal bed gas by sensor 3 through behind the certain hour.
Claims (7)
1. the pressure/content measurement while drilling device of a coal bed gas, comprise drilling rod and drill bit, it is characterized in that, concentrate on the sidewall of described drilling rod and be provided with a plurality of through holes that supply coal bed gas to pass through, described measurement mechanism also comprises sensor and signal processing apparatus, described sensor is arranged on the shaft inside at the rear portion of the through hole that passes through for coal bed gas, and described signal processing apparatus is positioned at described drilling rod outside, is used to handle the signal of described sensor acquisition.
2. the pressure/content measurement while drilling device of coal bed gas according to claim 1 is characterized in that, the position of close drill bit on the drilling rod that through hole is positioned at drill bit links to each other that described confession coal bed gas is passed through.
3. the pressure/content measurement while drilling device of coal bed gas according to claim 1, it is characterized in that, the described quantity of through hole on the same cross section of shaft of passing through for coal bed gas is two, radially over against layout, is adjacent staggered 90 ° of layouts of axis of the through hole on the cross section.
4. the pressure/content measurement while drilling device of coal bed gas according to claim 1 is characterized in that, described sensor is pressure sensor and/or content level sensor.
5. the pressure/content measurement while drilling method of a coal bed gas is characterized in that, comprises the steps:
1), drives the pressure/content measurement while drilling device construction drill of the described coal bed gas of claim 1 with rig in the position that the mining face under mine selection need be measured;
2) shut down after having bored the hole, drilling rod and rig are broken away from, then sensor is linked to each other with signal processing apparatus by lead;
3) with the outlet sealing at the rear portion of drilling rod, through behind the certain hour, by the pressure/content of sensor measurement coal bed gas.
6. the pressure/content measurement while drilling method of coal bed gas according to claim 5 is characterized in that, also comprises the steps:
4) outlet at the rear portion of drilling rod is opened, and make the disconnection that is connected of sensor and signal processing apparatus;
5) rig and drilling rod are reconnected, continue the degree of depth punching that to measure to the next one;
6) shut down after having bored the hole, drilling rod and rig are broken away from, again sensor is directly connected signal processing apparatus;
7) with the outlet sealing at the rear portion of drilling rod, through behind the certain hour, by the pressure/content of sensor measurement coal bed gas.
7. the pressure/content measurement while drilling method of coal bed gas according to claim 5 is characterized in that, described sensor is pressure sensor and/or content level sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101117017A CN101581217B (en) | 2008-05-16 | 2008-05-16 | Device and method for coal bed gas pressure/content measurement while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101117017A CN101581217B (en) | 2008-05-16 | 2008-05-16 | Device and method for coal bed gas pressure/content measurement while drilling |
Publications (2)
| Publication Number | Publication Date |
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| CN101581217A true CN101581217A (en) | 2009-11-18 |
| CN101581217B CN101581217B (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101117017A Expired - Fee Related CN101581217B (en) | 2008-05-16 | 2008-05-16 | Device and method for coal bed gas pressure/content measurement while drilling |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956541A (en) * | 2010-09-21 | 2011-01-26 | 中国石油天然气股份有限公司 | Underground switching well used for measuring, directly reading and storing coalbed methane |
| CN102003177A (en) * | 2010-09-13 | 2011-04-06 | 许进鹏 | Hydrogeological parameter observation instrument for underground single drill hole |
| CN102116170A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Method for determining grid type layer-through drilling intervals of floor roadway |
| CN102587898A (en) * | 2012-03-08 | 2012-07-18 | 中国石油天然气集团公司 | Method and device for detecting gas content of mixed fluid under while drilling condition |
| CN103643944A (en) * | 2013-11-20 | 2014-03-19 | 中国科学院力学研究所 | Pressure transferring device for testing coal seam capillary tube |
| CN107448188A (en) * | 2017-10-12 | 2017-12-08 | 中国矿业大学 | Coal-bed gas parameter measuring while drilling method and device |
| CN108896435A (en) * | 2018-07-18 | 2018-11-27 | 中煤科工集团重庆研究院有限公司 | Automatically with brill gas bearing capacity rapid determination device |
| CN110424949A (en) * | 2019-06-24 | 2019-11-08 | 中国矿业大学 | The Inversion Calculation method that coal-bed gas parameter is quickly tested with brill |
| CN113866380A (en) * | 2021-09-29 | 2021-12-31 | 中海石油(中国)有限公司 | High-coal-rank coal seam free gas content determination device and determination method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215192U (en) * | 1987-12-18 | 1988-08-31 | 湖南省煤炭科学研究所 | Device for measuring gas pressure of coal bed by drilling hole |
| CN2043755U (en) * | 1988-05-17 | 1989-08-30 | 中国矿业学院 | Measurer of conspicuous parameters of coal and gas |
| CN2556353Y (en) * | 2001-10-27 | 2003-06-18 | 崔刚明 | Drilling rod for soft coal layer high gas deep hole drilling machine |
| CN2767660Y (en) * | 2005-01-31 | 2006-03-29 | 新疆石油管理局钻井工艺研究院 | Downhole parameter gauging nipple for well plugging device for under-balanced well |
-
2008
- 2008-05-16 CN CN2008101117017A patent/CN101581217B/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003177A (en) * | 2010-09-13 | 2011-04-06 | 许进鹏 | Hydrogeological parameter observation instrument for underground single drill hole |
| CN102003177B (en) * | 2010-09-13 | 2013-01-02 | 许进鹏 | Hydrogeological parameter observation instrument for underground single drill hole |
| CN101956541B (en) * | 2010-09-21 | 2013-02-13 | 中国石油天然气股份有限公司 | Underground switching well used for measuring, directly reading and storing coalbed methane |
| CN101956541A (en) * | 2010-09-21 | 2011-01-26 | 中国石油天然气股份有限公司 | Underground switching well used for measuring, directly reading and storing coalbed methane |
| CN102116170A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Method for determining grid type layer-through drilling intervals of floor roadway |
| CN102116170B (en) * | 2011-01-27 | 2013-01-02 | 中国矿业大学 | Method for determining grid type layer-through drilling intervals of floor roadway |
| CN102587898B (en) * | 2012-03-08 | 2014-06-11 | 中国石油天然气集团公司 | Method and device for detecting gas content of mixed fluid under while drilling condition |
| CN102587898A (en) * | 2012-03-08 | 2012-07-18 | 中国石油天然气集团公司 | Method and device for detecting gas content of mixed fluid under while drilling condition |
| CN103643944A (en) * | 2013-11-20 | 2014-03-19 | 中国科学院力学研究所 | Pressure transferring device for testing coal seam capillary tube |
| CN103643944B (en) * | 2013-11-20 | 2016-08-10 | 中国科学院力学研究所 | A kind of coal seam capillary tube test pressure transfering appts |
| CN107448188A (en) * | 2017-10-12 | 2017-12-08 | 中国矿业大学 | Coal-bed gas parameter measuring while drilling method and device |
| WO2019071755A1 (en) * | 2017-10-12 | 2019-04-18 | 中国矿业大学 | Measurement-while-drilling method and device for assessing outburst risk of coal seam |
| US10947842B2 (en) | 2017-10-12 | 2021-03-16 | China University Of Mining And Technology | Measurement-while-drilling method and device for assessing outburst risk of coal seam |
| CN108896435A (en) * | 2018-07-18 | 2018-11-27 | 中煤科工集团重庆研究院有限公司 | Automatically with brill gas bearing capacity rapid determination device |
| CN110424949A (en) * | 2019-06-24 | 2019-11-08 | 中国矿业大学 | The Inversion Calculation method that coal-bed gas parameter is quickly tested with brill |
| CN110424949B (en) * | 2019-06-24 | 2021-06-22 | 中国矿业大学 | Inversion calculation method for coal bed gas parameter rapid measurement while drilling |
| CN113866380A (en) * | 2021-09-29 | 2021-12-31 | 中海石油(中国)有限公司 | High-coal-rank coal seam free gas content determination device and determination method |
| CN113866380B (en) * | 2021-09-29 | 2023-12-08 | 中海石油(中国)有限公司 | High-rank coal seam free gas content measuring device and measuring method |
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| CN101581217B (en) | 2012-08-15 |
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