CN87215192U - Device for measuring gas pressure of coal bed by drilling hole - Google Patents
Device for measuring gas pressure of coal bed by drilling hole Download PDFInfo
- Publication number
- CN87215192U CN87215192U CN198787215192U CN87215192U CN87215192U CN 87215192 U CN87215192 U CN 87215192U CN 198787215192 U CN198787215192 U CN 198787215192U CN 87215192 U CN87215192 U CN 87215192U CN 87215192 U CN87215192 U CN 87215192U
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- pressure
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- hole
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Abstract
The utility model discloses a method and device for measuring gas pressure of coal bed by drilling hole in the geological exploration, belonging to the testing technique category of the geological exploration. The utility model provides a technical approach and an assay method for measuring the original occurrence pressure of the coal bed gas directly in the drilling process of the geological exploration and provides a device matched with this method. First, the drill hole is packed, and the interference of the fluid medium in the drill hole is expelled. Then, the mud pressure is unloaded to create the condition for the gas pressure brought into play alone. Finally, the device is used to measure the gas pressure and the change curve of the gas pressure. Use this method and device can provide accurate and reliable gas parameter to the design and construction of the mine, so the utility model is an indispensable technology and device in the coal exploration.
Description
The invention belongs to geological prospecting measuring technology category.
Coal-bed gas pressure 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.Known method about geological stages acquisition coal-bed gas pressure is to adopt analytic method to determine indirectly, promptly in carrying out, exploration gathers the coal sample in tested coal seam in good time, by measuring resolution speed and a series of laboratory work of gas in the coal, obtain this seam gas content earlier, and then calculate coal-bed gas pressure (calling indirect method in the following text) by the characteristic constant of gas bearing capacity and coal.Or build after the ore deposit, coal-bed gas pressure (calling the mine method in the following text) is measured in punching in the roadway of colliery.
The technological process that indirect method adopts is very long, and field condition is widely different, and the auxiliary parameter of requirement is a lot, thereby cumulative errors are very big, is difficult to obtain coal-bed gas pressure value accurately.And the mine method needs ore deposit yet to be built just to have ready conditions later on to carry out, lost the effect as the mine design foundation to a great extent.And the original tax that shaft building and pressure measurement work progress destroy coal-bed gas easily deposits situation, thereby also is difficult to obtain more original gas pressure, and And and measure data in this case and often need a couple of days even tens of days spends a large amount of labours.
The objective of the invention is in order to solve the technological approaches that pressure is deposited in the original tax of directly measuring coal-bed gas at geological prospecting borehole, proposed directly when boring, to measure the device of gas pressure.
Concrete solution is: after exploratory bore-hole penetrates or pass tested coal seam, at first in the direct topped roof strata in this coal seam packing is carried out in boring, got rid of the interference of upper bore inner fluid medium to measured layer; Then the mud artesian condition in this coal bed drilling is given removal, create the condition that coal supply layer gas pressure had an effect separately.Under above-mentioned precondition, utilize pressure measuring instruments to measure boring coal-bed gas pressure or its change curve.
This geological prospecting borehole determination of coal seam gas pressure device is made up of four parts such as packing device, pressure relief device, pressure gauge, supporting and regulating devices.
Accompanying drawing has been described one embodiment of the present of invention.
Accompanying drawing 1: the method schematic diagram of coal-bed gas pressure is measured in exploratory bore-hole.
Accompanying drawing 2: the longitudinal sectional drawing of exploratory bore-hole determination of coal seam gas pressure device.
Fig. 1 has shown the process of pressure testing method.Wherein (a) expression pressure tester is put to boring to be measured (2) by drilling rod (1), makes packing device (3) be in the better position of immediate roof hole wall in tested coal seam (7) by supporting and regulating device (6).(b) the expression packer carries out packing to boring (2).(c) show after the release, measured medium (8) enters the situation of the pressure relief device (4) of determinator inside, and pressure gauge (5) will reflect the change procedure and the numerical value of gas pressure.
Fig. 2 is the structure longitudinal sectional drawing of exploratory bore-hole determination of coal seam gas pressure device of the present invention, and this device is by packing device (3), and 4 parts such as pressure relief device (4), pressure gauge (5) and supporting and regulating device (6) are formed.
Packing device (3) by male joint (9), unload stream valve (10), retracting cylinder (14) and compressible hole sealing glue cartridge is formed.Male joint (9) is a hollow, and there is tapered thread its upper end, can link with the drilling rod (1) of rig during use, the lower end with unload stream valve (10) and connect, unload to flow in the valve (10) and spool (11) is housed, unloads and flow pin (12), valve plug (13).Compressible hole sealing glue cartridge, elder generation connects the lower end of core pipe (18) with lower union joint (23) when assembling, with sealing of hole packing element (19), (20), (21) and dividing plate (22) be enclosed within successively respectively on the core pipe (18), then upper binding head (16) also is set on the core pipe (18), cover nut (15), to cut off pin (17) and squeeze into the lead to the hole site of upper binding head (16) and core pipe (18), the retracting cylinder (14) of screwing at last will unload stream valve (10) and upper binding head (16) connects, and makes packing device become a unified integral body.
Its urceolus of pressure relief device (4) by the piston-cylinder (24) that connects successively, unload pressure cylinder (28), sludge barrel (32), sludge barrel joint (33) outward and form, inside it fuse by piston rod (25), back lash spring (26), pressure gauge joint (27), in unload pressure cylinder (30) and form; Pressure gauge joint (27) upper end and in unload pressure cylinder (30) and connect with alignment pin (29), non-return jump ring (31) also is equipped with in pressure gauge joint bottom.Be drilled with through hole (37) and (36) in inside and outside a certain appropriate location of unloading pressure cylinder (28), (30), this installs, and two holes are not connected under idle situation.
Pressure gauge (5) is connected on the pressure gauge joint (27), unloads outside being installed in the cavity that is isolated from the outside of pressure cylinder (28), sludge barrel (32) and sludge barrel joint (33) composition.
Supporting and regulating device (6) is made up of one or some supports drill rods that is coupled to each other (34) and supporting member (35).The upper end of supports drill rods (34) and sludge barrel joint (33) link, its radical and length, and the position, coal seam that can optionally measure and the requirement of sealing of hole are regulated.
When using this device, at first male joint (9) is inserted the drilling rod (1) of rig, device is sent into detected part in the boring, suitably choose the length of the supports drill rods (34) between sludge barrel connector (33) and the supporting member (35), guarantee that sealing of hole packing element (19), (20), (21) are in the complete place of hole wall of coal seam immediate roof.Be against at the bottom of the boring hole owing to support (35), and drilling tool weight is enough big, makes and cut off pin (17) and cut off, at this moment drilling tool weight is then successively pressed expand sealing of hole packing element (19), (20), (21), makes packing element be close to hole wall, and the top and the bottom packing of will holing is come.
At this moment send into pressure mud or clear water by drilling rod (1) hollow part, the compressing spool (11) make unload stream pin (12) cut off, pressure mud or clear water are by the cavity access to plant Nei Bu And compression piston bar (25) of valve plug (13), core pipe (18), promotion inside is unloaded pressure cylinder (30) and is moved down, unload interior accessibke porosity (36), (37) alignment on pressure cylinder (28), (30) inside and outside making, at this moment the outer pressure-bearing mud of pressure tester flows into the sludge barrel in the pressure tester, the pressure tester internal and external pressure balance is finished the release effect.And meanwhile, coal-bed gas also will enter the sludge barrel inner chamber by the interior accessibke porosity that has alignd, and just can experience the change And of gas pressure pressure history is noted by inserting wherein pressure gauge (5), reach the purpose of pressure measurement.
Claims (1)
1, a kind of geological prospecting borehole determination of coal seam gas pressure device is characterized in that it is made up of packing device, pressure relief device, pressure gauge, supporting and regulating device.
Packing device [3] by the male joint that links successively, unload stream valve, retracting cylinder and compressible hole sealing glue cartridge etc. and form, male joint is a hollow, its upper end has Zhui shape Wai Luo Wen And to link with the drilling rod of rig, the lower end with unload stream valve connect, unload in the stream valve spool, valve plug be housed, unload stream pin etc.
Compressible hole sealing glue cartridge by core pipe, upper and lower connector, several sealing of hole packing elements, dividing plate, cut off pin etc. and form,
The urceolus of pressure relief device by the piston-cylinder that connects successively, unload pressure cylinder, sludge barrel, sludge barrel joint outward and form, its the inside fuse by piston rod, back lash spring, pressure gauge joint, in unload pressure cylinder and form, the pressure gauge joint and in unload pressure cylinder and be connected and fixed with alignment pin, in unload the pressure cylinder lower end non-return jump ring also be housed, unload inside and outside that each one is drilled with through hole [36], [37] on the pressure cylinder, the two through hole position is not up and down (not being connected) of staggering when device is not worked
Pressure gauge is connected on the pressure gauge joint, outside being installed in, unloads And in the cavity that is isolated from the outside of pressure cylinder, sludge barrel and sludge barrel joint composition,
Supporting and regulating device is made up of one or some supports drill rods that is coupled to each other and supporting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198787215192U CN87215192U (en) | 1987-12-18 | 1987-12-18 | Device for measuring gas pressure of coal bed by drilling hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198787215192U CN87215192U (en) | 1987-12-18 | 1987-12-18 | Device for measuring gas pressure of coal bed by drilling hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87215192U true CN87215192U (en) | 1988-08-31 |
Family
ID=4829370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198787215192U Withdrawn CN87215192U (en) | 1987-12-18 | 1987-12-18 | Device for measuring gas pressure of coal bed by drilling hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87215192U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121376A (en) * | 2010-01-11 | 2011-07-13 | 河南理工大学 | Intelligent coal seam gas pressure tester |
| CN101315024B (en) * | 2008-07-09 | 2012-01-11 | 中国地质大学（武汉） | Jackrod one-way pump injection type sealing/sealing releasing device for hole-inside base |
| CN102383781A (en) * | 2011-07-15 | 2012-03-21 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN101581217B (en) * | 2008-05-16 | 2012-08-15 | 中国科学院力学研究所 | Device and method for coal bed gas pressure/content measurement while drilling |
| CN101581218B (en) * | 2008-05-16 | 2012-09-05 | 中国科学院力学研究所 | Device and method for convenient measurement while drilling of coal bed gas parameters |
| CN101446193B (en) * | 2008-12-12 | 2012-10-24 | 中国矿业大学 | Device and method for detecting coal seam gas pressure and coal wall stress |
| CN101775980B (en) * | 2010-01-18 | 2012-12-26 | 大同煤矿集团轩岗煤电有限责任公司 | Quick drainage and hole sealing gas parameter testing system |
| CN101440707B (en) * | 2008-12-19 | 2013-03-06 | 中国矿业大学 | Coal-bed gas pressure measuring instrument and measuring method thereof |
| CN107238458A (en) * | 2017-07-27 | 2017-10-10 | 中国科学院武汉岩土力学研究所 | Dry hole relief valve and hydrofracturing detecting earth stress device |
| CN111677495A (en) * | 2020-05-08 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Coal mine underground directional drilling gas measurement while drilling device, drilling tool and measurement method |
-
1987
- 1987-12-18 CN CN198787215192U patent/CN87215192U/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581217B (en) * | 2008-05-16 | 2012-08-15 | 中国科学院力学研究所 | Device and method for coal bed gas pressure/content measurement while drilling |
| CN101581218B (en) * | 2008-05-16 | 2012-09-05 | 中国科学院力学研究所 | Device and method for convenient measurement while drilling of coal bed gas parameters |
| CN101315024B (en) * | 2008-07-09 | 2012-01-11 | 中国地质大学（武汉） | Jackrod one-way pump injection type sealing/sealing releasing device for hole-inside base |
| CN101446193B (en) * | 2008-12-12 | 2012-10-24 | 中国矿业大学 | Device and method for detecting coal seam gas pressure and coal wall stress |
| CN101440707B (en) * | 2008-12-19 | 2013-03-06 | 中国矿业大学 | Coal-bed gas pressure measuring instrument and measuring method thereof |
| CN102121376B (en) * | 2010-01-11 | 2013-11-27 | 河南理工大学 | Intelligent coal seam gas pressure tester |
| CN102121376A (en) * | 2010-01-11 | 2011-07-13 | 河南理工大学 | Intelligent coal seam gas pressure tester |
| CN101775980B (en) * | 2010-01-18 | 2012-12-26 | 大同煤矿集团轩岗煤电有限责任公司 | Quick drainage and hole sealing gas parameter testing system |
| CN102383781A (en) * | 2011-07-15 | 2012-03-21 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN102383781B (en) * | 2011-07-15 | 2014-01-08 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN107238458A (en) * | 2017-07-27 | 2017-10-10 | 中国科学院武汉岩土力学研究所 | Dry hole relief valve and hydrofracturing detecting earth stress device |
| CN111677495A (en) * | 2020-05-08 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Coal mine underground directional drilling gas measurement while drilling device, drilling tool and measurement method |
| 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 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |