CN112682100A - Coal seam is taken out down and is taken out swift drainage device of drilling - Google Patents
Coal seam is taken out down and is taken out swift drainage device of drilling Download PDFInfo
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- CN112682100A CN112682100A CN202011629011.8A CN202011629011A CN112682100A CN 112682100 A CN112682100 A CN 112682100A CN 202011629011 A CN202011629011 A CN 202011629011A CN 112682100 A CN112682100 A CN 112682100A
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- pipe
- extraction
- drainage
- borehole
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Abstract
The invention discloses a coal seam downward extraction borehole rapid drainage device which comprises an extraction component and a drainage component, wherein the extraction component comprises an extraction negative pressure pipe and an extraction pipe, the extraction negative pressure pipe is communicated with the extraction pipe, the extraction pipe is used for extracting gas in a borehole and guiding the gas into the extraction negative pressure pipe, the drainage component comprises a drainage pipe, the drainage pipe penetrates through the extraction pipe and is suitable for extending into the borehole, and the drainage pipe is used for draining accumulated water in the borehole. The quick drainage device for the coal seam downward extraction drill hole can lead out accumulated water in the drill hole in time, and has a good extraction effect.
Description
Technical Field
The invention relates to the technical field of gas extraction, in particular to a rapid drainage device for a coal seam downward extraction drill hole.
Background
In the coal mining process, downward holes need to be arranged for gas extraction of the outburst coal seam with a complex geological structure. However, in the gas extraction process, due to the adoption of wet drilling, the high water content of the coal seam and other factors, accumulated water is easily formed inside the drill hole. And the accumulated water in the drill hole can cause the reduction and even blockage of the overflowing area of the extraction pipeline, the extraction flow is reduced, the extraction resistance is increased, the extraction effect is further deteriorated, and the normal operation of the extraction device is seriously influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides the rapid drainage device for the coal seam downward extraction drill hole, which can lead out accumulated water in the drill hole in time and has a good extraction effect.
The coal seam downstream extraction borehole rapid drainage device comprises: the extraction assembly comprises an extraction negative pressure pipe and an extraction pipe, the extraction negative pressure pipe is communicated with the extraction pipe, and the extraction pipe is used for extracting gas in the drill hole and guiding the gas into the extraction negative pressure pipe; the drainage assembly comprises a drainage pipe, the drainage pipe penetrates through the extraction pipe and is suitable for extending into the drill hole, and the drainage pipe is used for draining accumulated water in the drill hole.
According to the rapid drainage device for the coal seam downward extraction drill hole, the drainage pipe penetrates through the extraction pipe and is suitable for extending into the drill hole, when accumulated water in the drill hole is large, the accumulated water in the drill hole can be drained through the drainage pipe, the timeliness of guiding out the accumulated water in the drill hole is further improved, and the extraction effect is good.
In some embodiments, the drainage assembly further comprises a water discharger, the water discharger is communicated with the drainage pipe and the extraction negative pressure pipe, and the drainage pipe is used for guiding accumulated water in the drill hole into the water discharger under the action of air pressure.
In some embodiments, the drainage assembly further comprises a drainage valve, the drainage valve is arranged on the drainage pipe, the drainage valve can be opened and closed to conduct and block the drainage pipe and the drainage pipe, the drainage valve is arranged on the drainage pipe, the drainage valve can be opened and closed to conduct and block the drainage pipe and the water discharger, the drainage pipe is communicated with the drainage pipe when the drainage valve is opened and the drainage valve is closed, and the drainage pipe, the water discharger and the drainage pipe are sequentially communicated when the drainage valve is closed and the drainage valve is opened.
In some embodiments, the coal seam downlink extraction drill hole quick drainage device further comprises a gas injection pipe and a gas injection valve, the gas injection pipe is communicated with the extraction pipe, the gas injection valve is arranged on the gas injection pipe, the gas injection valve can be opened and closed to conduct and seal the gas injection pipe and the extraction pipe, and the gas injection pipe is used for injecting gas into the drill hole so that accumulated water in the drill hole enters the water drainage device from the drainage pipe under the action of high pressure.
In some embodiments, the pipe diameter of the extraction negative pressure pipe and the pipe diameter of the gas injection pipe are larger than the pipe diameter of the extraction pipe.
In some embodiments, the extraction pipe comprises a first pipe section and a second pipe section, a first end of the first pipe section is communicated with the extraction negative pressure pipe, a second end of the first pipe section is communicated with the second pipe section, the peripheral wall of the first pipe section is suitable for contacting with the peripheral wall of the drill hole, and a plurality of extraction sieve holes penetrate through the peripheral wall of the second pipe section.
In some embodiments, a flange is arranged at one end of the extraction pipe adjacent to the extraction negative pressure pipe, and the flange is suitable for abutting against the opening of the borehole.
In some embodiments, the second end of the drainage pipe penetrates out of the extraction pipe, and the peripheral wall of the second end of the drainage pipe penetrates through a plurality of drainage sieve holes.
In some embodiments, the extraction assembly further includes a joint removably connected to the extraction pipe and/or the drain pipe.
In some embodiments, the exhaust pipe and the extraction pipe are straight pipes, and the exhaust pipe and the extraction pipe are arranged coaxially.
Drawings
Fig. 1 is a schematic diagram of a coal seam downward extraction borehole rapid drainage device according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a coal seam downstream extraction borehole rapid drainage device according to another embodiment of the invention.
Fig. 3 is a cross-sectional view a-a of fig. 2.
Reference numerals:
100. a coal seam downward extraction drill hole rapid drainage device; 200. drilling;
1. an extraction assembly; 11. extracting a negative pressure pipe; 12. extracting pipes; 121. a first tube section; 122. a second tube section; 1221. extracting sieve pores; 123. a flange; 13. an extraction valve; 14. a joint; 15. a gas injection pipe; 16. a gas injection valve;
2. a drainage assembly; 21. a drain pipe; 211. draining sieve pores; 22. a water discharger; 221. a water discharge outlet; 23. a drain valve; 24. and (4) sealing the plug.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The coal seam downward extraction borehole rapid drainage device according to the embodiment of the invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the coal seam downward extraction borehole rapid drainage device according to the embodiment of the invention comprises an extraction assembly 1 and a drainage assembly 2. The extraction assembly 1 comprises an extraction negative pressure pipe 11 and an extraction pipe 12, and the drainage assembly 2 comprises a drainage pipe 21.
As shown in fig. 1 to 3, the extraction negative pressure pipe 11 is communicated with the extraction pipe 12, the extraction pipe 12 is used for extracting gas in the borehole 200 and guiding the gas into the extraction negative pressure pipe 11, the drain pipe 21 penetrates through the extraction pipe 12 and is suitable for extending into the borehole 200, and the drain pipe 21 is used for draining accumulated water in the borehole 200.
According to the rapid drainage device for the coal seam downward extraction drill hole, the drainage pipe 21 penetrates through the extraction pipe 12 and is suitable for extending into the drill hole 200, when accumulated water in the drill hole 200 is large, the accumulated water in the drill hole 200 can be drained through the drainage pipe 21, so that the timeliness of guiding out the accumulated water in the drill hole 200 is improved, the extraction effect is good, and the installation is convenient. In addition, when the extraction negative pressure is fixed, the larger the pipe diameter of the extraction pipe 12 is, the larger the gas extraction flow rate is, so that the gas extraction efficiency of the coal seam downlink extraction borehole rapid drainage device 100 is improved.
Further, as shown in fig. 1, the drainage assembly 2 further includes a water discharger 22, the water discharger 22 is communicated with the drainage pipe 21 and the extraction negative pressure pipe 11, and the drainage pipe 21 is used for guiding accumulated water in the borehole 200 into the water discharger 22 under the action of air pressure. Optionally, a discharge outlet 221 is provided at a lower end of the discharger 22 for discharging water in the discharger 22.
In some embodiments, as shown in fig. 1 and 2, the extraction assembly 1 further includes an extraction valve 13, and the extraction valve 13 may be disposed on the extraction pipe 12 or on the extraction negative pressure pipe 11. The extraction valve 13 can be opened and closed, when the extraction valve 13 is opened, the extraction negative pressure pipe 11 is communicated with the extraction pipe 12, and when the extraction valve 13 is closed, the extraction negative pressure pipe 11 is not communicated with the extraction pipe 12.
As shown in fig. 1 and 2, the drain assembly 2 further includes a drain valve 23, and the drain valve 23 is provided on the drain pipe 21, and the drain valve 23 is openable and closable. When the drain valve 23 is opened, the drain pipe 21 communicates with the water discharger 22, and when the drain valve 23 is closed, the drain pipe 21 does not communicate with the water discharger 22.
As shown in fig. 1, when the extraction valve 13 is opened and the drainage valve 23 is closed, the extraction negative pressure pipe 11 is only communicated with the extraction pipe 12, and when the extraction valve 13 is closed and the drainage valve 23 is opened, the extraction negative pressure pipe 11, the water discharger 22 and the extraction pipe 12 are communicated in sequence.
It can be understood that, as shown in fig. 1, when the extraction valve 13 is closed and the drainage valve 23 is opened, because the extraction negative pressure pipe 11 is communicated with the water discharger 22, the drainage pipe 21 guides accumulated water in the borehole 200 into the water discharger 22 under the negative pressure action of the extraction negative pressure pipe 11, and gas extracted along with the accumulated water can enter the extraction negative pressure pipe 11 from the water discharger 22.
In other embodiments, the coal seam downward extraction borehole rapid drainage device 100 further comprises a gas injection pipe 15 and a gas injection valve 16, the gas injection pipe 15 is communicated with the extraction pipe 12, and the gas injection valve 16 is arranged on the gas injection pipe 15. The gas injection valve 16 can be opened and closed to conduct and seal the gas injection pipe 15 and the extraction pipe 12, and the gas injection pipe 15 is used for injecting gas into the drill hole 200, so that accumulated water in the drill hole 200 enters the water discharger 22 from the water discharge pipe 21 under the action of high pressure.
It can be understood that when the accumulated water in the borehole 200 needs to be drained, the extraction valve 13 is closed, the gas injection valve 16 and the drainage valve 23 are opened, and gas is introduced into the gas injection pipe 15, and the gas pressure in the borehole 200 is increased due to the tightness of the borehole 200, so that the accumulated water in the borehole 200 can be drained through the drainage pipe 21.
When no water is accumulated in the drill hole 200, gas injection into the gas injection pipe 15 is stopped, the gas injection pipe 15 is communicated with the extraction negative pressure pipe 11, namely the gas injection pipe 15 can extract gas in the drill hole 200, and therefore the extraction efficiency of the coal seam downstream extraction drill hole quick drainage device is improved.
Further, the pipe diameter of the extraction negative pressure pipe 11 and the pipe diameter of the gas injection pipe 15 are larger than the pipe diameter of the extraction pipe 12. It can be understood that as shown in fig. 2 and 3, the extraction negative pressure pipe 11, the gas injection pipe 15 and the extraction pipe 12 are all circular pipes, and the peripheral profiles of the extraction negative pressure pipe 11 and the gas injection pipe 15 are greater than that of the extraction pipe, so that the extraction efficiency of the coal seam downlink extraction borehole rapid drainage device of the embodiment of the invention is further improved. Optionally, the exhaust pipe and the extraction pipe 12 are both straight pipes, and the exhaust pipe and the extraction pipe 12 are coaxially arranged.
Optionally, a sealing plug 24 can be filled between the drainage pipe 21 and the extraction pipe 12, so that the sealing performance of the extraction pipe 12 can be improved.
In some embodiments, as shown in fig. 1 and 2, the extraction pipe 12 includes a first pipe segment 121 and a second pipe segment 122, a first end of the first pipe segment 121 (e.g., an upper end of the first pipe segment 121 in fig. 1) is in communication with the extraction sub-pressure pipe 11, a second end of the first pipe segment 121 (e.g., a lower end of the first pipe segment 121 in fig. 1) is in communication with the second pipe segment 122, a circumferential wall of the first pipe segment 121 is adapted to contact a circumferential wall of the borehole 200, and a plurality of extraction holes 1221 extend through the circumferential wall of the second pipe segment 122.
It will be appreciated that as shown in fig. 1 and 2, the peripheral wall of the first pipe section 121 is not provided with extraction holes 1221, and that only the second pipe section 122 is provided with extraction holes 1221. Cotton yarn or cement mortar or the like can be filled between the outer peripheral wall of the first pipe section 121 and the inner peripheral wall of the drill hole 200 to seal the drill hole 200, so that gas leakage in the drill hole 200 is avoided. And the second pipe section 122 rapidly extracts the gas in the borehole 200 through the plurality of extraction sieve holes 1221, so that the extraction efficiency of the coal seam downward extraction borehole rapid drainage device 100 is improved.
Further, as shown in fig. 1, one end of the extraction pipe 12 adjacent to the extraction negative pressure pipe 11 (e.g., the upper end of the extraction pipe 12 in fig. 1) is provided with a flange 123, and the flange 123 is suitable for abutting against the opening of the borehole 200, so that the situation that the borehole 200 collapses to block the extraction screen hole 1221 can be avoided.
In some embodiments, the second end of the drainage pipe 21 (e.g., the lower end of the drainage pipe 21 in fig. 1) extends through the extraction pipe 12, and the peripheral wall of the second end of the drainage pipe 21 has a plurality of drainage holes 211 extending therethrough. When the drainage pipe 21 leads out the accumulated water in the drill hole 200, the accumulated water in the drill hole 200 can be simultaneously led out through the drainage sieve holes 211, so that the drainage efficiency of the drainage pipe 21 is improved.
Further, the extraction assembly 1 also comprises a joint 14, the joint 14 being detachably connected to the extraction pipe 12 and/or the drainage pipe 21. It will be appreciated that the adapter 14 is removably connected to the drain pipe 21, or the adapter 14 is removably connected to both the extraction pipe 12 and the drain pipe 21.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a swift drainage device of coal seam drainage borehole down which characterized in that includes:
the extraction assembly comprises an extraction negative pressure pipe and an extraction pipe, the extraction negative pressure pipe is communicated with the extraction pipe, and the extraction pipe is used for extracting gas in the drill hole and guiding the gas into the extraction negative pressure pipe;
the drainage assembly comprises a drainage pipe, the drainage pipe penetrates through the extraction pipe and is suitable for extending into the drill hole, and the drainage pipe is used for draining accumulated water in the drill hole.
2. The rapid drainage device for coal seam downward extraction drill holes according to claim 1, characterized in that the drainage assembly further comprises a water drainer, the water drainer is communicated with the drainage pipe and the extraction negative pressure pipe, and the drainage pipe is used for guiding accumulated water in the drill holes into the water drainer under the action of air pressure.
3. The rapid drainage device for coal seam downward extraction drill holes according to claim 2, characterized in that the extraction assembly further comprises an extraction valve, the extraction valve is arranged on the extraction pipe and/or the extraction negative pressure pipe, the extraction valve can be opened and closed to conduct and block the extraction negative pressure pipe and the extraction pipe, the drainage assembly further comprises a drainage valve, the drainage valve is arranged on the drainage pipe, the drainage valve can be opened and closed to conduct and block the drainage pipe and the drainage device,
when the extraction valve is opened and the drain valve is closed, the extraction negative pressure pipe is communicated with the extraction pipe, and when the extraction valve is closed and the drain valve is opened, the extraction negative pressure pipe, the water discharger and the extraction pipe are sequentially communicated.
4. The coal seam downward extraction borehole rapid drainage device according to claim 2, further comprising a gas injection pipe and a gas injection valve, wherein the gas injection pipe is communicated with the extraction pipe, the gas injection valve is arranged on the gas injection pipe, the gas injection valve can be opened and closed to conduct and block the gas injection pipe and the extraction pipe, and the gas injection pipe is used for injecting gas into the borehole, so that accumulated water in the borehole enters the water drainage device from the drainage pipe under the action of high pressure.
5. The coal seam downward extraction borehole rapid drainage device according to claim 4, characterized in that the pipe diameter of the extraction negative pressure pipe and the pipe diameter of the gas injection pipe are larger than the pipe diameter of the extraction pipe.
6. The coal seam downward extraction borehole rapid drainage device according to claim 1, characterized in that the extraction pipe comprises a first pipe section and a second pipe section, a first end of the first pipe section is communicated with the extraction negative pressure pipe, a second end of the first pipe section is communicated with the second pipe section, a peripheral wall of the first pipe section is suitable for being in contact with a peripheral wall of the borehole, and a plurality of extraction sieve holes penetrate through the peripheral wall of the second pipe section.
7. The coal seam downward extraction borehole rapid drainage device according to claim 1, characterized in that one end of the extraction pipe adjacent to the extraction negative pressure pipe is provided with a flange, and the flange is suitable for abutting against an opening of the borehole.
8. The coal seam downward extraction borehole rapid drainage device according to claim 1, characterized in that a second end of the drainage pipe penetrates through the extraction pipe, and a plurality of drainage sieve holes penetrate through a peripheral wall of the second end of the drainage pipe.
9. The coal seam downward extraction borehole rapid drainage device according to claim 1, characterized in that the extraction assembly further comprises a joint, and the joint is detachably connected with the extraction pipe and/or the drainage pipe.
10. The coal seam downward extraction borehole rapid drainage device according to claim 1, characterized in that the exhaust pipe and the extraction pipe are straight pipes and are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629011.8A CN112682100A (en) | 2020-12-31 | 2020-12-31 | Coal seam is taken out down and is taken out swift drainage device of drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629011.8A CN112682100A (en) | 2020-12-31 | 2020-12-31 | Coal seam is taken out down and is taken out swift drainage device of drilling |
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| Publication Number | Publication Date |
|---|---|
| CN112682100A true CN112682100A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011629011.8A Pending CN112682100A (en) | 2020-12-31 | 2020-12-31 | Coal seam is taken out down and is taken out swift drainage device of drilling |
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Citations (6)
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| CN201521316U (en) * | 2009-10-27 | 2010-07-07 | 山西焦煤集团有限责任公司 | Coal bed down hole water draining, extracting and discharging device |
| CN102400704A (en) * | 2010-09-09 | 2012-04-04 | 淮南矿业(集团)有限责任公司 | Gas and water drainage device, system and method |
| CN102865104A (en) * | 2012-06-19 | 2013-01-09 | 淮南矿业(集团)有限责任公司 | Downward extraction drilling drainage device |
| CN105114119A (en) * | 2015-08-21 | 2015-12-02 | 贵州大学 | Improved gas extraction structure adopting downward hole drainage and implementation method thereof |
| CN107882587A (en) * | 2017-12-12 | 2018-04-06 | 贵州盘江精煤股份有限公司 | A kind of descending mash gas pumping drilling pressure wind self-draining arrangement |
| CN209494587U (en) * | 2019-01-09 | 2019-10-15 | 永城煤电控股集团有限公司 | To hole bottom hole ponding tapping equipment under one kind |
-
2020
- 2020-12-31 CN CN202011629011.8A patent/CN112682100A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201521316U (en) * | 2009-10-27 | 2010-07-07 | 山西焦煤集团有限责任公司 | Coal bed down hole water draining, extracting and discharging device |
| CN102400704A (en) * | 2010-09-09 | 2012-04-04 | 淮南矿业(集团)有限责任公司 | Gas and water drainage device, system and method |
| CN102865104A (en) * | 2012-06-19 | 2013-01-09 | 淮南矿业(集团)有限责任公司 | Downward extraction drilling drainage device |
| CN105114119A (en) * | 2015-08-21 | 2015-12-02 | 贵州大学 | Improved gas extraction structure adopting downward hole drainage and implementation method thereof |
| CN107882587A (en) * | 2017-12-12 | 2018-04-06 | 贵州盘江精煤股份有限公司 | A kind of descending mash gas pumping drilling pressure wind self-draining arrangement |
| CN209494587U (en) * | 2019-01-09 | 2019-10-15 | 永城煤电控股集团有限公司 | To hole bottom hole ponding tapping equipment under one kind |
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