CN201521316U - Coal bed down hole water draining, extracting and discharging device - Google Patents
Coal bed down hole water draining, extracting and discharging device Download PDFInfo
- Publication number
- CN201521316U CN201521316U CN 200920254290 CN200920254290U CN201521316U CN 201521316 U CN201521316 U CN 201521316U CN 200920254290 CN200920254290 CN 200920254290 CN 200920254290 U CN200920254290 U CN 200920254290U CN 201521316 U CN201521316 U CN 201521316U
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- Prior art keywords
- hole
- water
- draining
- coal bed
- tailrace
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- Expired - Lifetime
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Abstract
The utility model relates to an auxiliary device for draining methane drill hole, in particular to a coal bed down hole water draining, extracting and discharging device, which aims to resolve the problem that coal bed down hole accumulated water can not be drained timely to influence methane drainage effect. The coal bed down hole water draining, extracting and discharging device comprises a draining and extracting liquid pipe, a drill packer and a water drainage device. A first gate valve and a second gate valve are arranged on the water drainage device; a water inlet and a water drainage device ventilation bolt are arranged above the water drainage device; a water drainage bolt is arranged below the water drainage device; the upper end of the drill packer is connected to a hole connection device; the upper end of the draining and extracting liquid pipe extends into the hole connection device; a liquid guide pipe is connected between the upper end of the draining and extracting liquid pipe and the water inlet of the water drainage device; a first sunk cord pipe is arranged on one side of the hole connection device; and the second gate valve of the water drainage device is connected to a second sunk cord pipe communicated with a methane drainage pipeline. The coal bed down hole water draining, extracting and discharging device is capable of rapidly and effectively discharging out the accumulated water inside a drill, guaranteeing normal draining and extracting of the drill hole, increasing draining effect of the coal bed down hole (or down near bed drill hole), and lowering methane content of a work surface coal bed (or a down near bed), and is simple in structure and convenient in connection and operation.
Description
Technical field
The utility model relates to a kind of servicing unit of the boring that draws out methane, and is specially a kind of device for pumping and draining water from downward hole of coal bed.
Background technology
In the boring that draws out methane in hole (or following adjacent layer hole), the problem that runs into usually is exactly the ponding and the accumulated slag problem of boring under the coal seam.Because boring is towards the direction construction of going down the hill, big in the short distance owing to hydraulic pressure, the boring return slag can also be discharged with returning water, but along with the increasing of hole depth, return ability that water band slag returns out more and more a little less than, after drilling construction finishes, return slag deposits at foot of hole, can not all discharge, and ponding is full of whole boring especially, make the actual effectively extraction area of boring diminish, had a strong impact on the gas drainage under suction effect.Mainly show following two aspects to the many influences of hole ponding down to extraction.The first, make the interior coal seam of boring exposed area reduce (or petrosal foramen crack area reduces), cause extraction concentration not high; The second, ponding slowly is drawn out of for a long time in the boring, and as the timely draining of not taking measures, then ponding directly enters the gas drainage under suction pipeline, influences whole extraction system.Up to the present, though people have taked a lot of ways to come draining, effect is all not obvious.
Summary of the invention
The utility model is in order to solve under the existing coal seam in the boring that draws out methane in hole, and ponding can't in time thoroughly be discharged and be influenced the problem of gas drainage under suction effect, and a kind of device for pumping and draining water from downward hole of coal bed is provided.
The utility model is to adopt following technical scheme to realize: device for pumping and draining water from downward hole of coal bed, comprise stretch into down in boring take out liquid sucking tube and with down to the drilling and sealing device of borehole sealing installation, innovative point of the present utility model is also to comprise the tailrace which is provided with first gate valve and second gate valve, the tailrace top has water inlet and tailrace ventilation bolt, and the below is provided with the bolt that discharges water; Drilling and sealing device upper end is sealedly connected with the connection hole device that communicates with it, take out the liquid sucking tube upper end and stretch in the device of connection hole, and and the tailrace water inlet between be connected with catheter; Connection hole device one side is provided with first Sunken wire tube that an end communicates with it, the other end is communicated with first gate valve on the tailrace, is connected with second Sunken wire tube that communicates with the gas drainage under suction pipeline on second gate valve of tailrace.
In order further to optimize the structure of this extraction dewatering installation, improve its function, the utility model has also carried out following structure design, has sieve aperture on the described tube wall of taking out the liquid sucking tube end; Run through in the device of described hole that the connection short tube being set, connect upper end of short tube and be provided with the snap joint that is connected with catheter, connection short tube lower end with take out liquid sucking tube and be connected; Described first Sunken wire tube is provided with connection hole device ventilation bolt with the junction of connection hole device.
Adopt structure design of the present utility model, its operating principle and performance characteristics are as follows:
1, intact, the preceding draining of access extraction system of drilling construction
The liquid sucking tube of taking out in this dewatering installation is extend into (can not patchhole prodelta clay slag in) at the bottom of the boring hole, utilize in pipe negative pressure, atmospheric pressure and the hole gas pressure that ponding is extracted out from catheter, flow in the tailrace, after treating that tailrace water is completely emitted, draw water, discharge water according to said method again, till ponding exhausts in the hole.Use this dewatering installation before the intact access of drilling construction extraction, ponding is very fast in the evacuation aperture, can discharge 0.05m according to measuring and calculating in 10 minutes
3Therefore ponding can solve boring ponding problem in the short time;
2, the draining in the extraction process
After boring inserts the extraction system, utilize gas pressure in pipe negative pressure and the hole that the taking out in the liquid sucking tube of (can not patchhole prodelta clay slag) at the bottom of extend into the boring hole of the normal infiltration in coal (rock) layer extracted out, the water of extracting out flow in the tailrace through catheter, often tailrace is discharged water, in boring extraction process, be in normal hull-borne with holding device.In extraction, continue to use this device, the residual accumulated water of extracting out in coal (rock) body around the boring can be discharged with prestissimo, guaranteed effective extraction of boring.
Compared with prior art, the utility model is realized the ponding in the discharging extraction borehole under the situation that does not influence normal extraction, ponding is quick in will holing, effectively discharge, thereby guarantee the normal extraction of boring, and install and manage more convenient, can reuse simultaneously, can effectively improve the go down the hill extraction effect in hole (or down adjacent layer boring) of this coal seam, reduce this coal seam of work plane (or following adjacent layer) gas bearing capacity thereby reach, reduce the gas emission in the working face extraction process, guaranteed the smooth back production of work plane safety, made work plane realize high-yield and high-efficiency, significant, and it is simple in structure, easy to connect, be convenient to operation, can be widely used in the go down the hill extraction in hole of this coal seam, the extraction in following adjacent layer hole (bottom plate hole).
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing at A place among Fig. 1;
Fig. 3 is the partial enlarged drawing at B place among Fig. 1;
Among the figure: under the 1-to boring; 2-takes out liquid sucking tube; 3-drilling and sealing device; 4-first gate valve; 5-second gate valve; The 6-tailrace; The 7-water inlet; 8-tailrace ventilation bolt; The 9-bolt that discharges water; 10-connection hole device; The 11-catheter; 12-first Sunken wire tube; 13-gas drainage under suction pipeline; 14-second Sunken wire tube; The 15-sieve aperture; 16-connects short tube; 17-snap joint; 18-connection hole device ventilation bolt; The 19-pipe close; 20-connects the tip; The 21-flange.
The specific embodiment
Device for pumping and draining water from downward hole of coal bed, as shown in Figure 1, comprise stretch into down to boring in 1 take out liquid sucking tube 2 and with down to the drilling and sealing device 3 of borehole sealing installation, as shown in Figure 2, take out on the tube wall of liquid sucking tube 2 ends and have sieve aperture 15, take out liquid sucking tube and can be the pvc pipe that diameter is 15mm.Also comprise the tailrace 6 which is provided with first gate valve 4 and second gate valve 5, tailrace 6 tops have water inlet 7 and tailrace ventilation bolt 8, and the below is provided with the bolt 9 that discharges water; Drilling and sealing device 3 upper ends are sealedly connected with the connection hole device 10 that communicates with it, both can connect by flange, taking out liquid sucking tube 2 upper ends stretches in the connection hole device 10, and and be connected with catheter 11 between the tailrace water inlet 7, diameter is 10mm, runs through to be provided with in the connection hole device 10 to connect short tube 16, connects short tube and can be the irony pipe that diameter is 15mm, connecting short tube 16 upper ends be the snap joint 17 that is connected with catheter 11, connection short tube 16 lower ends with take out liquid sucking tube 2 and be connected; Connection hole device 10 1 sides are provided with first Sunken wire tube 12 that an end communicates with it, the other end is communicated with first gate valve 4 on the tailrace, first Sunken wire tube can be connected the tip 20 by connecting with connection hole device, be connected with second Sunken wire tube, 14, the first Sunken wire tubes 12 that communicate with gas drainage under suction pipeline 13 and the junction that joins hole device 10 on second gate valve 5 of tailrace and be provided with connection hole device ventilation bolt 17.
During concrete enforcement, can carry out according to the following steps:
1, boring inserts the preceding pre-draining of extraction system
1. with at the bottom of the taking out liquid sucking tube and extend into the boring hole in this dewatering installation (determine pipe number in the patchhole according to hole depth, but tube head can not patchhole prodelta clay slag in).
2. after extraction liquid tube head arrives the bottom, hole, will join the hole device in the aperture and take out liquid sucking tube to connecting, it is good by the flange connection in aperture and hole packer to join the hole device, then will
Catheter and tailrace water inlet are connected.Close first gate valve on the tailrace at last, make that first Sunken wire tube and the tailrace on the device of connection hole disconnects.
3. open second gate valve on the tailrace, negative pressure is introduced in the tailrace, make
" PVC takes out liquid sucking tube and produces negative pressure catheter and 4, and under the atmospheric acting in conjunction of negative pressure and tunnel, ponding is sucked by the bottom, hole and takes out in liquid sucking tube and the catheter in the hole, arrives in the tailrace at last.
When treating that 4. water will be expired in the tailrace, close second gate valve on the tailrace, turn on the tailrace ventilation bolt and the bolt that discharges water, water in the tailrace is drained, will ventilate the at last bolt and the bolt that discharges water are twisted by original position.
5. repeat 3. and the anhydrous sucking-off in the hole of operation 4., again ponding in the tailrace is all drained.
2, the draining after the boring access extraction system
1. close second gate valve on the tailrace, first Sunken wire tube and connection hole device are connected.
2. open first gate valve and second gate valve on the tailrace, make to take out in liquid sucking tube and catheter and the whole boring to be full of negative pressure, the extraction of boring connecting system.The ponding that produces in the extraction process is assembled at the bottom of the hole, can continue to flow in the tailrace along taking out liquid sucking tube and catheter.
When 3. ponding will be expired in observing tailrace, close second gate valve, turn on tailrace ventilation bolt, the bolt that discharges water, connection hole device ventilation bolt, water in the tailrace is drained, will ventilate the at last bolt and the bolt that discharges water are twisted by original position.
4. open second gate valve on the tailrace, will hole and continue the connecting system extraction.
5. the operation that repeats 2., 3. and does not 4. have the ponding discharge again in the hole.
In order further to prove the practical application effect of this dewatering installation, the applicant has carried out following practical proof:
1, under 10509 work planes in adjacent layer (bottom plate hole) extraction, the dip angle of hole of being tested is-45 ° and-60 °; Hole depth is respectively 25m and 32m; The aperture is 94mm.Before boring inserted extraction, when negative pressure was 37.5KPa, the ponding that uses this device to discharge the boring of 25m hole depth reached 23m, amounts to 35 minutes times spent; The ponding of discharging the boring of 32m hole depth reaches 30m, amounts to 45 minutes times spent; Boring inserts extraction does not have ponding substantially after 2 days;
Do not use the boring of this device to compare with adjacent, after this device draining, boring extraction concentration has obviously improved 5%～10%, and the extraction flow improves 0.1～1m
3/ min.
2, in this coal seam extraction of 18307 work planes, the dip angle of hole of being tested is-3 °, and hole depth is 120m, and the aperture is 113mm.Boring when negative pressure is 28.6KPa, uses this device to discharge the ponding of 115m hole depth before inserting extraction; Amount to 3.8 hours times spent, boring inserts extraction does not have ponding substantially after 10 days.
Do not use the boring of this device to compare with adjacent, after this device draining, boring extraction concentration has obviously improved 10%～15%, and the extraction flow improves 0.1～1m
3/ min.
In sum, this device draining fast solves boring ponding problem in the short time, have good effect.
Claims (4)
1. device for pumping and draining water from downward hole of coal bed, comprise stretch into down to boring in (1) take out liquid sucking tube (2) and with down to the drilling and sealing device (3) of borehole sealing installation, it is characterized in that also comprising the tailrace (6) which is provided with first gate valve (4) and second gate valve (5), tailrace (6) top has water inlet (7) and tailrace ventilation bolt (8), and the below is provided with the bolt that discharges water (9); Drilling and sealing device (3) upper end is sealedly connected with the connection hole device (10) that communicates with it, take out liquid sucking tube (2) upper end and stretch in the connection hole device (10), and and tailrace water inlet (7) between be connected with catheter (11); Connection hole device (10) one sides are provided with first Sunken wire tube (12) that an end communicates with it, the other end is communicated with first gate valve (4) on the tailrace, are connected with second Sunken wire tube (14) that communicates with gas drainage under suction pipeline (13) on second gate valve (5) of tailrace.
2. device for pumping and draining water from downward hole of coal bed according to claim 1 is characterized in that taking out on the terminal tube wall of liquid sucking tube (2) and has sieve aperture (15).
3. device for pumping and draining water from downward hole of coal bed according to claim 1 and 2, it is characterized in that joining running through in the hole device (10) to be provided with and connect short tube (16), connect short tube (16) upper end and be provided with the snap joint (17) that is connected with catheter (11), connection short tube (16) lower end with take out liquid sucking tube (2) and be connected.
4. device for pumping and draining water from downward hole of coal bed according to claim 1 and 2 is characterized in that first Sunken wire tube (12) and the junction of connection hole device (10) are provided with connection hole device ventilation bolt (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920254290 CN201521316U (en) | 2009-10-27 | 2009-10-27 | Coal bed down hole water draining, extracting and discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920254290 CN201521316U (en) | 2009-10-27 | 2009-10-27 | Coal bed down hole water draining, extracting and discharging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201521316U true CN201521316U (en) | 2010-07-07 |
Family
ID=42507493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920254290 Expired - Lifetime CN201521316U (en) | 2009-10-27 | 2009-10-27 | Coal bed down hole water draining, extracting and discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201521316U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699033B (en) * | 2009-10-27 | 2011-12-21 | 山西焦煤集团有限责任公司 | Device for pumping and draining water from downward hole of coal bed |
| CN102900429A (en) * | 2012-09-27 | 2013-01-30 | 淮南矿业(集团)有限责任公司 | Device and method for inspecting gas drainage hole tightness |
| CN103711519A (en) * | 2013-12-30 | 2014-04-09 | 南车资阳机车有限公司 | Drainage method for gas pipeline of gas power station in operation |
| CN104612748A (en) * | 2015-02-04 | 2015-05-13 | 张丽军 | Coal-mass gas extraction method and device |
| CN107882586A (en) * | 2017-12-12 | 2018-04-06 | 贵州盘江精煤股份有限公司 | Water-bound and its construction method are blown in a kind of coal mine gas extraction |
| CN112682100A (en) * | 2020-12-31 | 2021-04-20 | 煤炭科学技术研究院有限公司 | Coal seam is taken out down and is taken out swift drainage device of drilling |
-
2009
- 2009-10-27 CN CN 200920254290 patent/CN201521316U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699033B (en) * | 2009-10-27 | 2011-12-21 | 山西焦煤集团有限责任公司 | Device for pumping and draining water from downward hole of coal bed |
| CN102900429A (en) * | 2012-09-27 | 2013-01-30 | 淮南矿业(集团)有限责任公司 | Device and method for inspecting gas drainage hole tightness |
| CN103711519A (en) * | 2013-12-30 | 2014-04-09 | 南车资阳机车有限公司 | Drainage method for gas pipeline of gas power station in operation |
| CN104612748A (en) * | 2015-02-04 | 2015-05-13 | 张丽军 | Coal-mass gas extraction method and device |
| CN107882586A (en) * | 2017-12-12 | 2018-04-06 | 贵州盘江精煤股份有限公司 | Water-bound and its construction method are blown in a kind of coal mine gas extraction |
| CN112682100A (en) * | 2020-12-31 | 2021-04-20 | 煤炭科学技术研究院有限公司 | Coal seam is taken out down and is taken out swift drainage device of drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100707 Effective date of abandoning: 20091027 |