CN102135011A - Device for pumping coal bed gas through underground radial drilling - Google Patents
Device for pumping coal bed gas through underground radial drilling Download PDFInfo
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- CN102135011A CN102135011A CN2011100379724A CN201110037972A CN102135011A CN 102135011 A CN102135011 A CN 102135011A CN 2011100379724 A CN2011100379724 A CN 2011100379724A CN 201110037972 A CN201110037972 A CN 201110037972A CN 102135011 A CN102135011 A CN 102135011A
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- underground
- hole
- flexible pipe
- coal
- pressure injection
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- 239000003245 coal Substances 0.000 title claims abstract description 57
- 238000005553 drilling Methods 0.000 title abstract description 10
- 238000005086 pumping Methods 0.000 title abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 abstract description 8
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000002893 slag Substances 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 39
- 238000000605 extraction Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 238000005065 mining Methods 0.000 description 6
- 239000003818 cinder Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000005021 gait Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention discloses a device for pumping coal bed gas through underground radial drilling, which comprises a high-pressure pump group, a hydraulic drive roller, a high-pressure injection hose, a hose guide pipe, an underground eccentric guide shoe, a jet nozzle, a screw pump and a screw pump driving device, and is characterized in that: two channels are formed in the underground eccentric guide shoe, a main channel is connected with an oil pipe to timely pump coal slag generated by underground jet cutting, construction solution and water contained in a coal bed out of a well head in the injection process, and the other eccentric channel is connected with the hose guide pipe; and the high-pressure injection hose enters the hose guide pipe through a side wing opening of a casing head so as to enter the eccentric channel of the underground eccentric guide shoe which makes the high-pressure injection hose turn to a horizontal state from a vertical state. The device meets the requirement of pumping underground residual coal slag, the construction solution and the water contained in the coal bed simultaneously in an underground radial horizontal drilling process and the injection process.
Description
Technical field: the present invention relates to the coal-bed gas exploitation technical field, the particularly device of colliery down-hole pump drainage coal bed gas is specially the device of a kind of down-hole radial bore pump drainage coal bed gas.
Background technology: radial bore is to grow up on the basis of conventional levels well, directly finishes in the peupendicular hole pit shaft by vertically to the turning to of horizontal direction by downhole tool, utilizes jet nozzle to carry out the new technology of radial level boring simultaneously.
Coal bed gas is to be stored in the lip-deep a kind of fuel gas of matrix of coal with composing with the Molecular Adsorption state of coal association in colliery layer and contiguous rock stratum thereof, and its main component (often accounting for more than 90%) is methane (CH
4), be commonly called as " gas ".The coal bed gas that is commonly called as gas is the strong greenhouse gas that causes the outstanding disastrous gas of coal mine gas from explosion, coal and rock and cause global warming, and it also is a kind of new forms of energy of cleaning simultaneously.
China's geological tectonic conditions complexity contains gas ratio height in the colliery, wherein high gas and the mine that has gas to give prominence to account for more than 46%.Along with mine constantly extends the increasing of adopting and exploiting scale to the deep, the gas disaster is more serious, and obviously, gas has become the key factor that threatens the safe and efficient production of coal in China.In Coal Production, generally take the method for bleeding earlier and afterwards mining, utilize the short as far as possible time fast and effeciently to reduce gas bearing capacity in coal seam and the country rock before promptly mining, make the mine of high gas originally change the mine of present low gas into, set up the essential safe type colliery, control gas disaster ensures the safe coal High-efficient Production.
Because the characteristic of the low pressure of China's gassy seam, hypotonic, low adsorbed gas saturation ratio, difficulty is all compared in original coal body gas drainage under suction under ground drilling extraction and the coal mine, in order to improve the extraction effect of gas, must promote cracks in coal seam to grow, to increase the gas permeability of coal (rock) layer.In the coal mine underground gas borehole extraction was administered, according to the arrangement of boring, common methods mainly contained: high-order hole pumping and mining, this coal seam (along layer) hole pumping and mining and layer-through drilling extraction etc.Wherein along coal bed drilling, owing to there is not invalid drilling depth, the boring drilling depth is few, and speed of fulfiling hole is fast, and extraction is effective, so if execution conditions are used as the job practices of first-selected pre-gas pumping boring when allowing.At present, coal bed gas under the horizontal well extraction well, the main negative pressure extracting coal bed gas that adopts, the recovery ratio of coal bed gas is lower, because the drilling depth of horizontal eyelet is limited, and the scope of extraction also is subjected to certain influence, form the coal-bed gas exploitation blank tape at the middle part in exploiting field easily simultaneously, wasted a large amount of coal bed gas resources, also stayed construction hidden danger simultaneously for the later stage coal mining.
Summary of the invention: the technical problem to be solved in the present invention provides the device of a kind of down-hole radial bore pump drainage coal bed gas.
The objective of the invention is needs according to pre-extraction coal bed gas before the down-hole coal excavation, take out at down-hole, mining area height and to utilize peupendicular hole to form the radial radial level boring of multi-section multi-layer in the lane in the coal seam section, increase the exposed area in coal seam, simultaneously by boring slotted hole in the coal seam section, can increase the release scope of boring, strengthen the radius of influence of boring, increase boring pump drainage coal seam tolerance, thereby improve the pump drainage effect of boring.
In order to realize the foregoing invention purpose, the invention provides the device of a kind of down-hole radial bore pump drainage coal bed gas, mainly lead footwear, jet nozzle, screw pump and driving unit on screw pump and form by high-pressure pump group, hydraulic-driven cylinder, high-pressure injection flexible pipe, flexible pipe guide pipe, down-hole off-centre.The high-pressure pump group is connected with the high-pressure injection flexible pipe by swivel joint, the other end of high-pressure injection flexible pipe is connected to jet nozzle, the high-pressure injection flexible pipe is wrapped on the hydraulic-driven cylinder, can control the gait of march of high-pressure injection flexible pipe by the linear velocity of regulating the hydraulic pressure head roll, screw pump is connected on down-hole off-centre and leads the footwear bottom, by driving unit on screw pump drive screw pump work, to satisfy the cinder that in course of injection, in time jet cutting in down-hole is produced, construction liquid and the moisture pump drainage in coal seam go out well head, down-hole off-centre is led two passages in the footwear, the main channel is connected with oil pipe, oil pipe upper end connecting screw rod pump drive, another eccentric channel is connected with the flexible pipe guide pipe, the high-pressure injection flexible pipe enters the flexible pipe guide pipe by casing head flank mouth, thereby entering down-hole off-centre leads in the eccentric channel of footwear, the eccentric channel that down-hole off-centre is led in the footwear provides the high-pressure injection flexible pipe from the vertical duction level, thereby realizes radial level boring.
Compare with the existing underground gas borehole extraction mode in colliery, beneficial effect of the present invention is:
1, the length of radial bore of the present invention can reach 50-100m, and each interval can creep into a plurality of horizontal eyelets, takes out number and the number of boring, shortening construction period and the saving construction cost that the lane drill site is arranged thereby can reduce the down-hole height.
2, the present invention can make low coal bed gas ventilative, weak seam effectively be exploited, and when implementing radial bore, utilizes the pump drainage function of screw pump in time cinder, construction liquid and the moisture pump drainage in coal seam of down-hole jet cutting generation to be gone out well
Mouthful, keep that liquid level is in below the coal seam all the time in the pit shaft, to reduce head of liquid in the pit shaft to the influence of coal bed texture with prevent caving in of radial hole.
3, the present invention transfers to the coal bed gas extraction that with safety is purpose to utilize coal bed gas resource being the pump drainage of purpose, having reached the purpose that coal and coal bed gas are adopted altogether.
Description of drawings:
Fig. 1 is a radial bore apparatus structure schematic diagram of the present invention;
Wherein (1) is the high-pressure pump group, and (2) are the hydraulic-driven cylinder, and (3) are the high-pressure injection flexible pipe, and (4) are the flexible pipe guide pipe, and (5) lead footwear for down-hole off-centre, and (6) are jet nozzle, and (7) are screw pump, and (8) are driving unit on screw pump;
Fig. 2 leads footwear for the down-hole off-centre of Fig. 1, and wherein 51 is the main channel;
Fig. 3 be the A-A of Fig. 2 to sectional drawing, wherein 52 is eccentric channel.
The specific embodiment: the concrete structure of describing the device of a kind of down-hole radial bore pump drainage coal bed gas proposed by the invention below in conjunction with accompanying drawing in detail.The present invention includes high-pressure pump group (1), hydraulic-driven cylinder (2), high-pressure injection flexible pipe (3), flexible pipe guide pipe (4), down-hole off-centre and lead footwear (5), jet nozzle (6), screw pump (7), driving unit on screw pump (8).High-pressure pump group (1) is connected with high-pressure injection flexible pipe (3) by swivel joint, the other end of high-pressure injection flexible pipe (3) is connected to jet nozzle (6), high-pressure injection flexible pipe (3) is wrapped on the hydraulic-driven cylinder (2), can control the gait of march of high-pressure injection flexible pipe (3) by the linear velocity of regulating hydraulic pressure head roll (2), screw pump (7) is connected on down-hole off-centre and leads footwear (5) bottom, work by driving unit on screw pump (8) drive screw pump (7), to satisfy the cinder that in course of injection, in time jet cutting in down-hole is produced, construction liquid and the moisture pump drainage in coal seam go out well head, down-hole off-centre is led two passages in the footwear (5), main channel (51) is connected with oil pipe, oil pipe upper end connecting screw rod pump drive (8), another eccentric channel (52) is connected with flexible pipe guide pipe (4), high-pressure injection flexible pipe (3) enters flexible pipe guide pipe (4) by casing head flank mouth, lead in the eccentric channel of footwear (52) thereby enter down-hole off-centre, the eccentric channel (52) that down-hole off-centre is led in the footwear (5) provides the high-pressure injection flexible pipe from the vertical duction level.
The down-hole off-centre that the bottom is connected to screw pump (7) by oil pipe is led footwear (5) and is lowered into the corresponding coal seam degree of depth in the open hole well pit shaft, the oil pipe upper end is connected to driving unit on screw pump (8), the high-pressure injection flexible pipe (3) that will be connected to jet nozzle (6) then stretches in the flexible pipe guide pipe (4) by casing head flank mouth, lead under the guiding of the eccentric channel (52) in the footwear (5) in down-hole off-centre, high-pressure injection flexible pipe (3) and jet nozzle (6) are from the vertical duction level.Provide the high-pressure water shot stream energy by high-pressure pump group (1), the water jet energy erosion cutting coal seam that utilizes the forward direction nozzle of jet nozzle (6) to be produced, after jet nozzle (6) enters the coal seam, under back " from tractive force " to nozzle acts on, high-pressure injection flexible pipe (3) enters the coal seam automatically, regulate the linear velocity of hydraulic pressure head roll (2) to adapt to the automatic feed speed of high-pressure injection flexible pipe (3) this moment, open driving unit on screw pump (8) drive screw pump (7) work simultaneously, in time water in the pit shaft and the timely pump drainage of cinder are gone out well head, keep the interior liquid level of pit shaft to be in below the target coal seam all the time, treat creeping into after length reaches design length of horizontal eyelet, slowly reclaim high-pressure injection flexible pipe (3), the hydraulic energy erosion coal seam reaming that utilizes the back to produce to nozzle, have certain diameter thereby form one, and reach the horizontal eyelet of certain drilling depth.
Claims (2)
1. the device of a down-hole radial bore pump drainage coal bed gas, comprise: high-pressure pump group (1), hydraulic-driven cylinder (2), high-pressure injection flexible pipe (3), flexible pipe guide pipe (4), down-hole off-centre is led footwear (5), jet nozzle (6), screw pump (7), driving unit on screw pump (8), it is characterized in that high-pressure pump group (1) is connected with high-pressure injection flexible pipe (3) by swivel joint, the other end of high-pressure injection flexible pipe (3) is connected to jet nozzle (6), high-pressure injection flexible pipe (3) is wrapped on the hydraulic-driven cylinder (2), screw pump (7) is connected on down-hole off-centre and leads footwear (5) bottom, down-hole off-centre is led footwear (5) upper end and is connected with oil pipe, oil pipe upper end connecting screw rod pump drive (8), down-hole off-centre is led footwear (5) upper end and also is connected with flexible pipe guide pipe (4) simultaneously.
2. device as claimed in claim 1 is characterized in that, down-hole off-centre is led footwear (5) two passages is provided, and one is main channel (51), and another is eccentric channel (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100379724A CN102135011A (en) | 2011-02-15 | 2011-02-15 | Device for pumping coal bed gas through underground radial drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100379724A CN102135011A (en) | 2011-02-15 | 2011-02-15 | Device for pumping coal bed gas through underground radial drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102135011A true CN102135011A (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100379724A Pending CN102135011A (en) | 2011-02-15 | 2011-02-15 | Device for pumping coal bed gas through underground radial drilling |
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| CN (1) | CN102135011A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392680A (en) * | 2011-12-02 | 2012-03-28 | 辽宁工程技术大学 | Hole-bottom straight knife slitting device |
| CN108625780A (en) * | 2017-03-23 | 2018-10-09 | 中石化石油工程技术服务有限公司 | A kind of eccentric location device suitable for radial bore |
| CN116422659A (en) * | 2023-05-11 | 2023-07-14 | 河南理工大学 | A self-propelled cleaning method of high-pressure water jets for underground gas drainage pipes |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429848A (en) * | 2007-11-06 | 2009-05-13 | 中国石油大学(北京) | Method apparatus and for hydraulic jet side drilling radial branching borehole |
| EP2098679A1 (en) * | 2008-03-06 | 2009-09-09 | Rune Freyer | A method and device for making lateral openings out of a wellbore |
| WO2009137923A1 (en) * | 2008-05-13 | 2009-11-19 | Petrojet Canada Inc. | Hydraulic drilling method with penetration control |
| CN101748970A (en) * | 2009-12-15 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | Ultra-short radius radial drilling tool system |
| CN201588542U (en) * | 2009-12-01 | 2010-09-22 | 中国石油集团长城钻探工程有限公司 | Self-advancing high-pressure jet head for horizontal drilling |
| CN201635657U (en) * | 2010-04-16 | 2010-11-17 | 张建华 | Downhole drilling tool for intelligent downhole multi-branch horizontal drilling completion system |
| CN201851011U (en) * | 2010-06-11 | 2011-06-01 | 上海宏睿油气田径向井技术服务有限公司 | Device for mining coal bed gas by drilling well in zero radius and in radial direction |
-
2011
- 2011-02-15 CN CN2011100379724A patent/CN102135011A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429848A (en) * | 2007-11-06 | 2009-05-13 | 中国石油大学(北京) | Method apparatus and for hydraulic jet side drilling radial branching borehole |
| EP2098679A1 (en) * | 2008-03-06 | 2009-09-09 | Rune Freyer | A method and device for making lateral openings out of a wellbore |
| WO2009137923A1 (en) * | 2008-05-13 | 2009-11-19 | Petrojet Canada Inc. | Hydraulic drilling method with penetration control |
| CN201588542U (en) * | 2009-12-01 | 2010-09-22 | 中国石油集团长城钻探工程有限公司 | Self-advancing high-pressure jet head for horizontal drilling |
| CN101748970A (en) * | 2009-12-15 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | Ultra-short radius radial drilling tool system |
| CN201635657U (en) * | 2010-04-16 | 2010-11-17 | 张建华 | Downhole drilling tool for intelligent downhole multi-branch horizontal drilling completion system |
| CN201851011U (en) * | 2010-06-11 | 2011-06-01 | 上海宏睿油气田径向井技术服务有限公司 | Device for mining coal bed gas by drilling well in zero radius and in radial direction |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392680A (en) * | 2011-12-02 | 2012-03-28 | 辽宁工程技术大学 | Hole-bottom straight knife slitting device |
| CN102392680B (en) * | 2011-12-02 | 2013-08-07 | 辽宁工程技术大学 | Hole-bottom straight knife slitting device |
| CN108625780A (en) * | 2017-03-23 | 2018-10-09 | 中石化石油工程技术服务有限公司 | A kind of eccentric location device suitable for radial bore |
| CN108625780B (en) * | 2017-03-23 | 2024-02-23 | 中石化石油工程技术服务有限公司 | An eccentric positioning device suitable for radial drilling |
| CN116422659A (en) * | 2023-05-11 | 2023-07-14 | 河南理工大学 | A self-propelled cleaning method of high-pressure water jets for underground gas drainage pipes |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 201206, Shanghai, Pudong New Area, No. 1000 Golden Road, 19 Building, 4 floor, East Applicant after: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. Address before: 201201 Pudong New Area East Road, No. 6111, Shanghai Applicant before: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110727 |