CN201851011U - Device for mining coal bed gas by drilling well in zero radius and in radial direction - Google Patents
Device for mining coal bed gas by drilling well in zero radius and in radial direction Download PDFInfo
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- CN201851011U CN201851011U CN2010202240365U CN201020224036U CN201851011U CN 201851011 U CN201851011 U CN 201851011U CN 2010202240365 U CN2010202240365 U CN 2010202240365U CN 201020224036 U CN201020224036 U CN 201020224036U CN 201851011 U CN201851011 U CN 201851011U
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Abstract
The utility model relates to a device for mining coal bed gas by drilling a well in zero radius and in radial direction. The device mainly comprises a fluid reservoir 1, a filter 2, a high-pressure pump set 3, a hydraulic-driving roller 4, a high-pressure spraying hose 5, a hose guide tube 6, an underground eccentric guide shoe 7, a jet nozzle 8, a screw pump 9 and a screw pump driving device 10, and is characterized in that the upper end of the underground eccentric guide shoe is connected with an oil tube so as to discharge coal cinders and construction liquid generated by underground jet cutting and water in a coal bed out of the mouth of the well in time in the jetting process; the lower part of the hose guide tube is connected with the underground eccentric guide shoe through threads; the high-pressure spraying hose and the jet nozzle enter the hose guide tube from the flank mouth of a casing head so as to enter an eccentric channel of the underground eccentric guide shoe; and the eccentric channel in the underground eccentric guide shoe enables the high-pressure spraying hose to be horizontal from being vertical. The device meets the requirement of simultaneous construction of the underground radial and horizontal well drilling technology and the technology of discharging the underground residual coal cinders and the construction liquid and the water contained in the coal bed in the jetting process.
Description
Technical field: the utility model relates to a kind of high-pressure water jet radial direction well device that is used to improve the coal bed gas recovery ratio.
Background technology: no-radius radial direction well technology is to grow up on the basis of conventional levels well.The no-radius radial direction well is meant the diameter of radius of curvature less than downhole tool, can finish in 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 horizontal drilling 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 radial level 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 problems to be solved in the utility model provides a kind of device of no-radius radial direction well exploiting coal bed methane.
The purpose of the present utility model is the needs according to pre-extraction coal bed gas before the down-hole coal excavation, take out in the lane at the down-hole height and to form one group of radial horizontal drilling in the coal seam section by peupendicular hole, thereby effectively reduce the pressure of coal bed gas hole, the mediation seepage channel, increase permeability, by in the coal seam, boring slotted hole, can increase the contact area of coal bed gas simultaneously, improve the yield of coal bed gas.
In order to address the above problem, the utility model provides a kind of device of no-radius radial direction well exploiting coal bed methane, mainly leads footwear, jet nozzle, screw pump and driving unit on screw pump by fluid reservoir, strainer, high-pressure pump group, hydraulic-driven cylinder, high-pressure injection flexible pipe, flexible pipe guide pipe, down-hole off-centre and forms.Fluid reservoir, strainer and high-pressure pump group directly are serially connected, high-voltage tube by the band chicksan between hydraulic-driven cylinder and the high-pressure pump group is connected, the high-pressure injection flexible pipe is wrapped on the hydraulic-driven cylinder, can realize the automatic feed of high-pressure injection flexible pipe in course of injection by the linear velocity of control hydraulic-driven cylinder, 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 the footwear upper end and is connected with oil pipe, oil pipe upper end connecting screw rod pump drive, while flexible pipe guide pipe bottom is led footwear by screw thread with down-hole off-centre and is connected, the high-pressure injection flexible pipe that is connected with jet nozzle enters the flexible pipe guide pipe by casing head flank mouth, lead in the eccentric channel of footwear thereby enter down-hole off-centre, 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.Provide power source by the high-pressure pump group, the high-pressure injection flexible pipe is as carrier, utilize high pressure water jet, high-pressure water jet erosion coal bed drilling by jet nozzle formation, jet nozzle under the tractive force effect, can realize the automatic feed of high-pressure injection flexible pipe, thereby in the coal seam, spray one of formation and have certain diameter, and reach the horizontal eyelet of certain-length, realize improving the purpose of coal-bed gas exploitation rate, utilize the pump drainage function of screw pump simultaneously, the cinder that can in time jet cutting in down-hole be produced, construction liquid and the moisture pump drainage in coal seam go out well head, keep that liquid level is in below the target coal seam all the time in the pit shaft, to reduce in the pit shaft head of liquid to the influence of coal bed texture.
Improvement of the present utility model is: by the characteristic in conjunction with China's gassy seam, solved the difficult problem that the contained water conservancy project skill in residual cinder, construction liquid and coal seam is constructed simultaneously under the pump-drainage well in down-hole radial horizontal drilling technology and the course of injection.
Description of drawings:
Fig. 1 is a radial direction well system architecture schematic diagram of the present utility model;
Wherein 1 is fluid reservoir, and 2 is strainer, and 3 is the high-pressure pump group, and 4 is the hydraulic-driven cylinder, and 5 for the high-pressure injection flexible pipe, and 6 is the flexible pipe guide pipe, and 7 lead footwear for down-hole off-centre, and 8 is jet nozzle, and 9 is screw pump, and 10 is driving unit on screw pump;
Fig. 2 leads footwear for the down-hole off-centre of Fig. 1;
Fig. 3 is that the A-A of Fig. 2 is to sectional drawing.
The specific embodiment: the concrete structure of describing the device of a kind of no-radius radial direction well exploiting coal bed methane that the utility model proposes below in conjunction with accompanying drawing in detail.The utility model comprises that fluid reservoir 1, strainer 2, high-pressure pump group 3, hydraulic-driven cylinder 4, high-pressure injection flexible pipe 5, flexible pipe guide pipe 6, down-hole off-centre leads footwear 7, jet nozzle 8, screw pump 9, driving unit on screw pump 10.Fluid reservoir 1, strainer 2 directly is serially connected with high-pressure pump group 3, high-voltage tube by the band chicksan between hydraulic-driven cylinder 4 and the high-pressure pump group 3 is connected, high-pressure injection flexible pipe 5 is wrapped on the hydraulic-driven cylinder 4, linear velocity by control hydraulic-driven cylinder 4 realizes the automatic feed of high-pressure injection flexible pipe 5 in course of injection, screw pump 9 is connected on down-hole off-centre and leads footwear 7 bottoms, down-hole off-centre is led footwear 7 upper ends and is connected with oil pipe, oil pipe upper end connecting screw rod pump drive 10, while flexible pipe guide pipe 6 bottoms are led footwear 7 by screw thread and down-hole off-centre and are connected, and 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.
The down-hole off-centre that the bottom is connected to screw pump 9 by oil pipe is led footwear 7 and is lowered into the corresponding coal seam degree of depth in the pit shaft, the oil pipe upper end is connected to driving unit on screw pump 10, the high-pressure injection flexible pipe 5 that will be connected to jet nozzle 8 then stretches in the flexible pipe guide pipe 6 by casing head flank mouth, lead in down-hole off-centre under the eccentric channel guiding of footwear 7, high-pressure injection flexible pipe 5 and jet nozzle 8 are from the vertical duction level.Provide high-pressure water jet by high-pressure pump group 3, the high-pressure water jet erosion cutting coal seam that utilizes jet nozzle to produce, jet nozzle under the tractive force effect, high-pressure injection flexible pipe 5 enters the coal seam automatically, regulate the linear velocity of hydraulic pressure head roll 4 to adapt to high-pressure injection flexible pipe 5 automatic feed speed this moment, have certain diameter thereby form one, and reach the horizontal eyelet of certain drilling depth in target coal seam.By increasing the contact area of hole and coal seam reservoirs effectively, to increase the pressure release area of coal seam reservoirs, enlarge the desorb scope of coal bed gas, improve the coal bed gas recovery ratio.Open the work of driving unit on screw pump 10 drive screw pumps 9 simultaneously, water in the pit shaft and the timely pump drainage of cinder are gone out well head, keep that liquid level is in below the target coal seam all the time in the pit shaft, to reduce in the pit shaft liquid column hydrostatic pressure the influence of coal bed gas desorb.
Claims (1)
1. the device of a no-radius radial direction well exploiting coal bed methane, mainly comprise: fluid reservoir (1), strainer (2), high-pressure pump group (3), hydraulic-driven cylinder (4), high-pressure injection flexible pipe (5), flexible pipe guide pipe (6), down-hole off-centre is led footwear (7), jet nozzle (8), screw pump (9), driving unit on screw pump (10), it is characterized in that fluid reservoir (1), strainer (2) directly is serially connected with high-pressure pump group (3), high-voltage tube by the band chicksan between hydraulic-driven cylinder (4) and the high-pressure pump group (3) is connected, high-pressure injection flexible pipe (5) is wrapped on the hydraulic-driven cylinder (4), high-pressure injection flexible pipe (5) other end is connected to jet nozzle (8), screw pump (9) is connected on down-hole off-centre and leads footwear (7) bottom, down-hole off-centre is led footwear (7) upper end and is connected with oil pipe, oil pipe upper end connecting screw rod pump drive (10), while flexible pipe guide pipe (6) bottom is led footwear (7) by screw thread and down-hole off-centre and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202240365U CN201851011U (en) | 2010-06-11 | 2010-06-11 | Device for mining coal bed gas by drilling well in zero radius and in radial direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202240365U CN201851011U (en) | 2010-06-11 | 2010-06-11 | Device for mining coal bed gas by drilling well in zero radius and in radial direction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851011U true CN201851011U (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202240365U Expired - Fee Related CN201851011U (en) | 2010-06-11 | 2010-06-11 | Device for mining coal bed gas by drilling well in zero radius and in radial direction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851011U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135011A (en) * | 2011-02-15 | 2011-07-27 | 上海宏睿油气田径向井技术服务有限公司 | Device for pumping coal bed gas through underground radial drilling |
| CN102230359A (en) * | 2011-07-01 | 2011-11-02 | 河南省瓦斯治理研究院有限公司 | Horizontal zero-radius high-pressure hydraulic drilling method |
| CN112780208A (en) * | 2021-01-06 | 2021-05-11 | 中国矿业大学 | Gas extraction drilling fault-breaking deformation area repairing system and repairing method |
-
2010
- 2010-06-11 CN CN2010202240365U patent/CN201851011U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135011A (en) * | 2011-02-15 | 2011-07-27 | 上海宏睿油气田径向井技术服务有限公司 | Device for pumping coal bed gas through underground radial drilling |
| CN102230359A (en) * | 2011-07-01 | 2011-11-02 | 河南省瓦斯治理研究院有限公司 | Horizontal zero-radius high-pressure hydraulic drilling method |
| CN112780208A (en) * | 2021-01-06 | 2021-05-11 | 中国矿业大学 | Gas extraction drilling fault-breaking deformation area repairing system and repairing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Wu Gang Document name: Notification to Make Rectification |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 201206, Shanghai, Pudong New Area, No. 1000 Golden Road, 19 Building, 4 floor, East Patentee after: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. Address before: 201201 Pudong New Area East Road, No. 6111, Shanghai Patentee before: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 201206 Shanghai Pudong New Area City Jinxiang road 225 Lane 11, building 2, room 1932 Patentee after: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. Address before: 201206, Shanghai, Pudong New Area, No. 1000 Golden Road, 19 Building, 4 floor, East Patentee before: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Witsun Jetdrill Enhancement Services Co., Ltd. Document name: Notification to Pay the Fees |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20180611 |