CN109798096A - Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling - Google Patents
Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling Download PDFInfo
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- CN109798096A CN109798096A CN201910038576.XA CN201910038576A CN109798096A CN 109798096 A CN109798096 A CN 109798096A CN 201910038576 A CN201910038576 A CN 201910038576A CN 109798096 A CN109798096 A CN 109798096A
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Abstract
The present invention relates to gas drainage technical fields, and it discloses pressure on a kind of half-edge coal seam layer-through drilling and lets out pumping method, include the following steps: step 1: arrangement scene, a. multiple high pressure water injection pressure breaks hole is uniformly opened up side by side in the top that the high-dipping being produced is intended to antireflective heading, fixation is communicated with water filling rubber tube in each high pressure water injection pressure break hole, multiple water filling rubber tubes are made to be fixedly connected with the same multi-pass pipe, and it is fixedly connected with multi-pass pipe with external fracturing pump far from one end of water filling rubber tube, high pressure water injection valve is equipped on the tube wall of multi-pass pipe.Pumping method is let out in pressure on the half-edge coal seam layer-through drilling, and it is anti-reflection to can be realized top pressure break, lower part pressure release draining, convenient for the quick progress of drainage works.
Description
Technical field
The present invention relates to gas drainage technical field, extraction side is let out in pressure on specially a kind of half-edge coal seam layer-through drilling
Method.
Background technique
China majority mining area has entered deep mining, and the crustal stress of deep fractures increases, the gas permeability in coal seam is lower, gas
The difficulty of extraction is bigger.Downhole hydraulic fracturing technique is big with pressure break range, relief range is big, antireflective effect clear advantage,
Become that deep lower permeability seam is anti-reflection, a kind of effective technical way of region release.
Currently used downhole hydraulic fracturing technique is arranged by the way of directional hole pressure break, in the mistake drained
Only need drainage holes that water is discharged in journey, this mode is only applicable to the lesser inclined seam of tilt angle, for inclination angle
Spend big coal seam since its tilt angle is big, be perfused high pressure water in it can due to itself gravity along coal seam inclined direction
It flows downward, therefore, it is difficult to be effectively discharged by conventional drainage holes, if will timely cannot be located in coal seam
High pressure water discharge, not only results in and encounters a large amount of water flow in subsequent horizontal direction recovery process, influence production efficiency, and
It will increase the gas pressure in coal seam, be easy to cause the risk of Gas Outburst, safety is lower, and the exploitation for being not easy to coal seam makes
With.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides pressures on a kind of half-edge coal seam layer-through drilling to let out extraction side
Method has anti-reflection, the lower part pressure release draining that can be realized top pressure break, convenient for drainage works quick progress the advantages that, solve
If cannot will timely be located at the high pressure water in coal seam to be discharged, not only results in and met in subsequent horizontal direction recovery process
To a large amount of water flow, production efficiency is influenced, and will increase the gas pressure in coal seam, be easy to cause the risk of Gas Outburst,
The problem of safety is lower, is not easy to the exploitation use in coal seam.
(2) technical solution
To realize anti-reflection, the lower part pressure release draining that can be realized top pressure break, convenient for the purpose of drainage works quickly carried out,
The invention provides the following technical scheme: pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling, include the following steps:
Step 1: arrangement scene
A. multiple high pressure water injection pressure breaks are uniformly opened up side by side in the top that the high-dipping being produced is intended to antireflective heading
Hole, fixation is communicated with water filling rubber tube in each high pressure water injection pressure break hole, is fixedly connected with multiple water filling rubber tubes together
One multi-pass pipe, and it is fixedly connected with multi-pass pipe with external fracturing pump far from one end of water filling rubber tube, in the pipe of multi-pass pipe
Wall is equipped with high pressure water injection valve；
B. multiple draining drainage holes are uniformly opened up side by side in the lower section that the high-dipping being produced is intended to antireflective heading,
Fixation is communicated with draining drainage tube in each draining drainage holes, is equipped with switch valve on multiple draining drainage tubes and is arranged inside
There is hydraulic pressure sensor, drain drainage tube by clamping mechanism and be fixedly connected with dredging pipe, and makes dredging pipe far from draining drainage tube
One end be fixedly connected with connecting tube, the left and right ends of the connecting tube are communicated with suction pump and fixation by water pipe fixation respectively
It is communicated with extraction main pipe, and extraction main pipe is fixedly connected with extraction pump far from one end of connecting tube, and connecting tube corresponds to suction pump
Water pumping valve and extraction valve are respectively equipped with the both ends tube wall of extraction pump；
Step 2: high pressure water injection
Water pumping valve and extraction valve and synchronous opening high pressure water injection valve are closed, fracturing pump is started, passes through multi-pass pipe and water filling rubber
Sebific duct injected into high pressure water injection pressure break hole high pressure water to inclined seam carry out fracturing operation, water filling after the completion of close fracturing pump and
High pressure water injection valve stays in high pressure water in coal seam 15~20 days；
Step 3: draining
Water pumping valve and switch valve, the high pressure water that starting suction pump will inject in coal seam are opened on the basis of step 2 is completed
It is discharged outside coal seam by draining drainage holes by draining drainage tube, dredging pipe and connecting tube；
Step 4: mash gas extraction
Water pumping valve and suction pump are closed on the basis of step 3 is completed, open extraction valve and starts extraction pump, utilize pumping
The suction force for adopting pump makes the gas in coal seam by draining drainage tube, dredging pipe, connecting tube and the extraction of extraction main pipe, realizes to coal
The extraction work of the lower part gas of layer, then disconnect and be connected and disconnected from water filling rubber tube and pressure break between extraction main pipe and connecting tube
Connection between pump connect water filling rubber tube with extraction main pipe, in starting extraction pump, realizes the extraction to coal seam top gas
Work.
Preferably, sealing of hole operation is carried out to each high pressure water injection pressure break hole and draining drainage holes.
Preferably, the clamping mechanism includes the positioning ring flat-plate for being fixedly connected on draining extraction pipe outer wall, the dredging pipe
Upper end be symmetrically fixedly connected with multiple locating pieces, the lower end of the positioning ring flat-plate offers locating slot corresponding with locating piece,
The side wall of the locating piece offers cylinder groove, and cylinder groove is interior to be fixedly connected with kelly by thrust spring, the locating slot
Side wall offers card hole corresponding with kelly, slidably connects push rod in the card hole.
Preferably, the filter screen for filtering dirt is fixedly connected in the dredging pipe.
Preferably, the draining drainage holes are obliquely installed, and inclination angle is the elevation angle.
(3) beneficial effect
Compared with prior art, the present invention provides pressures on a kind of half-edge coal seam layer-through drilling to let out pumping method, has
It is standby following the utility model has the advantages that
1, pumping method is let out in pressure on the half-edge coal seam layer-through drilling, by the draining drainage tube being equipped with, in water filling work
Each draining extraction can quickly and effectively be detected according to the hydraulic pressure sensor being equipped in draining drainage tube on the basis of completing
Hydraulic pressure in pipe can carry out drainage works out of which draining drainage tube according to the limited selection of pressure regulation demand, dredging pipe is inserted
Outside the draining drainage tube for needing to drain, locating piece is inserted into locating slot, when kelly is moved at card hole, thrust spring push card
Kelly is released outside cylinder groove and kelly is made to engage the firm company that can be realized between draining drainage tube and dredging pipe with card hole by bar
It connects, the quick positioning of degree of can be realized dredging pipe, opens water pumping valve and switch valve, the high pressure that starting suction pump will inject in coal seam
Water is discharged outside coal seam by draining drainage holes by draining drainage tube, dredging pipe and connecting tube, and is pressed and pushed away after the completion of draining
Kelly is released the relative limit locking that can be released outside card hole to dredging pipe, can be realized to the quick of dredging pipe by bar, push rod
It is located by connecting, convenient for the quick progress of drainage works, can be realized that top pressure break is anti-reflection, and pressure release draining in lower part is easy to use.
2, pumping method is let out in pressure on the half-edge coal seam layer-through drilling, can by the filter screen being equipped in dredging pipe
Avoiding the problem that the dirt in coal seam enters in dredging pipe influences draining extraction.
Detailed description of the invention
Fig. 1 is that pumping method structural schematic diagram is let out in pressure on a kind of half-edge coal seam layer-through drilling proposed by the present invention；
Fig. 2 is the part that the portion A in pumping method Fig. 1 is let out in pressure on a kind of half-edge coal seam layer-through drilling proposed by the present invention
Schematic enlarged-scale view.
In figure: 1 high pressure water injection pressure break hole, 2 water filling rubber tubes, 3 multi-pass pipes, 4 fracturing pumps, 5 high pressure water injection valves, 6 drainings are taken out
Adopt hole, 7 draining drainage tubes, 8 switch valves, 9 hydraulic pressure sensors, 10 dredging pipes, 11 connecting tubes, 12 suction pumps, 13 extraction main pipes, 14
Extraction pump, 15 water pumping valves, 16 extraction valves, 17 positioning ring flat-plates, 18 locating pieces, 19 locating slots, 20 cylinder grooves, 21 thrust springs, 22
Kelly, 23 card holes, 24 push rods, 25 filter screens.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling referring to FIG. 1-2, is included the following steps:
Step 1: arrangement scene
A. multiple high pressure water injection pressure breaks are uniformly opened up side by side in the top that the high-dipping being produced is intended to antireflective heading
Hole 1, it is fixed in each high pressure water injection pressure break hole 1 to be communicated with water filling rubber tube 2, it is fixedly connected with multiple water filling rubber tubes 2
There is the same multi-pass pipe 3, and be fixedly connected with multi-pass pipe 3 with external fracturing pump 4 far from one end of water filling rubber tube 2, more
The tube wall of siphunculus 3 is equipped with high pressure water injection valve 5；
B. multiple draining drainage holes 6 are uniformly opened up side by side in the lower section that the high-dipping being produced is intended to antireflective heading,
It is fixed in each draining drainage holes 6 to be communicated with draining drainage tube 7, be equipped on multiple draining drainage tubes 7 switch valve 8 and its
It is inside provided with hydraulic pressure sensor 9, drainage tube 7 is drained by clamping mechanism and is fixedly connected with dredging pipe 10, and keeps dredging pipe 10 remote
One end from draining drainage tube 7 is fixedly connected with connecting tube 11, and the left and right ends of the connecting tube 11 are fixed by water pipe respectively
It is communicated with suction pump 12 and fixation is communicated with extraction main pipe 13, and extraction main pipe 13 is fixedly connected with far from one end of connecting tube 11
Extraction pump 14, and the corresponding suction pump 12 of connecting tube 11 and the both ends tube wall of extraction pump 14 are respectively equipped with water pumping valve 15 and extraction valve
16；
Step 2: high pressure water injection
Water pumping valve 15 and extraction valve 16 and synchronous opening high pressure water injection valve 5 are closed, starts fracturing pump 4, passes through 3 He of multi-pass pipe
Water filling rubber tube 2 injects high pressure water into high pressure water injection pressure break hole 1 and carries out fracturing operation to inclined seam, closes after the completion of water filling
Fracturing pump 4 and high pressure water injection valve 5 stay in high pressure water in coal seam 15~20 days；
Step 3: draining
Open water pumping valve 15 and switch valve 8 on the basis of step 2 is completed, starting suction pump 12 will inject in coal seam
High pressure water is discharged outside coal seam by draining drainage holes 6 by draining drainage tube 7, dredging pipe 10 and connecting tube 11；
Step 4: mash gas extraction
Water pumping valve 15 and suction pump 12 are closed on the basis of step 3 is completed, and open extraction valve 16 and start extraction pump
14, make the gas in coal seam by draining drainage tube 7, dredging pipe 10, connecting tube 11 and extraction using the suction force of extraction pump 14
Main pipe 12 is extracted out, realizes that the extraction to part gas under coal seam works, then disconnect the company between extraction main pipe 12 and connecting tube 11
The connection between water filling rubber tube 2 and fracturing pump 4 is connect and disconnected, connect water filling rubber tube 2 with extraction main pipe 13, is taken out in starting
Pump 14 is adopted, realizes that the extraction to coal seam top gas works.
Sealing of hole operation is carried out to each high pressure water injection pressure break hole 1 and draining drainage holes 6.
The clamping mechanism includes the positioning ring flat-plate 17 for being fixedly connected on draining 7 outer wall of drainage tube, the dredging pipe 10
Upper end is symmetrically fixedly connected with multiple locating pieces 18, and the lower end of the positioning ring flat-plate 17 offers positioning corresponding with locating piece 18
Slot 19, the side wall of the locating piece 18 offer cylinder groove 20, pass through thrust spring 21 in cylinder groove 20 and be fixedly connected with kelly
22, the side wall of the locating slot 19 offers card hole 23 corresponding with kelly 22, slidably connects push rod 24 in the card hole 23.
The filter screen 25 for filtering dirt is fixedly connected in the dredging pipe 10.
The draining drainage holes 6 are obliquely installed, and inclination angle is the elevation angle.
In conclusion pumping method is let out in pressure on the half-edge coal seam layer-through drilling, in use, being taken out by the draining being equipped with
Pipe 7 is adopted, it can be quickly and effectively according to the hydraulic pressure sensor 9 being equipped in draining drainage tube 7 on the basis of filling the water work and completing
The hydraulic pressure in each draining drainage tube 7 is detected, can be arranged out of which draining drainage tube 7 according to the limited selection of pressure regulation demand
Water conservancy project is made, and dredging pipe 10 is inserted in outside the draining drainage tube 7 for needing to drain, and locating piece 18 is inserted into locating slot 19, and kelly 22 moves
When moving to card hole 23, thrust spring 21 pushes kelly 22, and kelly 22 is released outside cylinder groove 20 and makes kelly 22 and card hole 23
Engaging, which can be realized, drains being bonded between drainage tube 7 and dredging pipe 10, the quick positioning of degree of can be realized dredging pipe 10,
Water pumping valve 15 and switch valve 8 are opened, starting suction pump 12 is by the high pressure water injected in coal seam by draining drainage holes 6 by draining
Drainage tube 7, dredging pipe 10 and connecting tube 11 are discharged outside coal seam, and push rod 24 is pressed after the completion of draining, and push rod 24 is by kelly 22
The relative limit locking that can be released outside card hole 23 to dredging pipe 10 is released, the quick positioning to dredging pipe 10 is can be realized and connects
It connects, convenient for the quick progress of drainage works, can be realized that top pressure break is anti-reflection, and pressure release draining in lower part is easy to use, passes through dredging
The filter screen 25 being equipped in pipe 10 can be avoided the dirt in coal seam and enter in dredging pipe 10 the problem of influencing draining extraction.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling, characterized by the following steps:
Step 1: arrangement scene
A. multiple high pressure water injection pressure breaks hole is uniformly opened up side by side in the top that the high-dipping being produced is intended to antireflective heading,
Fixation is communicated with water filling rubber tube in each high pressure water injection pressure break hole, is fixedly connected with multiple water filling rubber tubes same more
Siphunculus, and it is fixedly connected with multi-pass pipe with external fracturing pump far from one end of water filling rubber tube, it is set on the tube wall of multi-pass pipe
There is high pressure water injection valve；
B. multiple draining drainage holes are uniformly opened up side by side in the lower section that the high-dipping being produced is intended to antireflective heading, each
Fixation is communicated with draining drainage tube in draining drainage holes, is equipped with switch valve on multiple draining drainage tubes and water is arranged inside
Pressure sensor drains drainage tube by clamping mechanism and is fixedly connected with dredging pipe, and makes the one of the separate draining drainage tube of dredging pipe
End is fixedly connected with connecting tube, and the left and right ends of the connecting tube are communicated with suction pump by water pipe fixation respectively and are connected to fixation
There is extraction main pipe, and extraction main pipe is fixedly connected with extraction pump far from one end of connecting tube, and connecting tube corresponds to suction pump and pumping
The both ends tube wall for adopting pump is respectively equipped with water pumping valve and extraction valve；
Step 2: high pressure water injection
Water pumping valve and extraction valve and synchronous opening high pressure water injection valve are closed, fracturing pump is started, passes through multi-pass pipe and water filling rubber tube
High pressure water is injected into high pressure water injection pressure break hole, fracturing operation is carried out to inclined seam, close fracturing pump and high pressure after the completion of water filling
Water injection valve stays in high pressure water in coal seam 15~20 days；
Step 3: draining
Water pumping valve and switch valve are opened on the basis of step 2 is completed, starting suction pump passes through the high pressure water injected in coal seam
Drainage holes are drained to be discharged outside coal seam by draining drainage tube, dredging pipe and connecting tube；
Step 4: mash gas extraction
Water pumping valve and suction pump are closed on the basis of step 3 is completed, open extraction valve and starts extraction pump, utilize extraction pump
Suction force make the gas in coal seam by draining drainage tube, dredging pipe, connecting tube and extraction main pipe extraction, realize under coal seam
The extraction of part gas works, then disconnect between extraction main pipe and connecting tube being connected and disconnected from water filling rubber tube and fracturing pump it
Between connection, make to fill the water rubber tube and connect with extraction main pipe, starting extraction pump, realization is to the extraction work of coal seam top gas
Make.
2. pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling according to claim 1, it is characterised in that: right
Each high pressure water injection pressure break hole and draining drainage holes carry out sealing of hole operation.
3. pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling according to claim 1, it is characterised in that: institute
Stating clamping mechanism includes the positioning ring flat-plate for being fixedly connected on draining extraction pipe outer wall, and the upper end of the dredging pipe is symmetrically fixedly connected
There are multiple locating pieces, the lower end of the positioning ring flat-plate offers locating slot corresponding with locating piece, and the side wall of the locating piece is opened
Equipped with cylinder groove, kelly is fixedly connected with by thrust spring in cylinder groove, the side wall of the locating slot offers and kelly pair
The card hole answered slidably connects push rod in the card hole.
4. pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling according to claim 1, it is characterised in that: institute
State the filter screen being fixedly connected in dredging pipe for filtering dirt.
5. pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling according to claim 1, it is characterised in that: institute
It states draining drainage holes to be obliquely installed, and inclination angle is the elevation angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038576.XA CN109798096A (en) | 2019-01-16 | 2019-01-16 | Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038576.XA CN109798096A (en) | 2019-01-16 | 2019-01-16 | Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling |
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| CN109798096A true CN109798096A (en) | 2019-05-24 |
Family
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| CN201910038576.XA Pending CN109798096A (en) | 2019-01-16 | 2019-01-16 | Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153436A (en) * | 2021-05-18 | 2021-07-23 | 中国矿业大学 | Intelligent water drainage system for coal seam roof |
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| CN113153436A (en) * | 2021-05-18 | 2021-07-23 | 中国矿业大学 | Intelligent water drainage system for coal seam roof |
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Application publication date: 20190524 |