CN208619154U - A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging - Google Patents
A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging Download PDFInfo
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- CN208619154U CN208619154U CN201821120500.9U CN201821120500U CN208619154U CN 208619154 U CN208619154 U CN 208619154U CN 201821120500 U CN201821120500 U CN 201821120500U CN 208619154 U CN208619154 U CN 208619154U
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- Prior art keywords
- liquid injection
- swelling
- swelling bag
- positive
- press seal
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Abstract
The utility model discloses a kind of gas drilling plugging equipments closed based on positive-negative press seal bridging, including drainage tube, swelling bag, deflector apron, high pressure liquid injection system, conveying system；The drainage tube is externally provided with two groups of deflector aprons, and swelling bag is fixed on the inside of deflector apron；The high pressure liquid injection system includes topping-up pump, liquid injection pipe, unidirectional explosive valve, and liquid injection pipe one end is located in swelling bag, and the other end is connected with topping-up pump；Conveying system includes pressure fan, conveyer, conveying pipeline, and conveying pipeline one end is across swelling bag and port is positioned at two swelling bags, and the other end is connect with conveyer, pressure fan.The utility model can be blocked by injecting expanding liquid into two swelling bags at sealing section both ends, form confined space, then fine particulate material is injected into confined space using conveying system, and fine particle is pressed into coalmass crevasse by pressure fan and gas drainage negative pressure, crack is further blocked, mash gas pumping drilling sealing quality is effectively improved.
Description
Technical field
The utility model relates to coal bed gas extraction drilling and sealing fields, in particular to a kind of to be based on positive-negative press seal bridging
The gas drilling plugging equipment of conjunction.
Background technique
China coal seam generally has gas bearing capacity height, to the spy that gas adsorption is high, gas pressure is low, gas permeability of coal seam is low
Sign, this has resulted in the problem of coal mine gas administers difficult and coal bed gas extraction low efficiency.Coal bed gas extraction process
In, the influence for the problems such as suffering from mash gas pumping drilling difficulty sealing of hole, easy collapse hole and easy plug-hole is serious to restrict single hole extraction efficiency
With the gas drainage rate of full mine.Most mine gas extraction amount is not up to standard at present in China, in addition to coal bed gas extraction method choice
Improper outer, it is also a major reason that mash gas pumping drilling sealing of hole effect, which can not meet engine request, therefore sealing of hole effect is coal
The key of layer gas drainage.Drilling and sealing engineering has the disadvantage that this coal bed gas extraction sealing quality is difficult to meet at present
Borehole sealing examination requirements, extraction negative pressure is relatively low, gas density is less than normal etc..The hole sealing technology currently used both at home and abroad is mainly organic
Tool formula sealing of hole, macromolecule polymeric material sealing of hole, inolrganic chemicals sealing of hole etc., but existing method for sealing be confined to how
" stifled " drilling, and it is not directed to how to block and handle cracks in coal seam and gas leakage channel, and these cracks in coal seam and gas
Leakage path can develop extension with the influence that the extraction of gas and working face mining induced stress disturb, so as to cause the extraction later period watt
This potential is released, and causes coal body to deform, be displaced and pressure release, and air is easy to pass through this under the action of negative pressure of suction
Some holes, crack enter in extraction borehole, so as to cause the decline of gas drainage under suction concentration, shorten the extraction period of gas drilling.Cause
This, gas extraction concentration low the problems such as poor for sealing quality in current coal bed gas extraction, develops a kind of reliable, efficiently
Mash gas pumping drilling plugging equipment and method for sealing be very there is an urgent need to, this will effectively improve mash gas pumping drilling sealing of hole
Effective seeervice cycle of quality and guarantee drilling improves gas pumping effect.
Utility model content
The purpose of the utility model is to overcome the deficiencies of existing mash gas pumping drilling plugging equipment and method for sealing, provide
A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging, realizes effective closure to mash gas pumping drilling, to have
Effect ensures the mash gas pumping drilling seeervice cycle, improves drilling gas extraction efficiency.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging, the equipment are included drainage tube, swelling bag, led
To baffle, high pressure liquid injection system, conveying system；The drainage tube is externally provided with two groups of deflector aprons, and swelling bag is fixed on guiding gear
On the inside of plate；The high pressure liquid injection system includes topping-up pump, liquid injection pipe, unidirectional explosive valve, liquid injection pipe one end be located in swelling bag and
End point is equipped with unidirectional explosive valve, and the other end is connected with topping-up pump；Conveying system includes pressure fan, conveyer, conveying pipeline, conveying
Pipe one end is across swelling bag and port is positioned at two swelling bags, and the other end is connect with conveyer, pressure fan.
The drainage tube is equipped with two groups of annular shape deflector aprons in mash gas pumping drilling sealing section, and drainage tube is from deflector apron
Center passes through；Every group of deflector apron is made of the circular PVC hardboard that two spacing are 2m, the distance between two groups of deflector aprons
For 8m.
Sealing is fixed with swelling bag, one of swelling bag respectively in groove between two groups of deflector aprons, two baffle
Inside mash gas pumping drilling away from aperture 10m at, another swelling bag is located at mash gas pumping drilling orifice；The swelling bag
For hollow cystic body, material is soft rubber.
Implementation of port, liquid injection hole, material transport hole are respectively equipped on the deflector apron, wherein implementation of port, liquid injection hole and swelling bag
Inside communicates, and material transport hole passes through the swelling bag at mash gas pumping drilling orifice.
The liquid injection hole that described liquid injection pipe one end passes through on deflector apron enters in swelling bag, and the other end is connect with topping-up pump,
And unidirectional explosive valve is equipped at one end port in swelling bag, the burst pressure of unidirectional explosive valve is 0.5MPa.
The conveying pipeline is passed through from material transport hole, and one end puts in the confined space among two swelling bags, the other end and conveying
Machine, pressure fan connection, and confined space one end is put in equipped with multiple sieve pores.
The topping-up pump is equipped with liquid filling pressure table, and air gauge is housed on the pressure fan.
The utility model has the beneficial effects that
1, the utility model by into two swelling bags infuse Ma Lisan A, B liquid, make swelling bag occur at double expand after with brill
Hole wall is in close contact, and forms the preliminary quick blocking to mash gas pumping drilling, reduces drilling gas leakage；
2, the utility model during gas drainage by fine particle be pressed into two swelling bags between confined space, to because
Gas drainage is further blocked with crack in drilling surrounding medium caused by disturbance is adopted, and holding with gas drainage negative pressure
Continuous effect, fine particle gradually penetrate into the fracture network of coal body deep, realize the efficient closure to mash gas pumping drilling, effectively reduce
It leaks out, guarantees extracting result.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the gas drilling plugging equipment that the utility model is closed based on positive-negative press seal bridging；
Fig. 2 is the A-A sectional view of Fig. 1；
In figure: 1-mash gas pumping drilling；2-drainage tubes；3-deflector aprons；4-swelling bags；5-liquid injection pipes；6-is mono-
To explosive valve；7-topping-up pumps；8-conveying pipelines；9-conveyers；10-pressure fans；11-liquid filling pressure tables；12-air gauges；
13-fine particles；14-fracture networks；15-implementation of port；16-liquid injection holes；17-material transport holes.
Specific embodiment
With reference to the accompanying drawing, specific implementation of the patent mode is further described.
As shown in Fig. 1~2, a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging, which includes extraction
Pipe 2, swelling bag 4, deflector apron 3, high pressure liquid injection system, conveying system；The drainage tube is externally provided with two groups of deflector aprons 3, swollen
Swollen capsule 4 is fixed on 3 inside of deflector apron；The high pressure liquid injection system includes topping-up pump 7, liquid injection pipe 5, unidirectional explosive valve 6, fluid injection
5 one end of pipe is located in swelling bag 4 and end point is equipped with unidirectional explosive valve 6, and the other end is connected with topping-up pump 7；Conveying system includes
Pressure fan 10, conveyer 9, conveying pipeline 8,8 one end of conveying pipeline is across swelling bag 4 and port is positioned at two swelling bags, the other end
It is connect by conduit with conveyer 8, pressure fan 10.
The drainage tube 2 is equipped with two groups of annular shape deflector aprons 3 in mash gas pumping drilling sealing section, and drainage tube 2 is from guiding
3 center of baffle passes through；Every group of deflector apron 3 is made of the circular PVC hardboard that two spacing are 2m, two groups of deflector aprons 3 it
Between distance be 8m；Sealing is fixed with swelling bag 4 respectively in groove between described two groups of deflector aprons, 3 liang of baffles, wherein one
A swelling bag 4 is located inside mash gas pumping drilling at away from aperture 10m, another swelling bag 4 is located at mash gas pumping drilling orifice；
The swelling bag 4 is hollow cystic body, and material is soft rubber；Implementation of port 15, liquid injection hole are respectively equipped on the deflector apron 3
16, material transport hole 17 wherein communicate inside implementation of port 15, liquid injection hole 16 and swelling bag, and material transport hole 17 passes through mash gas pumping drilling hole
Swelling bag at mouthful；Described 5 one end of liquid injection pipe passes through the liquid injection hole 16 on deflector apron and enters in swelling bag 4, the other end and note
Liquid pump 7 connects, and unidirectional explosive valve 6 is equipped at one end port in swelling bag 4, and the burst pressure of unidirectional explosive valve 6 is
0.5MPa；The conveying pipeline 8 is passed through from material transport hole 17, and one end puts in the confined space among two swelling bag 4, and the other end passes through
Conduit is connect with conveyer 9, pressure fan 10, and puts in confined space one end equipped with multiple sieve pores；The topping-up pump 7 is equipped with note
Hydraulic coupling table 11, to control liquid filling pressure；On the pressure fan 10 be equipped with air gauge 12, to control to two swelling bags 4 it
Between confined space conveying pressure and into 1 surrounding medium fracture network 14 of mash gas pumping drilling be pressed into fine particle 13 pressure
Power.
Based on the drilling and sealing method for gas that positive-negative press seal bridging is closed, above-mentioned watt closed based on positive-negative press seal bridging is utilized
This drilling and sealing equipment, includes the following steps:
A, it is drilled with mash gas pumping drilling: being drilled with certain depth in coal seam according to the mash gas pumping drilling arrangement parameter of setting
Drilling, and the slack coal in drilling is cleaned out；
B, it is laid with plugging equipment: suitable horse being injected into two swelling bags by the filling liquid hole being located on deflector apron first
Then beautiful scattered A liquid connects drainage tube 2, liquid injection pipe 5, conveying pipeline 8, and by drainage tube 2 and mash gas pumping drilling plugging equipment one
End push-in drilling depths, is located at a swelling bag 4 at 1 aperture of mash gas pumping drilling, another is located at away from aperture 10m；
C, sealing of hole: 5 one end of liquid injection pipe is connect with topping-up pump 7, and Ma Lisan B is injected into two swelling bags 4 by topping-up pump 7
Liquid adjusts 11 pressure of liquid filling pressure table, the unidirectional explosion when 7 liquid filling pressure of topping-up pump reaches 0.5MPa, in swelling bag 4
Valve 6 ruptures, and Ma Lisan B liquid is sufficiently mixed under the explosion power of unidirectional explosive valve 6 with the Ma Lisan A liquid in swelling bag 4, Ma Li
Dissipate A, B liquid mixing be sufficiently mixed after rapidly occur expand at double, mash gas pumping drilling is blocked, and two swelling bags 4 it
Between form the confined space of a 8m, complete preliminary closure to mash gas pumping drilling 1；
Coalmass crevasse blocks: with coal seam digging and gas drainage release, mash gas pumping drilling 1 gradually deforms, week
The intracorporal crack propagation development of coal, perforation are enclosed, leakage path is formed, needs the fracture network 14 to 1 periphery of mash gas pumping drilling at this time
It is blocked.When being blocked to fracture network 14, conveying pipeline 8 is connected with conveyer 9 and pressure fan 10 first, passes through pressure fan
10 are blown into the fine particle 13 in conveyer 9 confined space between two swelling bags 4, wherein the particle size range of fine particle 13
For by nanoscale to grade；10 pressure of pressure fan is adjusted, makes 12 pressure registration 0.8MPa of air gauge, passes through pressure fan 10
By fine particle 13 be pressed into sealing section borehole circumference coal body crack group 14 in, further to sealing section coalmass crevasse net 14 into
Row blocks；And with the continuous action of gas drainage negative pressure, fine particle 13 gradually penetrates into coal body deep fracture network 14, real
It now to the efficient closure of mash gas pumping drilling, effectively reduces and leaks out, extend the extraction time.
The above is only the preferred embodiment of the utility model only, is not limitation with the utility model, all at this
Made any modifications, equivalent replacements, and improvements within the spirit and principle of utility model, such as change swelling bag shape and material,
Change liquid filling pressure and conveying pressure etc., should be included within the scope of protection of this utility model.
Claims (8)
1. it is a kind of based on positive-negative press seal bridging close gas drilling plugging equipment, it is characterised in that: including drainage tube, swelling bag,
Deflector apron, high pressure liquid injection system, conveying system；The drainage tube is externally provided with two groups of deflector aprons, and swelling bag is fixed on guiding
On the inside of baffle；The high pressure liquid injection system includes topping-up pump, liquid injection pipe, unidirectional explosive valve, and liquid injection pipe one end is located in swelling bag
And end point is equipped with unidirectional explosive valve, the other end is connected with topping-up pump；Conveying system includes pressure fan, conveyer, conveying pipeline, defeated
Expects pipe one end is across swelling bag and port is positioned at two swelling bags, and the other end is connect with conveyer, pressure fan.
2. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 1, feature are existed
Two groups of annular shape deflector aprons are equipped in mash gas pumping drilling sealing section in: the drainage tube, and drainage tube is from deflector apron center
It passes through；Every group of deflector apron is made of the circular PVC hardboard that two spacing are 2m, and the distance between two groups of deflector aprons are
8m。
3. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 2, feature are existed
In: sealing is fixed with swelling bag respectively in the groove between two groups of deflector aprons, two baffle, and one of swelling bag is located at
Inside mash gas pumping drilling away from aperture 10m at, another swelling bag is located at mash gas pumping drilling orifice.
4. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 3, feature are existed
In: the swelling bag is hollow cystic body, and material is soft rubber.
5. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 1, feature are existed
In: implementation of port, liquid injection hole, material transport hole are respectively equipped on the deflector apron, wherein implementation of port, liquid injection hole and phase inside swelling bag
Logical, material transport hole passes through the swelling bag at mash gas pumping drilling orifice.
6. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 1, feature are existed
In: described liquid injection pipe one end passes through the liquid injection hole on deflector apron and enters in swelling bag, and the other end is connect with topping-up pump, and swollen
Unidirectional explosive valve is equipped at swollen intracapsular one end port, the burst pressure of unidirectional explosive valve is 0.5MPa.
7. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 1, feature are existed
In: the conveying pipeline is passed through from material transport hole, and one end puts in the confined space among two swelling bags, the other end and conveyer, pressure
Blower connection, and confined space one end is put in equipped with multiple sieve pores.
8. a kind of gas drilling plugging equipment closed based on positive-negative press seal bridging according to claim 1, feature are existed
In: the topping-up pump is equipped with liquid filling pressure table, and air gauge is housed on the pressure fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821120500.9U CN208619154U (en) | 2018-07-13 | 2018-07-13 | A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821120500.9U CN208619154U (en) | 2018-07-13 | 2018-07-13 | A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208619154U true CN208619154U (en) | 2019-03-19 |
Family
ID=65705712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821120500.9U Expired - Fee Related CN208619154U (en) | 2018-07-13 | 2018-07-13 | A kind of gas drilling plugging equipment closed based on positive-negative press seal bridging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208619154U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757011A (en) * | 2018-07-13 | 2018-11-06 | 中国矿业大学(北京) | A kind of gas drilling plugging equipment and method based on the conjunction of positive-negative press seal bridging |
| CN110529173A (en) * | 2019-08-26 | 2019-12-03 | 河南工程学院 | A kind of straight plug integration gas drainage device and pumping method |
| CN114607312A (en) * | 2022-03-11 | 2022-06-10 | 中国矿业大学 | Device and method for real-time multiple hole sealing |
-
2018
- 2018-07-13 CN CN201821120500.9U patent/CN208619154U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757011A (en) * | 2018-07-13 | 2018-11-06 | 中国矿业大学(北京) | A kind of gas drilling plugging equipment and method based on the conjunction of positive-negative press seal bridging |
| CN110529173A (en) * | 2019-08-26 | 2019-12-03 | 河南工程学院 | A kind of straight plug integration gas drainage device and pumping method |
| CN114607312A (en) * | 2022-03-11 | 2022-06-10 | 中国矿业大学 | Device and method for real-time multiple hole sealing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190319 Termination date: 20190713 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |