CN109958402A - A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling - Google Patents
A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling Download PDFInfo
- Publication number
- CN109958402A CN109958402A CN201910342825.4A CN201910342825A CN109958402A CN 109958402 A CN109958402 A CN 109958402A CN 201910342825 A CN201910342825 A CN 201910342825A CN 109958402 A CN109958402 A CN 109958402A
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- CN
- China
- Prior art keywords
- gas
- pressure
- air bag
- automatic control
- mash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 52
- 238000005086 pumping Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 165
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000002184 metal Substances 0.000 claims abstract description 49
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 18
- 238000001465 metallisation Methods 0.000 claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 2
- 238000009434 installation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011499 joint compound Substances 0.000 description 3
- 239000002674 ointment Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The present invention relates to a kind of pressure-sustaining gas of mash gas pumping drilling to block support device and implementation method, and device mainly includes elevated pressure nitrogen gas source, elevated pressure nitrogen gas source valve, connecting tube, the metal tube of the integrated gas switch automatic control device based on pressure gauge registration, external metallization annulus, interior metal annulus, air bag, gas drainage pipe and gas drainage pipe switch etc..The interior metal annulus is codetermined by mash gas pumping drilling diameter and gas drainage pipe outside diameter, the external metallization annulus by mash gas pumping drilling diameter and gas drainage pipe outside diameter in addition to being determined, it is also contemplated that the metal pipe outside diameter of the integrated gas switch automatic control device based on pressure gauge registration.The nitrogen pressure being passed through in the air bag is determined by the coal seam stress of primary rock along coal bed drilling.Gas automatic control switch on the metal tube can make the gas pressure in air bag maintain a constant state, persistently blocked and supported to along coal bed gas extraction drilling.
Description
Technical field
This patent applies to the closure of coal mine gas extraction drill hole, proposes a kind of pressure-sustaining gas envelope of mash gas pumping drilling
Stifled support device and implementation method.
Technical background
Extraction along coal-bed gas is the most important component part of gas drainage technical field, the stabilization of mash gas pumping drilling
Property directly affects the extracting result of mash gas pumping drilling.As increasingly exhaustion, the China's coal-mine of domestic superficial part coal resources are opened
Gradually increasing for depth is adopted, and being continuously increased along with coal mining depth, gas face most serious at many mining areas
Problem.Want to achieve the purpose that efficiently use gas, the practical gas drainage results of gas are the key factors for determining its success or failure, and are bored
The practical plugging effect in hole is the extracting result for directly determining coal-bed gas again.Therefore, the blocking technology of coal-bed gas is studied
And it develops related device equipment and is just particularly important.Currently, the common borehole sealing material of China's coal-mine mainly has cement bonded sand
Sealing material such as slurry, yellow mud, polyurethane and ointment material etc. continue sealing material.The materials such as cement mortar, yellow mud
Although expecting there is from a wealth of sources, lower-price characteristic, it is long that there are setting times after cement mortar and yellow mud progress sealing of hole
The problems such as delaying the duration, occurring crack after a sealing of hole mostly and influence extracting result.Although the polyurethane sealing of hole sealing of hole time is short,
Polyurethane material cannot effectively support hole wall.Ointment material blocks for other materials, can keep around drilling
Pressure stabilizing state, but ointment material transport it is more difficult and need it is special be filled with equipment, lead to higher cost.
Patent content
For current mash gas pumping drilling plugging effect poor, plugging material cannot effectively support hole wall, block it is at high cost etc.
Problem, this patent propose that a kind of pressure-sustaining gas of mash gas pumping drilling blocks support device and implementation method, and this patent utilizes use
In displacement free gas high pressure nitrogen as plugging material, utilize pressure gauge setting value to automatically control connection high-pressure air source and envelope
Gas shutoff capsule switch, achievees the purpose that constant pressure blocks and mash gas pumping drilling is supported to reach stability and high efficiency mash gas extraction.
In order to achieve the purpose that block mash gas pumping drilling simultaneously and borehole wall be supported to prevent and treat collapse hole, this patent is used
Technical solution are as follows:
A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling, including based on pressure gauge registration
Gas switch automatic control device, switch ends connection is elevated pressure nitrogen gas source and for blocking mash gas pumping drilling and propping up respectively
Support hole wall air bag, the balloon ends sheet metal being connected on gas drainage pipe prevent air bag by gas drainage pipe and watt
Along mash gas pumping drilling axial direction prolonged expansion after the constraint of this extraction borehole hole wall.
The gas switch automatic control device based on pressure gauge registration controls resistance, pressure using pressure representative number
Number is indicated according to the presetting tolerance zone of the stress of primary rock in coal seam, pressure gauge pressure registration is more than that the setting range upper limit is then controlled
Gas source switch processed is closed, and stops being filled with nitrogen into the air bag of support hole wall from elevated pressure nitrogen gas source；Corresponding pressure gauge pressure shows
Number then controls gas source switch opening lower than setting range lower limit, starts to be filled with nitrogen into air bag from elevated pressure nitrogen gas source.
The sheet metal being connected on gas drainage pipe is metal ring, and drilling, superficial part annulus connection one is integrated to be based on
The metal tube of the gas switch automatic control device of pressure gauge registration is integrated with the gas switch based on pressure gauge registration and controls automatically
The metal tube both ends of device processed are separately connected air bag and elevated pressure nitrogen gas source valve.The metal ring internal-and external diameter is bored by gas drainage
Bore dia and gas drainage pipe outside diameter determine, it should be noted that annulus outer diameter should be slightly less than mash gas pumping drilling diameter and facilitate and will contain
There is the gas drainage pipe of metal ring to fit into mash gas pumping drilling.The outer all material of the intracapsular nitrogen of degasification after gas drainage
It is recyclable, and secondary use without processing the devices such as metal ring again.
A kind of pressure-sustaining gas of mash gas pumping drilling blocks support device and implementation method, and function is real according to the following steps
It is existing:
1. after measuring mash gas pumping drilling diameter, according to selected gas drainage pipe outside diameter, required metal ring is processed,
And it is connected in gas drainage pipe outer wall according to corresponding position；
2. being connected to superficial part metal for the metal tube of the gas switch automatic control device based on pressure gauge registration is integrated with
The setting position of annulus；
3. air bag is connected between two metal rings, and airbag deployment is tiled to gas drainage pipe outer wall；
4. the gas drainage pipe that will be assembled is installed into mash gas pumping drilling；
5. elevated pressure nitrogen gas source is connected to the metal tube for being integrated with the gas switch automatic control device based on pressure gauge registration
It is placed on the interface at tunnel end；
6. opening elevated pressure nitrogen gas source valve, it is inflated to setting value to air bag, elevated pressure nitrogen gas source valve is in normally open, main
High pressure nitrogen is controlled by the gas switch control device based on pressure gauge registration to be filled with.
Compared with prior art, the features of the present invention and beneficial effect are:
1) the present invention is based on plastic zone environment around mash gas pumping drilling, and effective support can be played to mash gas pumping drilling
Effect restores gas draining borehole ambient stress state, blocks crack；
2) present invention is filled with air bag with high pressure nitrogen, the common material of displacement free gas when high pressure nitrogen is gas drainage
Material, no longer needs to purchase new equipment new material, easy to use and cost is relatively low；
3) this patent can keep the automatic voltage regulation state of air bag, and after will not reaching certain phase because of gas drainage, gas is taken out
The drilling envelope of sealing of hole caused by borehole edge stress reduces surrounding crack increases, and causes gas drainage efficiency and gas drainage quality
The problems such as reduction；
4) this patent only need to close high pressure nitrogen source switch, nitrogen in air bag is released after gas drainage,
It extracts gas drainage pipe out, facilitates recycling, and equipment can be recycled completely, required cost is only the nitrogen cost in air bag.
Detailed description of the invention
A kind of pressure-sustaining gas of mash gas pumping drilling of Fig. 1 blocks support device and implementation method schematic diagram；
Fig. 2 bladder support device and metal ring schematic diagram
Fig. 3 external metallization annulus schematic diagram
Fig. 4 bladder support coal wall blocks drilling schematic diagram
Wherein: 1: elevated pressure nitrogen gas source；2: elevated pressure nitrogen gas source valve；3: being integrated with the gas switch based on pressure gauge registration certainly
The metal tube of dynamic control device；4: external metallization annulus；5: air bag；6: coal seam；7: interior metal annulus；8: gas drainage pipe valve
Door；9: gas drainage pipe；10: mash gas pumping drilling；11: connecting tube
Specific embodiment
With reference to the accompanying drawing, specific implementation of the patent mode is further illustrated.
A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling, including air bag 5, air bag is connected with
The metal tube 3 of the integrated gas switch automatic control device based on pressure gauge registration, this is integrated with the gas based on pressure gauge registration
The metal tube of body switch automatic control device is connected on external metallization annulus 4, by being integrated with based on pressure gauge registration for connection
Gas switch automatic control device metal tube 3 external metallization annulus 4 and interior metal annulus 7 be connected to gas pumping
The corresponding position for adopting pipe 9, the mash gas pumping drilling 9 air bag 5 being laid between external metallization annulus 4 and interior metal annulus 7
Outer wall on.The mash gas pumping drilling 9 for having installed all components additional is installed into and uses connecting tube along in coal bed gas extraction drilling 10
11, connect the valve switch 2 of elevated pressure nitrogen gas source 1 and the metal of the integrated gas switch automatic control device based on pressure gauge registration
Pipe 3.
Elevated pressure nitrogen gas source valve 2 is opened, high pressure nitrogen is passed through into air bag 5, in the air bag shown to pressure representative digital display
After pressure reaches presetting maximum pressure value, it is integrated with the metal of the gas switch automatic control device based on pressure gauge registration
Switch on pipe is automatically closed, and the nitrogen in elevated pressure nitrogen gas source 1 is prevented to continue to be filled in air bag 5.Show to pressure representative digital display
After nitrogen pressure is lower than presetting minimum pressure values in air bag, it is integrated with the gas switch based on pressure gauge registration and automatically controls
Switch on the metal tube of device automatically opens, and continues to be filled with nitrogen, keeps the gas pressure in air bag in a certain range,
Reach pressure constant state.
A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling, to drill along coal bed gas extraction
It is illustrated for depth 120m, mash gas pumping drilling diameter 120mm, steps are as follows:
A) mash gas pumping drilling diameter is 120mm, and selecting outer diameter is the gas drainage pipe of 90mm, then metal ring outer diameter can
It is set to 118mm.Internal diameter can be set to 91mm, process two annulus according to being sized；
B) external annulus is opened into the circular hole of a diameter 11mm as shown in figure 3, the gas based on pressure gauge registration will be integrated with
The metal tube 3 that body switch automatic control device outer diameter is 10mm is connected in the round hole, and two metal rings are connected to watt
On this drainage tube, as shown in Figure 2；
C) 5 interface of air bag is connected to the metal tube for being integrated with the gas switch automatic control device based on pressure gauge registration
On interior side interface, and airbag deployment is tiled to gas drainage pipe outer wall；
D) the gas drainage pipe that will be assembled, is installed into mash gas pumping drilling, then by elevated pressure nitrogen gas source sum aggregate at having
Side interface connects outside the metal tube of gas switch automatic control device based on pressure gauge registration, opens elevated pressure nitrogen gas source valve,
High pressure nitrogen is filled with into air bag；
E) after stable gas pressure in air bag, it is integrated with the metal of the gas switch automatic control device based on pressure gauge registration
Automatic control switch on pipe is closed, and stopping is passed through nitrogen, and air bag is made to be maintained at a pressure constant state；
F) by underground gas extraction piping connection to gas drainage pipe, gas drainage pipe is opened, starts mash gas extraction.With
The extension of gas drainage time, mash gas pumping drilling edge stress reduce, the pressure in air bag will also decrease, and reach presetting
After lower limit value, the automatic control switch being integrated on the metal tube of the gas switch automatic control device based on pressure gauge registration is beaten
It opens, nitrogen is passed through into air bag, remain valid and support mash gas pumping drilling, to keep good borehole sealing effect；
G) after the completion of gas drainage, elevated pressure nitrogen gas source valve is closed, closed gas extraction borehole valve removes underground watt
Lower connector is unloaded in the connection of this extraction pipeline and gas drainage pipe, releases the nitrogen in air bag, and gas drainage pipe is taken out from gas
It is taken out in borehole.Because same mine gas extraction bore diameter is almost the same, therefore can be directly effective by the gas drainage unloaded
In next mash gas pumping drilling, the gas drainage work along coal-bed gas drilling is carried out.
Claims (5)
1. a kind of pressure-sustaining gas of mash gas pumping drilling blocks support device and implementation method, including elevated pressure nitrogen gas source, elevated pressure nitrogen
Gas source valve, connecting tube, the metal tube that is integrated with the gas switch automatic control device based on pressure gauge registration, special processing
Inside and outside metal ring, air bag will be integrated with metal tube, the metal of the gas switch automatic control device based on pressure gauge registration
Annulus and air bag installation after gas drainage tube etc., it is characterised in that: after air bag is full of, can be restored according to coal seam stress of primary rock value
Borehole sealing section periphery stress of coal seams, automatic control switch can control nitrogen pressure in air bag to maintain a constant pressure always
State.
2. a kind of pressure-sustaining gas of the mash gas pumping drilling required according to right 1 blocks support device and implementation method, feature
Be: metal ring is codetermined according to the gas drainage pipe outside diameter along coal bed gas extraction bore diameter and selection, outer diameter
Mash gas pumping drilling diameter should be slightly less than, internal diameter should be slightly bigger than gas drainage pipe outside diameter, which can also be effective
Constraint air bag being radially expanded after inflation.
3. a kind of pressure-sustaining gas of the mash gas pumping drilling required according to right 1 blocks support device and implementation method, feature
It is: opens elevated pressure nitrogen gas source valve, is filled into air bag such as nitrogen, and elevated pressure nitrogen gas source valve is in normally opened in use
State controls being filled with for nitrogen by the gas switch automatic control device based on pressure gauge registration.
4. a kind of pressure-sustaining gas of the mash gas pumping drilling required according to right 1 blocks support device and implementation method, feature
Be: external metallization annulus top aperture connects the metal tube of the gas switch automatic control device based on pressure representative number, and
Control device should be located at tunnel side when assembling, and inside and outside metal ring is connected in gas drainage pipe outer wall according to drilling depth.
5. a kind of pressure-sustaining gas of mash gas pumping drilling blocks support device and implementation method, it is characterised in that according to the following steps
It carries out:
1) it beats and drills along coal bed gas extraction, determine mash gas pumping drilling diameter and calculate coal seam stress of primary rock value；
2) according to along coal bed gas extraction bore diameter and gas drainage pipe outside diameter, processing metal ring, and according to being integrated with base
Special processing is carried out in the external portion's metal ring of the metal pipe outside diameter of the gas switch automatic control device of pressure gauge registration；
3) metal ring is connected to the appropriate location of gas drainage pipe outer wall, the gas based on pressure gauge registration will be integrated with and opened
The metal tube for closing automatic control device is connected to external annulus；
4) air bag is laid in gas drainage pipe outer wall, be integrated with according to the stress of primary rock value in coal seam is presetting based on pressure representative
The upper and lower limit of several gas switch automatic control devices；
5) the gas drainage pipe assembled is installed into mash gas pumping drilling, with connecting tube, connection is integrated with based on pressure gauge
The metal tube external interface and elevated pressure nitrogen gas source valve of the gas switch automatic control device of registration connect gas drainage pipe and well
Lower methane gas extraction pipeline；
6) elevated pressure nitrogen gas source valve is opened, nitrogen is passed through to air bag, after nitrogen pressure stably reaches pre-set value in air bag, beats
Gas drainage tube valve is opened, starts extraction along the gas in coal bed gas extraction drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910342825.4A CN109958402A (en) | 2019-04-25 | 2019-04-25 | A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910342825.4A CN109958402A (en) | 2019-04-25 | 2019-04-25 | A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling |
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| Publication Number | Publication Date |
|---|---|
| CN109958402A true CN109958402A (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910342825.4A Pending CN109958402A (en) | 2019-04-25 | 2019-04-25 | A kind of the pressure-sustaining gas closure support device and implementation method of mash gas pumping drilling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946389A (en) * | 2020-08-03 | 2020-11-17 | 河南工程学院 | Coal mine mining area gas extraction device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU79931U1 (en) * | 2008-07-21 | 2009-01-20 | Алексей Михайлович Ермолаев | DEVICE FOR SEALING DESTINATION WELLS |
| CN103115843A (en) * | 2012-12-26 | 2013-05-22 | 中国人民解放军63653部队 | In situ measurement method for rock mass gas permeability |
| CN203335015U (en) * | 2013-05-30 | 2013-12-11 | 彭广岗 | Gas drainage coal seam water injection air-bag type hole sealing device |
| CN107605484A (en) * | 2017-08-28 | 2018-01-19 | 中国矿业大学 | A kind of liquid nitrogen freezing formula coal uncovering method |
| WO2018145391A1 (en) * | 2017-02-13 | 2018-08-16 | 中国矿业大学 | Dynamic water replenishing hole sealing method by means of high water-absorbent resin |
-
2019
- 2019-04-25 CN CN201910342825.4A patent/CN109958402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU79931U1 (en) * | 2008-07-21 | 2009-01-20 | Алексей Михайлович Ермолаев | DEVICE FOR SEALING DESTINATION WELLS |
| CN103115843A (en) * | 2012-12-26 | 2013-05-22 | 中国人民解放军63653部队 | In situ measurement method for rock mass gas permeability |
| CN203335015U (en) * | 2013-05-30 | 2013-12-11 | 彭广岗 | Gas drainage coal seam water injection air-bag type hole sealing device |
| WO2018145391A1 (en) * | 2017-02-13 | 2018-08-16 | 中国矿业大学 | Dynamic water replenishing hole sealing method by means of high water-absorbent resin |
| CN107605484A (en) * | 2017-08-28 | 2018-01-19 | 中国矿业大学 | A kind of liquid nitrogen freezing formula coal uncovering method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946389A (en) * | 2020-08-03 | 2020-11-17 | 河南工程学院 | Coal mine mining area gas extraction device and method |
| CN111946389B (en) * | 2020-08-03 | 2022-03-25 | 河南工程学院 | Coal mine mining area gas extraction device and method |
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Application publication date: 20190702 |
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