CN208252103U - A kind of coal gas layer development device - Google Patents
A kind of coal gas layer development device Download PDFInfo
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- CN208252103U CN208252103U CN201820296280.9U CN201820296280U CN208252103U CN 208252103 U CN208252103 U CN 208252103U CN 201820296280 U CN201820296280 U CN 201820296280U CN 208252103 U CN208252103 U CN 208252103U
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Abstract
The utility model discloses a kind of coal gas layer development devices, including gas pressurized pipe, water-supply-pipe, liquid nitrogen delivery pipe, first vent plug, second vent plug, first air bag, second air bag, electric heating piece, liquid nitrogen feedway, water supply device, silk plug, gas supply device, controller, run through gas pressurized pipe in first vent plug, water-supply-pipe and liquid nitrogen delivery pipe, second vent plug is arranged on gas pressurized pipe and water-supply-pipe, first air bag and the second air bag are successively set on gas pressurized pipe, electric heating piece is respectively provided with inside first vent plug and the second vent plug, the liquid nitrogen outlet of liquid nitrogen delivery pipe one end is between the first vent plug and the second vent plug, the other end of liquid nitrogen delivery pipe is connected with liquid nitrogen feedway, gas pressurized pipe is connected with gas supply device.The exploitation of coal gas layer is carried out using the utility model, it is high-efficient, at low cost and more environmentally-friendly.
Description
Technical field
The utility model belongs to Coal-seam Gas Recovery Technologies field, and in particular to a kind of coal gas layer development device.
Background technique
China's Permeability Coefficent in Coal Seam is generally lower, in coal gas layer development process, in order to improve production capacity, can generally use
Artificial well stimulation improves reservoir properties, expands the contact area of reservoir and hypertonic channel.In the prior art, coal gas layer is developed most
Common well stimulation is hydraulic fracturing.
But hydraulic fracturing keeps the effect of entire hole section cracking bad, meanwhile, hydraulic fracturing can cause underground to a certain degree
Water pollution has suppressed high pressure for formation breakdown, thus fracturing fluid can polluted underground water body.
Therefore, it is necessary to design a kind of coal gas layer development device of environment-friendly high-efficiency.
Summary of the invention
The purpose of this utility model is to provide a kind of coal gas layer development device, the utility model is able to achieve coal gas layer environmental protection
The purpose of Efficient Development.
To achieve the above object, the utility model provides the following technical solutions:
A kind of coal gas layer development device, including gas pressurized pipe, water-supply-pipe, liquid nitrogen delivery pipe, the first vent plug, the second gas
Plug, the first air bag, the second air bag, electric heating piece, liquid nitrogen feedway, water supply device, silk plug, gas supply device, controller, institute
Gas pressurized pipe, water-supply-pipe and liquid nitrogen delivery pipe is stated to be arranged parallel, in first vent plug through gas pressurized pipe, water-supply-pipe and
Liquid nitrogen delivery pipe, second vent plug are arranged on gas pressurized pipe and water-supply-pipe, first air bag and the second air bag according to
It is secondary to be arranged on gas pressurized pipe, electric heating piece, the liquid nitrogen delivery pipe one are respectively provided with inside first vent plug and the second vent plug
Between the first vent plug and the second vent plug, the other end of liquid nitrogen delivery pipe is connected the liquid nitrogen outlet at end with liquid nitrogen feedway
It is logical, it is located on the water-supply-pipe inside the first vent plug and the second vent plug and is provided with water outlet, be located at the first air bag and the
It is provided with gas outlet on the gas pressurized pipe of two inside air bags, on the gas pressurized pipe between the first air bag and the second air bag
It is provided with gas outlet, silk plug, the gas pressurized pipe other side is arranged in the end of the gas pressurized pipe on the outside of the second air bag
End be connected with gas supply device, the distance between the first vent plug and the second vent plug be less than or equal to the first air bag and second
The distance between air bag, the electric heating piece inside first vent plug and the second vent plug are electrically connected with the controller.
Preferably, first vent plug and the second vent plug are made of water-absorbent material.
Preferably, the water-absorbent material is velveteen.
Preferably, first air bag and the second air bag are that acrylic rubber is made.
Preferably, first air bag and the second air bag are that hydrogenated nitrile-butadiene rubber is made.
Preferably, the gas that the gas supply device provides is nitrogen.
Preferably, the gas that the gas supply device provides is carbon dioxide.
The beneficial effects of the utility model are: the exploitation of coal gas layer is carried out using the utility model, and it is high-efficient, it is at low cost, and
It is more environmentally-friendly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1- gas pressurized pipe；2- water-supply-pipe；3- liquid nitrogen delivery pipe；The first vent plug of 4-；The second vent plug of 5-；6- first
Air bag；The second air bag of 7-；8- electric heating piece；9- liquid nitrogen outlet；10- liquid nitrogen feedway；11- water outlet；12- water supply device；
13- silk plug；14- gas supply device；The gas outlet 15-；16- controller；The coal seam the 17- borehole wall.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of coal gas layer development device, including gas pressurized pipe 1, water-supply-pipe 2, liquid nitrogen delivery pipe 3, first
Vent plug 4, the second vent plug 5, the first air bag 6, the second air bag 7, electric heating piece 8, liquid nitrogen feedway 10, water supply device 12, silk plug 13,
Gas supply device 14, controller 16, the gas pressurized pipe 1, water-supply-pipe 2 and liquid nitrogen delivery pipe 3 are arranged parallel, and described first
Run through gas pressurized pipe 1, water-supply-pipe 2 and liquid nitrogen delivery pipe 3 in vent plug 4, second vent plug 5 is arranged in 1 He of gas pressurized pipe
On water-supply-pipe 2, first air bag 6 and the second air bag 7 are successively set on gas pressurized pipe 1, first vent plug 4 and
Electric heating piece 8 is respectively provided with inside two vent plugs 5, the liquid nitrogen outlet 9 of described 3 one end of liquid nitrogen delivery pipe is located at the first vent plug 4 and second
Between vent plug 5, the other end of liquid nitrogen delivery pipe 3 is connected with liquid nitrogen feedway 10, is located at the first vent plug 4 and the second gas
It is provided with water outlet 11 on water-supply-pipe 2 inside plug 5, the gas pressurized pipe being located inside the first air bag 6 and the second air bag 7
It is provided with gas outlet 15 on 1, is provided with gas outlet 15 on the gas pressurized pipe 1 between the first air bag 6 and the second air bag 7,
Positioned at the end of the gas pressurized pipe 1 in the outside of the second air bag 7, silk plug 13 is set, the end of 1 other side of gas pressurized pipe with
Gas supply device 14 is connected, and the distance between the first vent plug 4 and the second vent plug 5 are less than or equal to the first air bag 6 and the second gas
Electric heating piece 8 inside the distance between capsule 7, first vent plug 4 and the second vent plug 5 is electrically connected with controller 16.
Preferably, first vent plug 4 and the second vent plug 5 are made of water-absorbent material.
Preferably, the water-absorbent material is velveteen.
Preferably, first air bag 6 and the second air bag 7 are that acrylic rubber is made.
Preferably, first air bag 6 and the second air bag 7 are that hydrogenated nitrile-butadiene rubber is made.
Preferably, the gas that the gas supply device 14 provides is nitrogen.
Preferably, the gas that the gas supply device 14 provides is carbon dioxide.
The use operating method of the utility model:
The utility model is protruded into gas well containing the section of the first vent plug 4, the second vent plug 5, the first air bag 6 and the second air bag 7
In scheduled position, starting water supply device 12 so that water supply device 12 is supplied water into water-supply-pipe 2.
Into the water in water-supply-pipe 2 respectively from the water outlet 11 on the water-supply-pipe 2 inside the first vent plug 4 and the second vent plug 5
Outflow.
Because the water-absorbent material of the first vent plug 4 of production and the second vent plug 5 can absorb water, and the good water holding of energy, water-absorbent material can
To use velveteen, soft, good water absorption, retentiveness is strong.Velveteen is relatively soft, can the smooth movement in gas well.
The water that the water-absorbent material of first vent plug 4 and the second vent plug 5 respectively flows out water outlet 11 absorbs, 4 He of the first vent plug
After water-absorbent material water suction in second vent plug 5 is sufficient, stop water supply device 12 for water running.
Start liquid nitrogen feedway 10, the liquid nitrogen stored in liquid nitrogen feedway 10 is transported to by liquid nitrogen delivery pipe 1
In gas well between first vent plug 4 and the second vent plug 5.
Because the water-absorbent material in the first vent plug 4 and the second vent plug 5 absorbs many water, under the action of liquid nitrogen, first
Vent plug 4 and the expansion of 5 flash freeze of the second vent plug, so that the first vent plug 4 and the second vent plug 5 are close with the coal seam borehole wall 17 of gas well
Contact, gas well section between the first vent plug 4 and the second vent plug 5 form a closed space, and liquid nitrogen is in the first vent plug 4 and the
Gas well section storage between two vent plugs 5, liquid nitrogen will carry out the gas well section range between the first vent plug 4 and the second vent plug 5
Frac treatment.
In fracturing process, using the ultralow temperature characteristics of liquid nitrogen, liquid nitrogen can generate apparent cold shock effect to coal seam, because
Coal seam thermal coefficient is small and characteristic of expanding with heat and contract with cold is sensitive, and when contacting in the short time of coal seam with a large amount of liquid nitrogen, local temperature can be big
Amplitude rapid decrease, so that coal seam matrix is acutely shunk, coal petrography porosity, permeability increase, and the shrinkage stress of generation is more than coal
When the tensile strength of rock, many microcracks can be formed inside coal seam, coal petrography is even fragmented into nuts, the slack coal of partial exfoliation
Filling can play the role of proppant, prevent crack closure to crack.The strengths in tension and compression in coal seam and rupture after cold shock
Pressure can all decrease, and be conducive to fracturing fracture and extend to deeper layer.The low temperature environment that liquid nitrogen is formed can make coal seam fracture
In water flooding freezing and expansion, generate additional stress on the wall surface of crack, cause the extruding of coal petrography to destroy, generate more fine fisssures
Seam.
After the completion of one underground section fracturing operation, liquid nitrogen feedway 10 is shut down, operates controller 16, starts the first gas
Electric heating piece 8 inside plug 4 and the second vent plug 5, electric heating piece 8 heat up, i.e. removable, behaviour after the first vent plug 4 and the defrosting of the second vent plug 5
Make controller 16 and shuts down electric heating piece 8.
When section of the mobile the utility model containing the first vent plug 4, the second vent plug 5, the first air bag 6 and the second air bag 7, because of the
The distance between one vent plug 4 and the second vent plug 5 are less than or equal to the distance between the first air bag 6 and the second air bag 7, as long as making first
Section between air bag 6 and the second air bag 7 is covered on the last time by the gas well section position of frac treatment.
Next, the first vent plug 4 and the second vent plug 5 can continue frac treatment repeated as above.On the other hand, Ke Yiqi
It takes offence body feeding 14, gas supply device 14 is made to supply the gas of high temperature and pressure, gas pressurized pipe into gas pressurized pipe 1
Gas in 1 by respectively from inside the first air bag 6 and the second air bag 7 gas outlet 15 and the first air bag 6 and the second air bag 7
Between gas outlet 15 be discharged, because the end of gas pressurized pipe 1 is provided with silk plug 13, gas cannot be discharged from end.
Rubber material expands after first air bag 6 and the second air bag 7 enter high temperature and high pressure gas, the first air bag 6 and the
The outer wall and the coal seam borehole wall 17 of two air bags 7 are in close contact.Coal gas layer well section between first air bag 6 and the second air bag 7 becomes close
Seal space.Meanwhile it being maintained centainly into the high temperature and high pressure gas of the coal gas layer well section between the first air bag 6 and the second air bag 7
Pressure, and gas heats the coal gas layer of last first vent plug 4 and 5 pressure break of the second vent plug in a high voltage state, thaws
The crack of pressure break, and the pre-heat treatment is carried out to coal gas layer, so that the coal bed gas of coal gas layer absorption is easier to parse, be conducive to
High-efficiency mining exploitation.When the first air bag 6 and the second air bag 7 need mobile, stop the gas supply of gas supply device 14 and pressure release, the
One air bag 6 and 7 internal gas of the second air bag are drawn off, volume-diminished, and the first air bag 6 and the second air bag 7 can be in gas wells smoothly
It is mobile.
Development process such as above-mentioned application method are repeated in progress.
The supply of gas supply device 14 is high temperature and pressure nitrogen or high temperature and pressure carbon dioxide gas, is applied in production
It is very safe, and gas source is easy to produce to obtain, lower production costs.
Acrylic rubber and hydrogenated nitrile-butadiene rubber have many advantages, such as high-intensitive, wear-resisting, heat-resisting, ageing-resistant, oil resistant etc., power
Better performances are learned, can apply to various high temperature, in resistance to oil environment, using effect is more preferable.
The exploitation of coal gas layer is carried out using the utility model, the borehole wall 17 fracturing effect in coal seam is obvious, efficiency is higher and cost compared with
It is low.Meanwhile because liquid nitrogen will not pollute underground water, pressure operation process is very environmentally friendly.High temperature and high pressure gas is cooperated to thaw
Coal gas layer crack, promotes parsing coal bed gas, and coal gas layer is developed more efficient.
Claims (7)
1. a kind of coal gas layer development device, which is characterized in that including gas pressurized pipe, water-supply-pipe, liquid nitrogen delivery pipe, the first gas
Plug, the second vent plug, the first air bag, the second air bag, electric heating piece, liquid nitrogen feedway, water supply device, silk plug, gas supply device,
Controller, the gas pressurized pipe, water-supply-pipe and liquid nitrogen delivery pipe are arranged parallel, and gas pressurized is run through in first vent plug
Pipe, water-supply-pipe and liquid nitrogen delivery pipe, second vent plug are arranged on gas pressurized pipe and water-supply-pipe, first air bag and the
Two air bags are successively set on gas pressurized pipe, and electric heating piece, the liquid are respectively provided with inside first vent plug and the second vent plug
Between the first vent plug and the second vent plug, the other end and liquid nitrogen of liquid nitrogen delivery pipe supply the liquid nitrogen outlet of nitrogen delivery pipe one end
It is connected to device, is located on the water-supply-pipe inside the first vent plug and the second vent plug and is provided with water outlet, is located at
It is provided with gas outlet on the gas pressurized pipe of one air bag and the second inside air bag, the gas between the first air bag and the second air bag
It is provided with gas outlet on body forcing pipe, silk plug is arranged in the end of the gas pressurized pipe on the outside of the second air bag, and the gas adds
The end of the pressure pipe other side is connected with gas supply device, and the distance between the first vent plug and the second vent plug are less than or equal to first
The distance between air bag and the second air bag, the electric heating piece inside first vent plug and the second vent plug are electrically connected with the controller.
2. a kind of coal gas layer development device according to claim 1, which is characterized in that first vent plug and the second vent plug
It is made of water-absorbent material.
3. a kind of coal gas layer development device according to claim 2, which is characterized in that the water-absorbent material is velveteen.
4. a kind of coal gas layer development device according to claim 1, which is characterized in that first air bag and the second air bag
It is that acrylic rubber is made.
5. a kind of coal gas layer development device according to claim 1, which is characterized in that first air bag and the second air bag
It is that hydrogenated nitrile-butadiene rubber is made.
6. a kind of coal gas layer development device according to claim 1, which is characterized in that the gas supply device provided
Gas is nitrogen.
7. a kind of coal gas layer development device according to claim 1, which is characterized in that the gas supply device provided
Gas is carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820296280.9U CN208252103U (en) | 2018-03-05 | 2018-03-05 | A kind of coal gas layer development device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820296280.9U CN208252103U (en) | 2018-03-05 | 2018-03-05 | A kind of coal gas layer development device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208252103U true CN208252103U (en) | 2018-12-18 |
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ID=64607571
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820296280.9U Expired - Fee Related CN208252103U (en) | 2018-03-05 | 2018-03-05 | A kind of coal gas layer development device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208252103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411920A (en) * | 2020-03-30 | 2020-07-14 | 陇东学院 | Coal gas layer development device |
-
2018
- 2018-03-05 CN CN201820296280.9U patent/CN208252103U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411920A (en) * | 2020-03-30 | 2020-07-14 | 陇东学院 | Coal gas layer development device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20181218 Termination date: 20210305 |