CN110593781A - Coal powder discharging device for coal bed gas exploitation - Google Patents
Coal powder discharging device for coal bed gas exploitation Download PDFInfo
- Publication number
- CN110593781A CN110593781A CN201910923273.6A CN201910923273A CN110593781A CN 110593781 A CN110593781 A CN 110593781A CN 201910923273 A CN201910923273 A CN 201910923273A CN 110593781 A CN110593781 A CN 110593781A
- Authority
- CN
- China
- Prior art keywords
- liquid
- coal
- injection
- settling
- drainage
- 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.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 75
- 239000000843 powder Substances 0.000 title claims abstract description 35
- 238000007599 discharging Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 147
- 238000002347 injection Methods 0.000 claims abstract description 61
- 239000007924 injection Substances 0.000 claims abstract description 61
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 238000005065 mining Methods 0.000 claims abstract description 21
- 230000035485 pulse pressure Effects 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims description 30
- 239000002817 coal dust Substances 0.000 claims description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002002 slurry Substances 0.000 abstract description 3
- 238000009991 scouring Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0078—Nozzles used in boreholes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a coal powder discharging device for coal bed gas mining, which adopts a liquid injection assembly and a liquid discharge assembly to inject anti-settling agent liquid into a well, wherein the anti-settling agent liquid generally adopts agent liquid which is beneficial to dissolving coal powder, the coal powder can be well dissolved and simultaneously can be discharged, the liquid injection assembly injects the anti-settling agent liquid into a coal powder anti-settling device in a pulse pressure mode, the liquid discharge assembly discharges the anti-settling agent liquid discharged by the coal powder anti-settling device, slurry can be discharged from liquid outlet holes on the coal powder anti-settling device, the coal powder is dissolved and washed, meanwhile, because the diameters of each group of liquid outlet holes are different, the liquid flowing out from the liquid outlet holes has different flow rates and different flows, the liquid can flow in the well, and the coal powder discharging is beneficial to realizing; the invention adopts a plurality of injection disks and liquid injection bag bodies, under the pulse pressure, the expansion adjustment can occur, and the liquid flowing out from the liquid outlet holes has different flow rates and different pressure due to deformation, so that the scouring effect of the liquid on the pulverized coal is further realized, and the outward discharging effect is ensured.
Description
Technical Field
The invention belongs to the technical field of similar material tests, and particularly relates to a coal powder discharging device for coal bed methane mining.
Background
In the coal bed gas exploitation process, if the quality of the water discharged from the drainage and exploitation well gradually becomes black, the coal powder is possibly blocked or precipitated, because the flow rate of the water discharged from the oil pipe is lower than the speed of driving the coal powder to be discharged outside, the coal powder is precipitated, under the condition, if the coal powder is precipitated in the pump cylinder, the soft blocking is easy to occur, the liquid discharge is reduced, the unloading phenomenon exists in the downstroke, and the stroke hanger shakes violently; liquid does not flow out after the pump is clamped, the down stroke current is small, the operation is fast, the up stroke current is large, the operation is slow, and the maximum load displayed by an indicator diagram is larger than the normal value in the operation process of the pumping unit; if the pulverized coal is deposited on the valve seat, pump leakage can occur, the output liquid is reduced, the pump efficiency is lowered, the leakage work diagram of the fixed valve shows that the left lower corner and the right lower corner are lost, the unloading of the lower stroke is delayed, and the upper stroke is loaded in advance. Therefore, in the process of mining coal bed gas, coal powder needs to be discharged outwards, and meanwhile the reliability of the coal powder discharge is guaranteed.
Disclosure of Invention
The coal powder outer discharging device for coal bed methane mining is simple in structure, convenient to operate, capable of preventing coal powder from precipitating and capable of improving the drainage effect.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a coal seam gas is opened and is taken out whitewashed outer discharging equipment, prevent sinking ware including the buggy, annotate liquid subassembly and flowing back subassembly, the buggy prevents sinking the ware and is located the pit shaft of coal bed gas extraction well, it is outside on the well that annotate liquid subassembly and flowing back subassembly are located coal bed gas extraction well, the buggy prevents sinking the ware and connects the lower extreme at the extraction pole coaxially, it all is connected with the upper portion of adopting the pole to annotate liquid subassembly and flowing back subassembly, it can prevent sinking agent liquid with pulse pressure's mode and pour into the buggy into to annotate liquid subassembly through adopting the pole and prevent sinking agent liquid that the ware was discharged that sinks through adopting the pole to the flowing back subassembly.
The pulverized coal anti-settling device comprises a plurality of injection disks which are arranged at intervals from top to bottom, each injection disk is of an annular structure, each two adjacent injection disks are connected with one injection bag body, a plurality of liquid outlet holes are uniformly formed in the outer circle surface of each injection disk along the circumferential direction, and the pore sizes of the liquid outlet holes of the plurality of injection disks are different.
The liquid injection bag body is of a cavity structure with large cross sections at the upper end and the lower end and small cross section in the middle, a liquid outlet pipe is arranged at the lowest end of the pulverized coal anti-settling device, and a control valve is arranged on the liquid outlet pipe.
The liquid injection sac body of the pulverized coal anti-settling device is made of corrosion-resistant rubber materials and has certain elasticity so as to realize telescopic adjustment under the pulse pressure of the liquid injection assembly.
The top of the coal dust anti-settling device is connected with the lower end of the extraction rod through a hollow connecting column.
Annotate the liquid subassembly and include the liquid pump, annotate the liquid pipe, annotate the liquid joint and annotate the liquid flowmeter, the liquid pump passes through annotate the liquid pipe and annotate the liquid joint and be connected with the upper portion of adopting the pole, annotate the liquid flowmeter and install on annotating the liquid pipe.
The drainage assembly comprises a drainage pump, a drainage pipe, a drainage connector and a drainage flowmeter, wherein the drainage pump is connected with the upper part of the extraction rod through the drainage pipe and the drainage connector, and the drainage flowmeter is arranged on the drainage pipe.
The liquid pump and the liquid pump are controlled by the controller, the controller controls the liquid pump and the liquid pump to work intermittently, and the work pace of the liquid pump lags behind that of the liquid pump.
The cross sections of the upper end and the lower end of the liquid injection bag body are the same as the outer diameter of the injection disk.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that:
(1) the anti-settling agent liquid is injected into the underground by the liquid injection assembly and the liquid discharge assembly, the anti-settling agent liquid generally adopts the agent liquid which is beneficial to dissolving coal dust, so that the coal dust can be well dissolved and can be discharged, the anti-settling agent liquid is injected into the coal dust anti-settling device downwards by the liquid injection assembly through the extraction rod in a pulse pressure mode, and thus slurry can be discharged from liquid outlet holes in the coal dust anti-settling device to dissolve and wash the coal dust; after the liquid injection pump stops injecting liquid, the liquid discharge pump works, the liquid discharge pump pumps the anti-settling agent liquid for dissolving coal dust upwards out of the coal bed gas extraction well through the coal dust anti-settling device and the extraction rod,
(2) the invention adopts a mode of alternately connecting a plurality of injection disks and the liquid injection bag bodies, so that under pulse pressure, the liquid injection bag can be telescopically adjusted, and the liquid flowing out of the liquid outlet holes is injected outwards at different flow rates and under different pressures due to deformation, thereby further ensuring the scouring effect of the liquid on the pulverized coal and ensuring the outward discharge effect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is an enlarged schematic structural view of the pulverized coal anti-settling device of the present invention.
Detailed Description
As shown in fig. 1 and 2, the coal powder discharge device for coal bed gas mining of the invention comprises a coal powder anti-settling device 3, a liquid injection component and a liquid discharge component, wherein the coal powder anti-settling device 3 is positioned in a shaft of a coal bed gas extraction well 1, the liquid injection component and the liquid discharge component are positioned on the upper part and the outer part of the coal bed gas extraction well 1, the coal powder anti-settling device 3 is coaxially connected to the lower end of an extraction rod 2, the liquid injection component and the liquid discharge component are both connected with the upper part of the extraction rod 2, the liquid injection component can inject anti-settling agent liquid into the coal powder anti-settling device 3 in a pulse pressure mode through the extraction rod 2, and the liquid discharge component can discharge the anti-settling agent liquid discharged by the coal powder anti-settling device 3 through the extraction rod 2.
The coal dust anti-settling device 3 comprises a plurality of injection disks 13 which are arranged at an upper interval and a lower interval, the injection disks 13 are of a circular ring structure, two adjacent injection disks 13 are connected with one injection bag body 12, the outer circle surface of each injection disk 13 is uniformly provided with a plurality of liquid outlet holes 4 along the circumferential direction, and the pore sizes of the liquid outlet holes 4 of the plurality of injection disks 13 are different.
The liquid injection capsule 12 is a cavity structure with large cross sections at the upper end and the lower end and small cross section at the middle, a liquid outlet pipe 15 is arranged at the lowest end of the pulverized coal anti-settling device 3, and a control valve 14 is arranged on the liquid outlet pipe 15.
The liquid injection capsule body 12 of the pulverized coal anti-settling device 3 is made of corrosion-resistant rubber materials and has certain elasticity so as to realize telescopic adjustment under the pulse pressure of the liquid injection assembly.
The top of the coal dust anti-settling device 3 is connected with the lower end of the extraction rod 2 through a hollow connecting column.
The liquid injection assembly comprises a liquid injection pump 7, a liquid injection pipe 16, a liquid injection joint 6 and a liquid injection flowmeter 10, wherein the liquid injection pump 7 is connected with the upper part of the extraction rod 2 through the liquid injection pipe 16 and the liquid injection joint 6, and the liquid injection flowmeter 10 is installed on the liquid injection pipe 16.
The drainage assembly comprises a drainage pump 8, a drainage pipe 17, a drainage connector 5 and a drainage flowmeter 9, wherein the drainage pump 8 is connected with the upper part of the extraction rod 2 through the drainage pipe 17 and the drainage connector 5, and the drainage flowmeter 9 is installed on the drainage pipe 17.
The liquid pump 7 and the liquid pump are controlled by a controller, the controller controls the liquid pump and the liquid pump 7 to work intermittently, and the working pace of the liquid pump lags behind that of the liquid pump 7.
According to the coal dust extraction well, the anti-settling agent liquid is injected into the well by the liquid injection assembly and the liquid discharge assembly, the anti-settling agent liquid generally adopts the agent liquid which is beneficial to dissolving coal dust, so that the coal dust can be well dissolved and can be discharged, the anti-settling agent liquid is injected into the coal dust anti-settling device 3 downwards by the liquid injection assembly through the extraction rod 2 in a pulse pressure mode, and thus slurry can be discharged from the liquid outlet holes 4 in the coal dust anti-settling device 3 to dissolve and wash the coal dust; after the liquid injection pump 7 stops injecting liquid, the liquid discharge pump 8 works, the liquid discharge pump 8 pumps the anti-settling agent liquid dissolving coal powder upwards out of the coal bed gas extraction well 1 through the coal powder anti-settling device 3 and the extraction rod 2.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a coal seam gas is opened coal and is whitewashed device of arranging outward which characterized in that: the coal dust anti-settling device is located in a shaft of a coal bed gas extraction well, the liquid injection assembly and the liquid discharge assembly are located on the upper portion of the coal bed gas extraction well and outside the coal bed gas extraction well, the coal dust anti-settling device is coaxially connected to the lower end of an extraction rod, the liquid injection assembly and the liquid discharge assembly are both connected with the upper portion of the extraction rod, the liquid injection assembly can inject anti-settling agent liquid into the coal dust anti-settling device in a pulse pressure mode through the extraction rod, and the liquid discharge assembly can discharge the anti-settling agent liquid discharged by the coal dust anti-settling device through the extraction rod.
2. The coal mining powder discharging device for coal bed methane mining according to claim 1, characterized in that: the pulverized coal anti-settling device comprises a plurality of injection disks which are arranged at intervals from top to bottom, each injection disk is of an annular structure, each two adjacent injection disks are connected with one injection bag body, a plurality of liquid outlet holes are uniformly formed in the outer circle surface of each injection disk along the circumferential direction, and the pore sizes of the liquid outlet holes of the plurality of injection disks are different.
3. The coal mining powder discharging device for coal bed methane mining according to claim 2, characterized in that: the liquid injection bag body is of a cavity structure with large cross sections at the upper end and the lower end and small cross section in the middle, a liquid outlet pipe is arranged at the lowest end of the pulverized coal anti-settling device, and a control valve is arranged on the liquid outlet pipe.
4. The coal mining powder discharging device for coal bed methane mining according to claim 2, characterized in that: the liquid injection sac body of the pulverized coal anti-settling device is made of corrosion-resistant rubber materials and has certain elasticity so as to realize telescopic adjustment under the pulse pressure of the liquid injection assembly.
5. The coal mining powder discharging device for coal bed methane mining according to claim 1, characterized in that: the top of the coal dust anti-settling device is connected with the lower end of the extraction rod through a hollow connecting column.
6. The coal mining powder discharging device for coal bed methane mining according to claim 1, characterized in that: annotate the liquid subassembly and include the liquid pump, annotate the liquid pipe, annotate the liquid joint and annotate the liquid flowmeter, the liquid pump passes through annotate the liquid pipe and annotate the liquid joint and be connected with the upper portion of adopting the pole, annotate the liquid flowmeter and install on annotating the liquid pipe.
7. The coal mining powder discharging device for coal bed methane mining according to claim 6, characterized in that: the drainage assembly comprises a drainage pump, a drainage pipe, a drainage connector and a drainage flowmeter, wherein the drainage pump is connected with the upper part of the extraction rod through the drainage pipe and the drainage connector, and the drainage flowmeter is arranged on the drainage pipe.
8. The coal mining powder discharging device for coal bed methane mining according to claim 7, characterized in that: the liquid pump and the liquid pump are controlled by the controller, the controller controls the liquid pump and the liquid pump to work intermittently, and the work pace of the liquid pump lags behind that of the liquid pump.
9. The coal mining powder discharging device for coal bed methane mining according to claim 2, characterized in that: the cross sections of the upper end and the lower end of the liquid injection bag body are the same as the outer diameter of the injection disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923273.6A CN110593781B (en) | 2019-09-27 | 2019-09-27 | Coal powder discharging device for coal bed gas exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923273.6A CN110593781B (en) | 2019-09-27 | 2019-09-27 | Coal powder discharging device for coal bed gas exploitation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110593781A true CN110593781A (en) | 2019-12-20 |
| CN110593781B CN110593781B (en) | 2021-04-09 |
Family
ID=68864127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910923273.6A Active CN110593781B (en) | 2019-09-27 | 2019-09-27 | Coal powder discharging device for coal bed gas exploitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110593781B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030221836A1 (en) * | 2001-01-29 | 2003-12-04 | Robert Gardes | Multi seam coal bed/methane dewatering and depressurizing production system |
| CN105672916A (en) * | 2016-04-15 | 2016-06-15 | 中国地质大学（武汉） | Composite geothermal well washing tool and well washing technology method |
| CN108019168A (en) * | 2016-10-28 | 2018-05-11 | 中国石油大学(北京) | Coal bed gas well coal dust suspending agent injection device |
| CN109252820A (en) * | 2018-10-24 | 2019-01-22 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method of the efficient row's of the returning coal dust of coal bed gas well |
| CN110094175A (en) * | 2019-05-30 | 2019-08-06 | 中国海洋石油集团有限公司 | A kind of control coal dust method of coal bed gas well |
-
2019
- 2019-09-27 CN CN201910923273.6A patent/CN110593781B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030221836A1 (en) * | 2001-01-29 | 2003-12-04 | Robert Gardes | Multi seam coal bed/methane dewatering and depressurizing production system |
| CN105672916A (en) * | 2016-04-15 | 2016-06-15 | 中国地质大学（武汉） | Composite geothermal well washing tool and well washing technology method |
| CN108019168A (en) * | 2016-10-28 | 2018-05-11 | 中国石油大学(北京) | Coal bed gas well coal dust suspending agent injection device |
| CN109252820A (en) * | 2018-10-24 | 2019-01-22 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method of the efficient row's of the returning coal dust of coal bed gas well |
| CN110094175A (en) * | 2019-05-30 | 2019-08-06 | 中国海洋石油集团有限公司 | A kind of control coal dust method of coal bed gas well |
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| Publication number | Publication date |
|---|---|
| CN110593781B (en) | 2021-04-09 |
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