CN114704229A - Sealing and leakage plugging equipment for gas extraction - Google Patents
Sealing and leakage plugging equipment for gas extraction Download PDFInfo
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- CN114704229A CN114704229A CN202210373416.2A CN202210373416A CN114704229A CN 114704229 A CN114704229 A CN 114704229A CN 202210373416 A CN202210373416 A CN 202210373416A CN 114704229 A CN114704229 A CN 114704229A
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- 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
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- 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
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/05—Cementing-heads, e.g. having provision for introducing cementing plugs
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Geophysics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses sealing and leakage plugging equipment for gas extraction, which relates to the technical field of gas extraction, and comprises a horizontal well, a leakage plugging device and a leakage plugging device, wherein the horizontal well is arranged in a rock stratum and is positioned above the coal stratum; the vertical well is vertically arranged in the rock stratum and communicated with the horizontal well; the extraction equipment is fixedly arranged at an outlet of the vertical well and is used for extracting gas in the well; the sealing assembly is fixed at the outlet ends of the horizontal well and the vertical well; and the plugging assembly is arranged on the outer wall of the sealing assembly and is used for extracting gas leaked due to the cracked slurry. According to the invention, the horizontal well and the vertical well can be sealed through the sealing assembly, gas leakage is avoided, and the gas leaked due to slurry cracking can be extracted through the plugging assembly, so that the safety of gas extraction is improved.
Description
Technical Field
The invention relates to the technical field of gas extraction, in particular to sealing and leakage plugging equipment for gas extraction.
Background
The gas extraction is to drill a coal seam and a gas gathering area, connect a drill hole on a special pipeline, and extract the gas in the coal seam and a goaf to the ground by extraction equipment for utilization.
Need use the hole packer to seal up drilling after the completion of driling, avoid gas to reveal, nevertheless take out the back to gas for a long time, can lead to the rock stratum not hard up because of the pressure that exists to make the interior thick liquids of hole packer appear the crack, lead to gas to reveal, easily take place danger, need reveal the shutoff, but its shutoff can not in time go on, can lead to partial gas to spill over, thereby cause the influence to the shutoff.
Aiming at the problems, the invention provides sealing and leakage plugging equipment for gas extraction, and aims to solve the problems.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: a sealed and shutoff equipment that leaks for gas drainage includes:
the horizontal well is arranged in the coal seam and is positioned above the coal seam;
the vertical well is vertically arranged in the rock stratum and communicated with the horizontal well;
the extraction equipment is fixedly arranged at an outlet of the vertical well and is used for extracting gas in the well;
the sealing assembly is fixed at the outlet ends of the horizontal well and the vertical well; and
and the plugging component is arranged on the outer wall of the sealing component and used for extracting gas leaked due to the cracked slurry.
Further, preferably, the seal assembly includes:
one end of the extraction pipe is fixed at the output end of the extraction equipment, and the other end of the extraction pipe is provided with an extraction inlet;
the first hole packer is fixed on the outer wall of the extraction pipe at a position far away from an extraction inlet; and
the second hole packer is fixed on the position, close to the extraction inlet, of the outer wall of the extraction pipe;
and the first hole packer and the second hole packer are sealed through grouting.
Further, preferably, a plurality of extraction holes are formed in the circumference of the extraction pipe above the first hole packer, and the extraction holes are plugged through a plugging assembly.
Further, preferably, the plugging assembly comprises:
the fixing ring is fixed at one end of the extraction pipe close to the extraction equipment;
the sliding ring is arranged on the outer wall of the extraction pipe in a sliding mode, and a plugging spring is connected between the sliding ring and the fixing ring;
the compression ring is fixed at the bottom of the sliding ring;
the pressure relief assembly is arranged inside the pressure receiving ring; and
the plugging ring is fixed at the bottom of the pressed ring and used for plugging the extraction hole in a static state;
and the contact positions of the compression ring and the plugging ring with the sealing component are both provided with rubber sealing rings.
Further, it is preferred, the bottom that receives the pressure ring is the arcwall face, can make the gas of leaking lead to collect.
Further, preferably, the pressure relief assembly includes:
the pressure relief bin is annular and is arranged inside the pressure receiving ring, and a pressure relief inlet and a pressure relief outlet are formed in one side of the pressure relief bin;
the limiting column is arranged on one side, close to the pressure relief inlet, of the pressure receiving ring in a vertically sliding mode; and a return spring is arranged between the compression ring and the compression ring;
the limiting plate is arranged inside the pressure receiving ring in a left-right sliding mode, penetrates through the pressure relief inlet and is used for plugging the pressure relief inlet; and
and the pressing spring is connected to one end, far away from the limiting post, of the limiting plate and is used for keeping the limiting plate and the limiting post in contact constantly.
Further, preferably, a pressure sensor is fixed at the bottom end inside the pressure relief bin, the pressure sensor is used for controlling the extraction rate of extraction equipment, and a one-way valve is fixed in a pressure relief outlet of the pressure relief bin.
Further, preferably, one side of the limiting column, which is in contact with the limiting plate, is an inclined plane for controlling the limiting plate to slide left and right, and the elastic coefficient of the return spring is greater than that of the pressing spring.
Further, it is preferred, the limiting plate with spacing post contact one end is rotated and is provided with the gyro wheel for reduce the friction between limiting plate and the spacing post, just a plurality of gas inlets have been seted up to the limiting plate near the position of pressing spring, and are a plurality of gas inlet all with pressure release entry parallel arrangement.
Compared with the prior art, the invention provides sealing and leakage plugging equipment for gas extraction, which has the following beneficial effects:
according to the invention, when a horizontal well and a vertical well are sealed, sealing is carried out by a two-plugging one-injecting method, namely, primary sealing is carried out by a first hole packer and a second hole packer, and slurry is injected into the first hole packer and the second hole packer for secondary sealing, but after long-time use, the slurry can generate cracks due to the looseness of a rock stratum, so that gas leakage is caused, at the moment, the leaked gas is plugged by a plugging assembly, so that the timeliness of gas plugging is improved, and when the gas leakage amount is excessive during plugging, a compression ring is pushed to slide upwards, so that an extraction hole is exposed, and the leaked gas is extracted;
in order to prevent the excessive gas quantity between the first hole packer and the pressed ring, so that the rock stratum is pressed for a long time and the plugging component fails, the pressure relief component is further arranged, when the pressed ring slides to the limit position, the limiting column in the pressed ring is in contact with the bottom of the fixing ring, so that the limiting column slides downwards, the limiting plate synchronously moves along with the limiting column, the gas inlet corresponds to the pressure relief inlet, so that the gas enters the pressure relief bin to be relieved, the extraction rate of extraction equipment can be controlled through the pressure sensor in the pressure relief bin, and the plugging effect is improved.
Drawings
Fig. 1 is an overall schematic view of a sealing and leakage plugging apparatus for gas extraction;
FIG. 2 is a schematic view of a sealing assembly and a plugging assembly of a sealing and leakage plugging apparatus for gas extraction;
FIG. 3 is an enlarged schematic view of a plugging assembly of a sealing and leak plugging apparatus for gas extraction;
FIG. 4 is a schematic view of a pressure relief assembly of a sealing and leak plugging apparatus for gas extraction;
in the figure: 1. a horizontal well; 2. a vertical well; 3. extracting equipment; 4. a seal assembly; 5. a plugging component; 41. extracting pipes; 42. a first hole packer; 43. a second hole packer; 44. extracting holes; 51. a fixing ring; 52. a slip ring; 53. plugging the spring; 54. a compression ring; 55. a plugging ring; 56. a pressure relief assembly; 561. a pressure relief bin; 562. a limiting column; 563. a return spring; 564. a limiting plate; 565. a pressing spring; 566. a pressure sensor; 567. a one-way valve.
Detailed Description
Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a sealed and block equipment that reveals for gas drainage, includes:
the horizontal well 1 is arranged in the coal seam and is positioned above the coal seam;
the vertical well 2 is vertically arranged in the rock stratum and communicated with the horizontal well 1;
the extraction equipment 3 is fixedly arranged at an outlet of the vertical well 2 and is used for extracting gas in the well;
the sealing assembly 4 is fixed at the outlet ends of the horizontal well 1 and the vertical well 2; and
and the plugging component 5 is arranged on the outer wall of the sealing component 4 and used for extracting gas leaked due to the cracked slurry.
In the present embodiment, the seal assembly 4 includes:
one end of the extraction pipe 41 is fixed at the output end of the extraction equipment 3, and the other end of the extraction pipe is provided with an extraction inlet;
the first hole packer 42 is fixed on the position, far away from the extraction inlet, of the outer wall of the extraction pipe 41; and
the second hole packer 43 is fixed on the outer wall of the extraction pipe 41 close to the extraction inlet;
the first hole packer 42 and the second hole packer 43 are sealed by grouting.
That is, although a commonly used two-pack one-pack sealing method is a method in which the first sealing can be performed by the first sealing device 42 and the second sealing device 43 and the second sealing can be performed by injecting the slurry into the first sealing device 42 and the second sealing device 43, the slurry is cracked due to the loosening of the rock layer after a long time use, and the gas leaks.
In a preferred embodiment, a plurality of extraction holes 44 are circumferentially formed in the extraction pipe 41 above the first hole packer 42, and the extraction holes 44 are plugged by the plugging component 5.
That is, when gas starts to leak, it can be stored between the plugging assembly 5 and the first hole packer 42, avoiding gas from overflowing.
As a preferred embodiment, the plugging assembly 5 comprises:
the fixing ring 51 is fixed at one end, close to the extraction equipment 3, of the extraction pipe 41;
the sliding ring 52 is arranged on the outer wall of the extraction pipe 41 in a sliding mode, and a plugging spring 53 is connected between the sliding ring and the fixing ring 51;
a pressure receiving ring 54 fixed to the bottom of the slide ring 52;
a pressure relief assembly 56 opened inside the pressure receiving ring 54; and
the plugging ring 55 is fixed at the bottom of the pressure receiving ring 54 and is used for plugging the extraction hole 44 in a static state;
and the contact positions of the compression ring 54 and the plugging ring 55 with the sealing component 4 are both provided with rubber sealing rings.
In a preferred embodiment, the bottom of the pressure receiving ring 54 is an arc-shaped surface, so that leaked gas can be guided and collected. That is, when gas leaks, it can be stored between the plugging assembly 5 and the first hole packer 42, and when the leakage amount is excessive, it can push the pressure receiving ring 54 vertically upward through the arc-shaped surface to the middle position, thereby preventing the pressure receiving ring 54 from being skewed.
In a preferred embodiment, the pressure relief assembly 56 comprises:
a pressure relief bin 561, which is annular and is provided inside the pressure receiving ring 54, and a pressure relief inlet and a pressure relief outlet are provided on one side thereof;
a limiting column 562 which is arranged at one side of the pressure receiving ring 54 close to the pressure relief inlet in a vertically sliding manner; and a return spring 563 is arranged between the compression ring 54 and the compression ring;
a limiting plate 564, which is slidably arranged inside the pressure receiving ring 54 from left to right, and penetrates through the pressure relief inlet, for blocking the pressure relief inlet; and
and the pressing spring 565 is connected to one end of the limit plate 564 far away from the limit post 562 and is used for keeping the limit plate 564 in contact with the limit post 562 at any time.
As a preferred embodiment, a pressure sensor 566 is fixed at the bottom end inside the pressure relief bin 561, the pressure sensor 566 is used for controlling the extraction rate of the extraction equipment 3, and a one-way valve 567 is fixed in a pressure relief outlet of the pressure relief bin 561.
It should be noted that the pressure sensor 566 is a wireless transmission type sensor, and it is in a silent state when it is not under pressure, so as to avoid the loss of electric quantity and improve the use time.
In a preferred embodiment, the side of the position-limiting column 562 contacting the position-limiting plate 564 is an inclined plane for controlling the left and right sliding of the position-limiting plate 564, and the elastic coefficient of the return spring 563 is greater than the elastic coefficient of the pressing spring 564.
In a preferred embodiment, a roller is rotatably disposed at one end of the limiting plate 564 contacting the limiting post 562 for reducing friction between the limiting plate 564 and the limiting post 562, and a plurality of gas inlets are disposed at positions of the limiting plate 564 close to the pressing spring 565, and the plurality of gas inlets are all parallel to the pressure relief inlet.
It should be noted that, when the gas leakage amount can push the pressed ring 54 to the limit position, the limiting post 562 inside the pressed ring contacts with the bottom of the fixing ring 51, so that the limiting post 562 slides downwards, the limiting plate 564 moves synchronously with the limiting post 562 at this time, and the gas inlet corresponds to the pressure relief inlet, so that the gas enters the pressure relief bin 561 for pressure relief, and when the pressed ring 54 and the first hole packer 42 and the pressure relief bin 561 are filled with gas, the pressure sensor 566 is pressed at this time, and transmits a signal to the extraction equipment 3, so that the extraction rate is increased, and the extraction equipment 3 is prevented from being damaged due to high-power operation for a long time.
The method comprises the following specific steps:
s1, arranging a horizontal well 1 and a vertical well 2 at preset positions, and fracturing a coal bed in the horizontal well 1 by a fracturing method, so that gas flows into the horizontal well 1;
s2, sealing the horizontal well 1 and the vertical well 2 by a two-plugging one-injection method, and installing the extraction equipment 3 on an extraction pipe 41;
s3, when the injected slurry generates cracks, gas overflows from the cracks and is stored between the plugging component 5 and the first hole packer 42;
s4, when the leakage amount is excessive, the compression ring 54 can be pushed upwards, so that the extraction holes 44 in the extraction pipe 41 are exposed, and the leaked gas is extracted;
s5, when the leakage amount can push the pressure receiving ring 54 to the limit position, the limiting post 562 inside the pressure receiving ring is contacted with the bottom of the fixing ring 51, so that the limiting post 562 slides downwards, the limiting plate 564 moves synchronously with the limiting post 562 at the moment, and a gas inlet corresponds to a pressure relief inlet, so that gas enters the pressure relief bin 561 for pressure relief;
s6, when the pressure ring 54 and the first hole packer 42 and the pressure relief bin 561 are filled with gas, the pressure sensor 566 is pressed at the moment and transmits signals to the extraction equipment 3, so that the extraction rate is improved, and the gas is prevented from leaking.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (9)
1. The utility model provides a sealed and block up equipment of revealing for gas drainage which characterized in that: the method comprises the following steps:
the horizontal well (1) is arranged in the coal seam and is positioned above the coal seam;
the vertical well (2) is vertically arranged in the rock stratum and is communicated with the horizontal well (1);
the extraction equipment (3) is fixedly arranged at an outlet of the vertical well (2) and is used for extracting gas in the well;
the sealing assembly (4) is fixed at the outlet ends of the horizontal well (1) and the vertical well (2); and
and the plugging component (5) is arranged on the outer wall of the sealing component (4) and is used for extracting gas leaked due to the cracked slurry.
2. The sealing and leakage plugging device for gas extraction according to claim 1, characterized in that: the sealing assembly (4) comprises:
one end of the extraction pipe (41) is fixed at the output end of the extraction equipment (3), and the other end of the extraction pipe is provided with an extraction inlet;
the first hole packer (42) is fixed at the position, far away from the extraction inlet, of the outer wall of the extraction pipe (41); and
the second hole packer (43) is fixed at the position, close to the extraction inlet, of the outer wall of the extraction pipe (41);
the first hole packer (42) and the second hole packer (43) are sealed by grouting.
3. The sealing and leakage plugging device for gas extraction according to claim 2, characterized in that: the extraction pipe (41) is located above the first hole packer (42) and is circumferentially provided with a plurality of extraction holes (44), and the extraction holes (44) are plugged through a plugging component (5).
4. The sealing and leakage plugging device for gas extraction according to claim 3, characterized in that: the plugging assembly (5) comprises:
the fixing ring (51) is fixed at one end, close to the extraction equipment (3), of the extraction pipe (41);
the sliding ring (52) is arranged on the outer wall of the extraction pipe (41) in a sliding mode, and a plugging spring (53) is connected between the sliding ring and the fixing ring (51);
a pressure receiving ring (54) fixed to the bottom of the slide ring (52);
a pressure relief assembly (56) opening inside the pressure receiving ring (54); and
the plugging ring (55) is fixed at the bottom of the pressure receiving ring (54) and is used for plugging the extraction hole (44) in a static state;
and the contact positions of the compression ring (54) and the plugging ring (55) with the sealing component (4) are both provided with rubber sealing rings.
5. The sealing and leakage plugging device for gas extraction according to claim 4, characterized in that: the bottom of the compression ring (54) is an arc-shaped surface, so that leaked gas can be guided and collected.
6. The sealing and leakage plugging device for gas extraction according to claim 4, characterized in that: the pressure relief assembly (56) includes:
the pressure relief bin (561) is annular and is arranged inside the pressure receiving ring (54), and a pressure relief inlet and a pressure relief outlet are formed in one side of the pressure relief bin;
the limiting column (562) is arranged on one side, close to the pressure relief inlet, in the pressure receiving ring (54) in a vertically sliding manner; and a return spring (563) is arranged between the compression ring (54) and the compression ring;
the limiting plate (564) is arranged inside the pressure receiving ring (54) in a left-right sliding mode, penetrates through the pressure relief inlet and is used for blocking the pressure relief inlet; and
and the pressing spring (565) is connected to one end, far away from the limiting post (562), of the limiting plate (564) and is used for keeping the limiting plate (564) in contact with the limiting post (562) at any time.
7. The sealing and leakage plugging equipment for gas extraction according to claim 6, characterized in that: a pressure sensor (566) is fixed at the bottom end inside the pressure relief bin (561), the pressure sensor (566) is used for controlling the extraction rate of extraction equipment (3), and a one-way valve (567) is fixed in a pressure relief outlet of the pressure relief bin (561).
8. The sealing and leakage plugging device for gas extraction according to claim 6, characterized in that: the contact side of the limiting column (562) and the limiting plate (564) is an inclined slope for controlling the left-right sliding of the limiting plate (564), and the elastic coefficient of the return spring (563) is greater than that of the pressing spring (564).
9. The sealing and leakage plugging device for gas extraction according to claim 6, characterized in that: limiting plate (564) with spacing post (562) contact one end is rotated and is provided with the gyro wheel for reduce the friction between limiting plate (564) and spacing post (562), just a plurality of gas inlets have been seted up to limiting plate (564) near the position of pressing spring (565), and it is a plurality of gas inlet all with pressure release inlet parallel arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373416.2A CN114704229B (en) | 2022-04-11 | 2022-04-11 | Sealing and leakage plugging equipment for gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373416.2A CN114704229B (en) | 2022-04-11 | 2022-04-11 | Sealing and leakage plugging equipment for gas extraction |
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| Publication Number | Publication Date |
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| CN114704229A true CN114704229A (en) | 2022-07-05 |
| CN114704229B CN114704229B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210373416.2A Active CN114704229B (en) | 2022-04-11 | 2022-04-11 | Sealing and leakage plugging equipment for gas extraction |
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Citations (9)
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|---|---|---|---|---|
| AU2892384A (en) * | 1983-06-01 | 1984-12-06 | Towner, Geoffrey Ferguson | Well sealing means |
| AU2004202956A1 (en) * | 2000-04-24 | 2004-07-29 | Shell Internationale Research Maatschappij B.V. | In Situ Recovery From a Hydrocarbon Containing Formation |
| CN102003173A (en) * | 2010-10-29 | 2011-04-06 | 北京中矿天安科技发展有限公司 | System and method for automatically measuring and recording gas pressure during coal seam hole sealing |
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2022
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|---|---|---|---|---|
| AU2892384A (en) * | 1983-06-01 | 1984-12-06 | Towner, Geoffrey Ferguson | Well sealing means |
| AU2004202956A1 (en) * | 2000-04-24 | 2004-07-29 | Shell Internationale Research Maatschappij B.V. | In Situ Recovery From a Hydrocarbon Containing Formation |
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| CN205314955U (en) * | 2015-12-21 | 2016-06-15 | 河南理工大学 | Hole sealing device for improving gas extraction concentration |
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| CN209277931U (en) * | 2018-11-23 | 2019-08-20 | 山西马堡煤业有限公司 | A kind of this coal bed gas extraction of underground coal mine drilling integrated apparatus |
| CN214889720U (en) * | 2021-05-06 | 2021-11-26 | 重庆工程职业技术学院 | Be used for gas drainage sealed with revealing plugging device |
| CN114263449A (en) * | 2021-12-14 | 2022-04-01 | 中国矿业大学 | High-efficient gas drainage device based on hydraulic fracturing |
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| 杨翠婷;: "突出煤层"两堵一注"高水材料瓦斯封孔技术研究及应用", 能源技术与管理, no. 03 * |
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|---|---|
| CN114704229B (en) | 2023-10-03 |
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