CN107780873B - Three-section type capsule sealing device for gas extraction drilling and sealing method thereof - Google Patents
Three-section type capsule sealing device for gas extraction drilling and sealing method thereof Download PDFInfo
- Publication number
- CN107780873B CN107780873B CN201710994671.8A CN201710994671A CN107780873B CN 107780873 B CN107780873 B CN 107780873B CN 201710994671 A CN201710994671 A CN 201710994671A CN 107780873 B CN107780873 B CN 107780873B
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- China
- Prior art keywords
- capsule
- sealing
- grouting
- gas extraction
- slurry
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- 239000002775 capsule Substances 0.000 title claims abstract description 103
- 238000007789 sealing Methods 0.000 title claims abstract description 84
- 238000000605 extraction Methods 0.000 title claims abstract description 45
- 238000005553 drilling Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 51
- 239000004033 plastic Substances 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 23
- 238000005422 blasting Methods 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims 1
- 239000003245 coal Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 238000005065 mining Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
Abstract
The utility model provides a three-section type capsule sealing device of gas extraction drilling and sealing method thereof, belongs to gas extraction drilling sealing technical field, and the technical problem that solves provides a colliery gas extraction drilling sealing device with low costs, effectual and sealing method, the technical scheme who adopts: the first capsule and the second capsule are respectively connected to the two ends of the gas extraction pipe through connecting pieces; the first capsule comprises a first plastic pipe fitting, a first capsule body and a blasting valve, wherein the first capsule body is wrapped outside a groove in the middle of the first plastic pipe fitting, a first grouting opening is formed in the joint of one end of the first capsule body and the groove, a slurry outlet and the blasting valve are formed in the joint of the other end of the first capsule body and the groove, a second capsule body is wrapped outside the groove in the middle of the second plastic pipe fitting, and a second grouting opening is formed in the joint of one end of the second capsule body and the groove.
Description
Technical Field
A three-section type capsule sealing device and a sealing method for gas extraction drilling holes belong to the technical field of gas extraction drilling hole sealing in places such as underground coal mining working surfaces, cross-cut coal uncovering places, coal roadways and the like.
Background
The gas disaster is one of main natural disasters of coal mines in China, so that the gas disaster becomes a main contradiction for restricting the safe production of the coal mines at present, and meanwhile, the gas management is a key place of the green mining of the coal mines in China, wherein the gas extraction technology through construction drilling is an effective means for comprehensively preventing and controlling the gas. In coal mine gas extraction work, the hole sealing quality of a drill hole is a key factor influencing the extraction effect.
At present, the gas extraction drilling sealing method for the coal mine mainly comprises the following steps: traditional sealing with two plugs and one injection and polyurethane sealing. The problem of the traditional two-plug one-injection hole sealing method is mainly expressed in that: the plug is an independent process in the process of 'two plugs and one injection', and firstly, the plug is needed, so that the problems of complex working procedures and increased workload are caused; the two plugs have low strength, low plugging strength and poor effect, grouting pressure is not high, even the holes are not sealed by pressing, tight plugging of the peripheral cracks of the drilled holes cannot be realized, and the aim of 'grouting' cannot be achieved. Polyurethane sealing is often insufficient in sealing length and difficult to permeate into a drilling crack so as to not achieve an ideal sealing state, and sealing materials have certain toxicity and high price, so that the sealing cost is high and a coal mine is difficult to bear. Therefore, in order to solve the sealing problem of the gas extraction drilling hole, a brand new sealing structure and method are urgently required to be sought, and the sealing requirement of the underground high-quality drilling hole of the coal mine is met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a coal mine gas extraction drilling sealing device and a sealing method with low cost and good effect.
In order to solve the technical problems, the invention adopts the technical scheme that: a three-section type capsule sealing device of a gas extraction drill hole comprises a first capsule, a gas extraction pipe, a second capsule and a connecting piece;
the first capsule and the second capsule are respectively connected to the two ends of the gas extraction pipe through connecting pieces;
the first capsule comprises a first plastic pipe fitting, a first capsule body and a blasting valve, wherein the middle part of the first plastic pipe fitting is provided with a groove, the first capsule body is wrapped outside the groove, a first grouting port is arranged at the joint of one end of the first capsule body and the groove, a slurry outlet and the blasting valve are arranged at the joint of the other end of the first capsule body and the groove, the first grouting port and the slurry outlet are both positioned above the blasting valve, and one end provided with the first grouting port is far away from a gas extraction pipe, and one end provided with the slurry outlet is close to the gas extraction pipe;
the second capsule comprises a second plastic pipe fitting and a second capsule body, the middle part of the second plastic pipe fitting is provided with a groove, the second capsule body is wrapped outside the groove, a second grouting port is arranged at the joint of one end of the second capsule body and the groove, and one end provided with the second grouting port is close to a gas extraction pipe.
The first grouting port, the second grouting port and the slurry outlet are quick plug ports which can be quickly connected with the pipeline.
The first plastic pipe fitting and the second plastic pipe fitting are both made of high-strength polyethylene materials;
the first capsule body and the second capsule body are made of ethylene propylene rubber with high elasticity, heat resistance and aging resistance.
The sealing method of the three-section type capsule sealing device for the gas extraction drilling hole comprises the following steps: the first step, the first capsule, the gas extraction pipe and the second capsule are connected through a connecting piece, and the slurry outlet is connected with a second slurry injection port through a slurry injection pipe;
secondly, feeding the first capsule, the gas extraction pipe and the second capsule which are connected in the first step into a drill hole;
thirdly, connecting the first grouting port with a grouting pump outside the drilling hole, and starting the grouting pump;
fourthly, injecting the sealing slurry into the first capsule through the grouting pump, and injecting the sealing slurry into the second capsule along the grouting pipe after the first capsule is filled;
fifthly, continuously injecting sealing slurry until the first capsule body and the second capsule body expand under the pressure of the sealing slurry and are tightly attached to the wall of the drilling hole;
sixthly, continuously injecting the sealing slurry until the pressure of the sealing slurry opens a burst valve, so that the sealing slurry is injected into a hole sealing area;
seventh, after the sealing slurry is filled in the hole sealing area, the sealing slurry is permeated into cracks around the drill hole under the pressure action until the cracks are filled with the sealing slurry;
and eighth, after the cracks around the drill holes are fully filled with the sealing slurry, closing the grouting pump, and stopping the injection of the sealing slurry.
Compared with the prior art, the invention has the following beneficial effects.
1. According to the invention, through the three-section design of the first capsule, the gas extraction pipe and the second capsule, the process of blocking in the traditional two-blocking one-injection hole sealing process is omitted, the process procedure is simplified, and meanwhile, the three sections are directly connected through the connecting piece to form the hole sealing section, so that the method is more convenient and faster.
2. The invention has simple structure, reasonable design, convenient operation, low cost and obvious sealing effect, can effectively seal the drill hole and the peripheral cracks thereof, and improves the gas extraction effect.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the first capsule.
Fig. 3 is a schematic structural view of a second capsule.
Fig. 4 is a view showing the state of use of the first capsule body and the second capsule body after inflation.
In the figure, 1 is a first capsule, 2 is a gas extraction pipe, 3 is a second capsule, 4 is a connecting piece, 5 is a grouting pipe, 6 is a drilling hole, 7 is a grouting pump, 8 is a sealing slurry, 9 is a hole sealing area, 11 is a first plastic pipe fitting, 12 is a first capsule body, 13 is a blasting valve, 14 is a first grouting port, 15 is a grouting port, 31 is a second plastic pipe fitting, 32 is a second capsule body, and 33 is a second grouting port.
Detailed Description
As shown in fig. 1-4, a three-section capsule sealing device of a gas extraction drill hole comprises a first capsule 1, a gas extraction pipe 2, a second capsule 3 and a connecting piece 4;
the first capsule 1 and the second capsule 3 are respectively connected to two ends of the gas extraction pipe 2 through a connecting piece 4;
the first capsule 1 comprises a first plastic pipe fitting 11, a first capsule body 12 and a blasting valve 13, wherein the middle part of the first plastic pipe fitting 11 is provided with a groove, the first capsule body 12 is wrapped outside the groove, a first grouting opening 14 is arranged at the joint of one end of the first capsule body 12 and the groove, a slurry outlet 15 and the blasting valve 13 are arranged at the joint of the other end of the first capsule body and the groove, the first grouting opening 14 and the slurry outlet 15 are both positioned above the blasting valve 13, and one end provided with the first grouting opening 14 is far away from the gas extraction pipe 2, and one end provided with the slurry outlet 15 is close to the gas extraction pipe 2;
the second capsule 3 comprises a second plastic pipe fitting 31 and a second capsule body 32, a groove is formed in the middle of the second plastic pipe fitting 31, the second capsule body 32 is wrapped outside the groove, a second grouting port 33 is formed at the joint of one end of the second capsule body 32 and the groove, and one end provided with the second grouting port 33 is close to the gas extraction pipe 2.
The first grouting port 14, the second grouting port 33 and the grouting outlet 15 are quick plug-in ports which can be quickly connected with the pipeline.
The first plastic pipe fitting 11 and the second plastic pipe fitting 31 are made of high-strength polyethylene materials;
the first capsule body 12 and the second capsule body 32 are made of ethylene propylene rubber with high elasticity, heat resistance and aging resistance.
The sealing method of the three-section type capsule sealing device for the gas extraction drilling hole comprises the following steps: the first step, the first capsule 1, the gas extraction pipe 2 and the second capsule 3 are connected through a connecting piece 4, and a grouting pipe 5 is used for connecting a grouting outlet 15 with a second grouting outlet 33;
secondly, the first capsule 1, the gas extraction pipe 2 and the second capsule 3 which are connected in the first step are sent into a drilling hole 6;
thirdly, connecting the first grouting port 14 with a grouting pump 7 outside the drilling hole 6, and starting the grouting pump 7;
fourthly, starting to inject the sealing slurry 8 into the first capsule 1 through the grouting pump 7, and injecting the sealing slurry 8 into the second capsule along the grouting pipe 5 after the first capsule 1 is filled;
fifth, continuously injecting the sealing slurry 8 until the first capsule body 12 and the second capsule body 32 expand under the pressure of the sealing slurry 8 and are tightly attached to the wall of the drilling hole 6;
sixthly, continuously injecting the sealing slurry 8 until the pressure of the sealing slurry 8 opens the explosion valve 13, so that the sealing slurry 8 is injected into the hole sealing area 9;
seventh, after the sealing slurry 8 is filled in the hole sealing area 9, the sealing slurry 8 is then permeated into cracks around the drilling hole 6 under the action of pressure until the cracks are filled in the sealing slurry 8;
and eighth, after the cracks around the drilling holes 6 are fully filled with the sealing slurry 8, the grouting pump 7 is closed, and the injection of the sealing slurry 8 is stopped.
The above-described embodiments are intended to be illustrative of the structure of the present invention and not limiting, and modifications may be made without departing from the principles of the present invention.
Claims (4)
1. The utility model provides a syllogic capsule sealing device of gas drainage drilling which characterized in that: comprises a first capsule (1), a gas extraction pipe (2), a second capsule (3), a connecting piece (4) and a grouting pipe (5);
the first capsule (1) and the second capsule (3) are respectively connected to two ends of the gas extraction pipe (2) through connecting pieces (4);
the first capsule (1) comprises a first plastic pipe fitting (11), a first capsule body (12) and a blasting valve (13), wherein the middle part of the first plastic pipe fitting (11) is provided with a groove, the first capsule body (12) is wrapped outside the groove, a first grouting port (14) is arranged at the joint of one end of the first capsule body (12) and the groove, a slurry outlet (15) and the blasting valve (13) are arranged at the joint of the other end of the first capsule body and the groove, the first grouting port (14) and the slurry outlet (15) are both positioned above the blasting valve (13), and one end provided with the first grouting port (14) is far away from the gas extraction pipe (2) and one end provided with the slurry outlet (15) is close to the gas extraction pipe (2);
the second capsule (3) comprises a second plastic pipe fitting (31) and a second capsule body (32), a groove is formed in the middle of the second plastic pipe fitting (31), the second capsule body (32) is wrapped outside the groove, a second grouting opening (33) is formed in the joint of one end of the second capsule body (32) and the groove, and one end provided with the second grouting opening (33) is close to the gas extraction pipe (2); the grout outlet (15) is connected with the second grouting port (33) through a grouting pipe (5).
2. The three-section capsule sealing device of a gas extraction borehole of claim 1, wherein: the first grouting port (14), the second grouting port (33) and the grouting outlet (15) are quick plug-in ports which can be quickly connected with a pipeline.
3. A three-stage capsule sealing device for gas extraction bore holes according to claim 1 or 2, characterized in that: the first plastic pipe fitting (11) and the second plastic pipe fitting (31) are made of high-strength polyethylene materials;
the first capsule body (12) and the second capsule body (32) are made of ethylene propylene rubber with high elasticity, heat resistance and aging resistance.
4. The sealing method of a three-stage capsule sealing device for gas extraction drilling according to claim 1, characterized by comprising the following steps: the first step, the first capsule (1), the gas extraction pipe (2) and the second capsule (3) are connected through a connecting piece (4), and a grouting pipe (5) is used for connecting a grouting outlet (15) with a second grouting outlet (33);
secondly, feeding the first capsule (1), the gas extraction pipe (2) and the second capsule (3) which are connected in the first step into a drilling hole (6);
thirdly, connecting the first grouting port (14) with a grouting pump (7) outside the drilling hole (6), and starting the grouting pump (7);
fourthly, injecting the sealing slurry (8) into the first capsule (1) through the grouting pump (7), and injecting the sealing slurry (8) into the second capsule along the grouting pipe (5) after the first capsule (1) is filled;
fifthly, continuously injecting the sealing slurry (8) until the first capsule body (12) and the second capsule body (32) expand under the pressure of the sealing slurry (8) and are tightly attached to the wall of the drilling hole (6);
sixthly, continuously injecting the sealing slurry (8) until the pressure of the sealing slurry (8) opens a blasting valve (13) so that the sealing slurry (8) is injected into a hole sealing area (9);
seventh, after the sealing slurry (8) is filled in the hole sealing area (9), the sealing slurry (8) is then permeated into cracks around the drilling hole (6) under the action of pressure until the cracks are filled in the sealing slurry (8);
and eighth, after the cracks around the drilling holes (6) are fully filled with the sealing slurry (8), the grouting pump (7) is closed, and the injection of the sealing slurry (8) is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710994671.8A CN107780873B (en) | 2017-10-23 | 2017-10-23 | Three-section type capsule sealing device for gas extraction drilling and sealing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710994671.8A CN107780873B (en) | 2017-10-23 | 2017-10-23 | Three-section type capsule sealing device for gas extraction drilling and sealing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107780873A CN107780873A (en) | 2018-03-09 |
| CN107780873B true CN107780873B (en) | 2023-11-28 |
Family
ID=61435057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710994671.8A Active CN107780873B (en) | 2017-10-23 | 2017-10-23 | Three-section type capsule sealing device for gas extraction drilling and sealing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107780873B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761734B (en) * | 2019-12-06 | 2021-11-09 | 山西潞安矿业(集团)有限责任公司 | Sealing method of sealing device for drilling high-gas soft coal seam |
| CN113187537B (en) * | 2021-05-31 | 2023-05-16 | 陕西陕煤铜川矿业有限公司 | Gas extraction drilling hole sealing device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966370A (en) * | 2011-09-01 | 2013-03-13 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN104343411A (en) * | 2013-07-23 | 2015-02-11 | 蔡长辉 | Hole sealing device for rapidly sealing drill holes |
| CN105696967A (en) * | 2016-01-21 | 2016-06-22 | 淮南久辉工贸有限责任公司 | Mining hole packer and hole packing method |
| CN105804691A (en) * | 2016-03-28 | 2016-07-27 | 中国矿业大学 | Pipe-free hole sealing method for mining gas extraction drill hole |
| CN107100583A (en) * | 2017-05-09 | 2017-08-29 | 河北拓安管业有限公司 | A kind of fast hard mining hole packer of filter-press type and its application method |
-
2017
- 2017-10-23 CN CN201710994671.8A patent/CN107780873B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966370A (en) * | 2011-09-01 | 2013-03-13 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN104343411A (en) * | 2013-07-23 | 2015-02-11 | 蔡长辉 | Hole sealing device for rapidly sealing drill holes |
| CN105696967A (en) * | 2016-01-21 | 2016-06-22 | 淮南久辉工贸有限责任公司 | Mining hole packer and hole packing method |
| CN105804691A (en) * | 2016-03-28 | 2016-07-27 | 中国矿业大学 | Pipe-free hole sealing method for mining gas extraction drill hole |
| CN107100583A (en) * | 2017-05-09 | 2017-08-29 | 河北拓安管业有限公司 | A kind of fast hard mining hole packer of filter-press type and its application method |
Non-Patent Citations (1)
| Title |
|---|
| "囊袋式带压封孔效果考察及影响因素分析";张福旺;《中国煤炭学会钻探工程专业委员会2017年钻探工程学术研讨会论文集》;第181-184页 * |
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| Publication number | Publication date |
|---|---|
| CN107780873A (en) | 2018-03-09 |
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