CN111485937A - Method for safely sealing gas extraction drill hole by utilizing polyurethane - Google Patents
Method for safely sealing gas extraction drill hole by utilizing polyurethane Download PDFInfo
- Publication number
- CN111485937A CN111485937A CN202010524674.7A CN202010524674A CN111485937A CN 111485937 A CN111485937 A CN 111485937A CN 202010524674 A CN202010524674 A CN 202010524674A CN 111485937 A CN111485937 A CN 111485937A
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- hole sealing
- polyurethane
- pipe
- hole
- gas extraction
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- 238000007789 sealing Methods 0.000 title claims abstract description 159
- 239000004814 polyurethane Substances 0.000 title claims abstract description 78
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 78
- 238000000605 extraction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000003566 sealing material Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 239000003094 microcapsule Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 6
- POOSGDOYLQNASK-UHFFFAOYSA-N tetracosane Chemical compound CCCCCCCCCCCCCCCCCCCCCCCC POOSGDOYLQNASK-UHFFFAOYSA-N 0.000 claims description 6
- FIGVVZUWCLSUEI-UHFFFAOYSA-N tricosane Chemical compound CCCCCCCCCCCCCCCCCCCCCCC FIGVVZUWCLSUEI-UHFFFAOYSA-N 0.000 claims description 6
- 239000011162 core material Substances 0.000 claims description 5
- 238000005187 foaming Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000004640 Melamine resin Substances 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 3
- HOWGUJZVBDQJKV-UHFFFAOYSA-N n-propyl-nonadecane Natural products CCCCCCCCCCCCCCCCCCCCCC HOWGUJZVBDQJKV-UHFFFAOYSA-N 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000011049 filling Methods 0.000 abstract description 2
- 239000012782 phase change material Substances 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 5
- 239000002775 capsule Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a method for safely sealing a gas extraction drill hole by utilizing polyurethane, which is characterized in that drill cuttings in the drilling process of the gas extraction drill hole are made into aggregates in the polyurethane, so that the using amount of a polyurethane material is reduced, and the heat released by the reaction of the polyurethane material can be absorbed in time; the phase-change material microcapsules are doped into the polyurethane, so that the phase-change heat absorption effect is fully utilized to further absorb the heat emitted by the polyurethane; the hole sealing pipe of the gas extraction drill hole adopts an arrangement method of alternately connecting a conventional hole sealing pipe and a rough hole sealing pipe, and the diameter of the rough hole sealing pipe is larger, so that the volume of a sealed space is smaller, the using amount of a hole sealing material during filling the sealed space is further reduced, the heat productivity is reduced, the bonding force and the friction force of the hole sealing material and a hole wall and the hole sealing pipe can be effectively increased, and the hole sealing quality is improved; under the synergistic effect of the multiple modes, the reaction temperature of the polyurethane hole sealing material can be effectively reduced, so that the polyurethane is safely utilized for hole sealing, and the method has wide applicability.
Description
Technical Field
The invention relates to a method for sealing a gas extraction borehole, in particular to a method for safely sealing a gas extraction borehole by utilizing polyurethane.
Background
The gas extraction is a fundamental measure for preventing and treating gas accidents in coal mines, and the outburst danger and the gas overrun problem can be relieved and eliminated only by extracting a large amount of gas. The quality of the sealing quality of the drill hole after the construction of the gas extraction drill hole is one of the most key factors for determining the gas extraction rate. In view of this, in order to ensure long-term effectiveness of the gas extraction borehole, the 'drilled borehole' is the foundation for gas extraction from the borehole; the 'sealed hole' is the key point for extracting gas from the drilled hole. At present, the commonly adopted gas drilling hole sealing method for coal mines mainly comprises 2 methods: the polyurethane foam material seals the drilled hole and the cement mortar seals the drilled hole. The cement mortar hole sealing process adopts segmented sealing, and the cement is easy to form a gas passage, so that the gas leakage is serious, the labor intensity during construction is high, the extraction efficiency is low, and the pre-extraction time is long, so that the coal extraction efficiency is reduced. The polyurethane foaming material is used for sealing holes, and the self foaming pressure of the polyurethane material is utilized to enable the material to permeate into cracks of a rock wall (or a coal wall) of a drilled hole, so that the sealing quality can be greatly improved. The method has the advantages of small using amount of polyurethane materials, low construction labor intensity, good hole sealing effect and the like, and is popularized and applied in the aspect of gas drilling and hole sealing. Although the polyurethane hole sealing material has the advantages, the polyurethane hole sealing material has exothermic chemical reaction in the consolidation process, and the hole sealing material has excellent sealing performance, so that heat generated by the reaction cannot be released in time, the temperature of the foam core part is high, potential safety hazards such as spontaneous combustion, core burning and fuming are easy to occur, and further coal mine safety accidents caused by the potential safety hazards occur. Therefore, how to reduce the reaction temperature of the polyurethane hole sealing material and safely utilize polyurethane to seal holes becomes a difficult problem to be solved urgently in the industry.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for safely sealing a gas extraction drilled hole by utilizing polyurethane, which can effectively reduce the reaction temperature of a polyurethane hole sealing material, so that the polyurethane is safely utilized for hole sealing.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for safely sealing a gas extraction borehole by utilizing polyurethane comprises the following specific steps:
A. collecting drill cuttings in the drilling process of the gas extraction drill hole, and placing the collected drill cuttings on a combined screen for screening, wherein the combined screen is divided into an upper layer and a lower layer, the aperture of the upper layer is 3mm, and the aperture of the lower layer is 1 mm; in the screening process, continuously washing the combined screen by using high-pressure water, collecting drill cuttings on the lower layer of the combined screen and carrying out air drying;
B. selecting a plurality of conventional hole sealing pipes and a plurality of rough hole sealing pipes to be connected to form a combined hole sealing pipe, wherein the first conventional hole sealing pipe is used as the front end of the combined hole sealing pipe, one end of the first conventional hole sealing pipe is coaxially connected with one end of the first rough hole sealing pipe, the other end of the first rough hole sealing pipe is coaxially connected with one end of the second conventional hole sealing pipe, the conventional hole sealing pipes and the rough hole sealing pipes are alternately connected in such a repeated way until the total length of the combined hole sealing pipe reaches the hole sealing depth required by gas extraction drilling, and the rear end of the combined hole sealing pipe is ensured to be the last conventional hole sealing pipe;
C. binding a first group of polyurethane hole sealing bags on the outer circumferential surface of the first coarse hole sealing pipe, binding a second group of polyurethane hole sealing bags on the outer circumferential surface of the last coarse hole sealing pipe, and fixing a first grouting pipe on the second group of polyurethane hole sealing bags;
D. sequentially extruding a first group of polyurethane hole sealing bags and a second group of polyurethane hole sealing bags, after polyurethane materials in the two groups of hole sealing bags are fully mixed, sending the front end of the combined hole sealing pipe into a gas extraction drill hole, enabling the first group of polyurethane hole sealing bags and the second group of polyurethane hole sealing bags to be located at a gas extraction drill hole sealing section, after polyurethane in the two groups of polyurethane hole sealing bags is cured, enabling the two groups of polyurethane hole sealing bags and the wall of the gas extraction drill hole to form a sealing space in a surrounding mode, enabling one end of a first grouting pipe to be located in the sealing space, and enabling the other end of the first grouting pipe to be located outside the gas extraction drill hole, and accordingly completing primary hole sealing;
E. one end of a second grouting pipe penetrates through the first grouting pipe and extends into the sealed space, and the extension of one end of the second grouting pipe is stopped when the distance between the end of the second grouting pipe and the first group of polyurethane hole sealing bags is 0.1-0.15 m;
F. fully and uniformly mixing 35-45 parts by mass of the drill cuttings obtained in the step A, 20-30 parts by mass of a polyurethane A component, 25-33 parts by mass of a polyurethane B component and 5-10 parts by mass of a hole sealing material consisting of phase change microcapsules with a phase change temperature of 45-55 ℃, injecting the hole sealing material formed by mixing into a sealed space through a second grouting pipe, pulling out the second grouting pipe from a drill hole at a constant speed in the hole sealing material injection process, ensuring that the hole sealing material is uniformly distributed in the sealed space, stopping injecting and completely separating the second grouting pipe from the first grouting pipe until the hole sealing material overflows from the first grouting pipe, and then plugging the first grouting pipe; and finishing the sealing process of the gas extraction drill hole after the hole sealing material is subjected to foaming reaction in the sealed space.
Further, the diameter of the rough hole sealing pipe is 1.5-2 times that of a conventional hole sealing pipe and is smaller than 4/5 of the diameter of a gas extraction drill hole.
Furthermore, the rough hole sealing pipe and the conventional hole sealing pipe are connected through internal and external threads, and the lengths of the rough hole sealing pipe and the conventional hole sealing pipe are equal.
Further, the capsule wall material of the phase-change microcapsule is melamine resin, and the capsule core material is formed by mixing n-tricosane and n-tetracosane.
Compared with the prior art, the method disclosed by the invention has the advantages that the drill cuttings in the drilling process of the gas extraction drill hole are fully utilized, local materials are used, so that the drill cuttings become the aggregate in the polyurethane, the use amount of the polyurethane material is reduced by 35-45%, the heat released by the reaction of the polyurethane material can be absorbed in time, and the reaction temperature is reduced. Phase change material microcapsules with the phase change temperature of 45-55 ℃ are doped into the polyurethane, so that the phase change heat absorption effect is fully utilized to further absorb heat emitted by the polyurethane, and the reaction temperature is reduced. The combined hole sealing pipe of the gas extraction drill hole adopts an arrangement method of alternately connecting a conventional hole sealing pipe and a rough hole sealing pipe, and the diameter of the rough hole sealing pipe is larger, so that the volume of a sealed space is smaller, the using amount of hole sealing materials during filling the sealed space is further reduced, the heat productivity is reduced, the bonding force and the friction force of the hole sealing materials and a hole wall and the hole sealing pipe can be effectively increased, and the hole sealing quality is improved. The second grouting pipe is extracted out of the hole at a constant speed in the hole sealing material injection process, so that the problems that the hole sealing material accumulation reaction is concentrated to release heat and is difficult to release heat in the conventional grouting method are solved. Under the synergistic effect of the multiple modes, the use amount of the polyurethane hole sealing material can be effectively reduced, the total heat release amount of the polyurethane hole sealing material is reduced, and the sealing cost of the gas extraction drill hole is reduced, so that the potential safety hazard caused by high reaction temperature of the polyurethane material is avoided, and the method has wide applicability.
Drawings
FIG. 1 is a schematic illustration of the position layout of the present invention.
In the figure: 1. drilling for gas extraction; 2. conventionally sealing a hole pipe; 3. a first set of polyurethane hole sealing bags; 4. roughly sealing the hole pipe; 5. a second grouting pipe; 6. a first grouting pipe; 7. and a second group of polyurethane hole sealing bags.
Detailed Description
The present invention will be further explained below.
As shown in fig. 1, the method comprises the following specific steps:
A. collecting drill cuttings in the drilling process of the gas extraction drill hole 1, and placing the collected drill cuttings on a combined screen for screening, wherein the combined screen is divided into an upper layer and a lower layer, the aperture of the upper layer is 3mm, and the aperture of the lower layer is 1 mm; in the screening process, continuously washing the combined screen by using high-pressure water, collecting drill cuttings on the lower layer of the combined screen and carrying out air drying;
B. selecting a plurality of conventional hole sealing pipes 2 and a plurality of rough hole sealing pipes 4 to be connected to form a combined hole sealing pipe, wherein the first conventional hole sealing pipe is used as the front end of the combined hole sealing pipe, one end of the first conventional hole sealing pipe is coaxially connected with one end of the first rough hole sealing pipe, the other end of the first rough hole sealing pipe is coaxially connected with one end of the second conventional hole sealing pipe, the conventional hole sealing pipes 2 and the rough hole sealing pipes 4 are alternately connected in such a repeated way until the total length of the combined hole sealing pipe reaches the depth of hole sealing required by the gas extraction drill hole 1, and the rear end of the combined hole sealing pipe is ensured to be the last conventional hole sealing pipe;
C. binding a first group of polyurethane hole sealing bags 3 on the outer circumferential surface of a first coarse hole sealing pipe, binding a second group of polyurethane hole sealing bags 7 on the outer circumferential surface of the last coarse hole sealing pipe, and fixing a first grouting pipe 6 on the second group of polyurethane hole sealing bags 7;
D. sequentially extruding a first group of polyurethane hole sealing bags 3 and a second group of polyurethane hole sealing bags 7, after polyurethane materials in the two groups of hole sealing bags are fully mixed, sending the front ends of the combined hole sealing pipes into a gas extraction drill hole 1, enabling the first group of polyurethane hole sealing bags 3 and the second group of polyurethane hole sealing bags 7 to be located at a gas extraction drill hole sealing section, after polyurethane in the two groups of polyurethane hole sealing bags is cured, enabling the two groups of polyurethane hole sealing bags and the wall of the gas extraction drill hole to form a sealing space in a surrounding mode, enabling one end of a first grouting pipe 6 to be located in the sealing space, and enabling the other end of the first grouting pipe 6 to be located outside the gas extraction drill hole 1, and accordingly completing primary hole sealing;
E. one end of a second grouting pipe 5 penetrates through the first grouting pipe 6 and extends into the sealed space, and the extension of one end of the second grouting pipe 5 is stopped when the distance between the end of the second grouting pipe and the first group of polyurethane hole sealing bags is 0.1-0.15 m;
F. fully and uniformly mixing 35-45 parts by mass of the drilling cuttings obtained in the step A, 20-30 parts by mass of a polyurethane A component, 25-33 parts by mass of a polyurethane B component and 5-10 parts by mass of a hole sealing material consisting of phase change microcapsules with a phase change temperature of 45-55 ℃, injecting the hole sealing material formed by mixing into a sealed space through a second grouting pipe 5, pulling out the second grouting pipe 5 from a drilled hole at a constant speed in the hole sealing material injection process, ensuring that the hole sealing material is uniformly distributed in the sealed space, stopping injecting and completely separating the second grouting pipe 5 from a first grouting pipe 6 until the hole sealing material overflows from the first grouting pipe 6, and then plugging the first grouting pipe 6; and finishing the sealing process of the gas extraction drill hole 1 after the hole sealing material is subjected to foaming reaction in the sealed space.
The combined screen is the existing equipment.
Further, the diameter of the rough hole sealing pipe 4 is 1.5-2 times that of the conventional hole sealing pipe 2 and is smaller than 4/5 of the diameter of the gas extraction drill hole 1.
Further, the rough hole sealing pipe 4 is connected with the conventional hole sealing pipe 2 through internal and external threads, and the lengths of the rough hole sealing pipe 4 and the conventional hole sealing pipe 2 are equal.
Further, the capsule wall material of the phase-change microcapsule is melamine resin, and the capsule core material is formed by mixing n-tricosane and n-tetracosane.
Claims (4)
1. A method for safely sealing a gas extraction borehole by using polyurethane is characterized by comprising the following specific steps:
A. collecting drill cuttings in the drilling process of the gas extraction drill hole, and placing the collected drill cuttings on a combined screen for screening, wherein the combined screen is divided into an upper layer and a lower layer, the aperture of the upper layer is 3mm, and the aperture of the lower layer is 1 mm; in the screening process, continuously washing the combined screen by using high-pressure water, collecting drill cuttings on the lower layer of the combined screen and carrying out air drying;
B. selecting a plurality of conventional hole sealing pipes and a plurality of rough hole sealing pipes to be connected to form a combined hole sealing pipe, wherein the first conventional hole sealing pipe is used as the front end of the combined hole sealing pipe, one end of the first conventional hole sealing pipe is coaxially connected with one end of the first rough hole sealing pipe, the other end of the first rough hole sealing pipe is coaxially connected with one end of the second conventional hole sealing pipe, the conventional hole sealing pipes and the rough hole sealing pipes are alternately connected in such a repeated way until the total length of the combined hole sealing pipe reaches the hole sealing depth required by gas extraction drilling, and the rear end of the combined hole sealing pipe is ensured to be the last conventional hole sealing pipe;
C. binding a first group of polyurethane hole sealing bags on the outer circumferential surface of the first coarse hole sealing pipe, binding a second group of polyurethane hole sealing bags on the outer circumferential surface of the last coarse hole sealing pipe, and fixing a first grouting pipe on the second group of polyurethane hole sealing bags;
D. sequentially extruding a first group of polyurethane hole sealing bags and a second group of polyurethane hole sealing bags, after polyurethane materials in the two groups of hole sealing bags are fully mixed, sending the front end of the combined hole sealing pipe into a gas extraction drill hole, enabling the first group of polyurethane hole sealing bags and the second group of polyurethane hole sealing bags to be located at a gas extraction drill hole sealing section, after polyurethane in the two groups of polyurethane hole sealing bags is cured, enabling the two groups of polyurethane hole sealing bags and the wall of the gas extraction drill hole to form a sealing space in a surrounding mode, enabling one end of a first grouting pipe to be located in the sealing space, and enabling the other end of the first grouting pipe to be located outside the gas extraction drill hole, and accordingly completing primary hole sealing;
E. one end of a second grouting pipe penetrates through the first grouting pipe and extends into the sealed space, and the extension of one end of the second grouting pipe is stopped when the distance between the end of the second grouting pipe and the first group of polyurethane hole sealing bags is 0.1-0.15 m;
F. fully and uniformly mixing 35-45 parts by mass of the drill cuttings obtained in the step A, 20-30 parts by mass of a polyurethane A component, 25-33 parts by mass of a polyurethane B component and 5-10 parts by mass of a hole sealing material consisting of phase change microcapsules with a phase change temperature of 45-55 ℃, injecting the hole sealing material formed by mixing into a sealed space through a second grouting pipe, pulling out the second grouting pipe from a drill hole at a constant speed in the hole sealing material injection process, ensuring that the hole sealing material is uniformly distributed in the sealed space, stopping injecting and completely separating the second grouting pipe from the first grouting pipe until the hole sealing material overflows from the first grouting pipe, and then plugging the first grouting pipe; and finishing the sealing process of the gas extraction drill hole after the hole sealing material is subjected to foaming reaction in the sealed space.
2. The method for safely sealing the gas extraction drill hole by using the polyurethane according to claim 1, wherein the diameter of the rough hole sealing pipe is 1.5-2 times that of a conventional hole sealing pipe and is smaller than 4/5 of the diameter of the gas extraction drill hole.
3. The method for safely sealing a gas extraction borehole by using polyurethane according to claim 1, wherein the rough hole sealing pipe and the conventional hole sealing pipe are connected by internal and external threads, and the lengths of the rough hole sealing pipe and the conventional hole sealing pipe are equal.
4. The method for safely sealing the gas extraction drill hole by using polyurethane as claimed in claim 1, wherein the wall material of the phase-change microcapsule is melamine resin, and the core material of the phase-change microcapsule is a mixture of n-tricosane and n-tetracosane.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010524674.7A CN111485937B (en) | 2020-06-10 | 2020-06-10 | Method for safely sealing gas extraction drill hole by utilizing polyurethane |
| AU2021100595A AU2021100595A4 (en) | 2020-06-10 | 2021-01-30 | Method of sealing gas extraction drilled hole by using polyurethane safely |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010524674.7A CN111485937B (en) | 2020-06-10 | 2020-06-10 | Method for safely sealing gas extraction drill hole by utilizing polyurethane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111485937A true CN111485937A (en) | 2020-08-04 |
| CN111485937B CN111485937B (en) | 2021-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010524674.7A Active CN111485937B (en) | 2020-06-10 | 2020-06-10 | Method for safely sealing gas extraction drill hole by utilizing polyurethane |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111485937B (en) |
| AU (1) | AU2021100595A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852391A (en) * | 2020-08-07 | 2020-10-30 | 中煤科工集团重庆研究院有限公司 | Self-adaptive deformation gas extraction drilling and hole sealing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1262056A1 (en) * | 1985-05-08 | 1986-10-07 | Донецкий Государственный Институт Проектирования Организации Шахтного Строительства | Device for sealing blast holes |
| CN201568076U (en) * | 2009-12-20 | 2010-09-01 | 山西晋城无烟煤矿业集团有限责任公司 | Drilling hole sealing device in highly gassy mine |
| CN102704984A (en) * | 2012-04-28 | 2012-10-03 | 中国矿业大学 | Borehole high-concentration gas extraction and drainage method and device thereof |
| CN103161443A (en) * | 2013-04-10 | 2013-06-19 | 中国矿业大学 | Detection and sealing integrated method and device for gas extraction drill hole |
| CN103775120A (en) * | 2014-01-20 | 2014-05-07 | 中国矿业大学 | Method for realizing drilling and hole sealing based on drill cuttings during uplink gas extraction |
-
2020
- 2020-06-10 CN CN202010524674.7A patent/CN111485937B/en active Active
-
2021
- 2021-01-30 AU AU2021100595A patent/AU2021100595A4/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1262056A1 (en) * | 1985-05-08 | 1986-10-07 | Донецкий Государственный Институт Проектирования Организации Шахтного Строительства | Device for sealing blast holes |
| CN201568076U (en) * | 2009-12-20 | 2010-09-01 | 山西晋城无烟煤矿业集团有限责任公司 | Drilling hole sealing device in highly gassy mine |
| CN102704984A (en) * | 2012-04-28 | 2012-10-03 | 中国矿业大学 | Borehole high-concentration gas extraction and drainage method and device thereof |
| CN103161443A (en) * | 2013-04-10 | 2013-06-19 | 中国矿业大学 | Detection and sealing integrated method and device for gas extraction drill hole |
| CN103775120A (en) * | 2014-01-20 | 2014-05-07 | 中国矿业大学 | Method for realizing drilling and hole sealing based on drill cuttings during uplink gas extraction |
Non-Patent Citations (1)
| Title |
|---|
| 郝志勇: "材料复合技术及其在钻孔密封中的应用研究", 《中国博士学位论文全文数据库 工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852391A (en) * | 2020-08-07 | 2020-10-30 | 中煤科工集团重庆研究院有限公司 | Self-adaptive deformation gas extraction drilling and hole sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111485937B (en) | 2021-07-13 |
| AU2021100595A4 (en) | 2021-04-15 |
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