CN104632271A - Method for increasing permeability in drilling holes in cold expansion and heat driving mode - Google Patents
Method for increasing permeability in drilling holes in cold expansion and heat driving mode Download PDFInfo
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- CN104632271A CN104632271A CN201510015228.2A CN201510015228A CN104632271A CN 104632271 A CN104632271 A CN 104632271A CN 201510015228 A CN201510015228 A CN 201510015228A CN 104632271 A CN104632271 A CN 104632271A
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- gas extraction
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- 238000005553 drilling Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 13
- 230000035699 permeability Effects 0.000 title abstract description 5
- 238000000605 extraction Methods 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003245 coal Substances 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000009833 condensation Methods 0.000 claims description 18
- 230000005494 condensation Effects 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 12
- 238000001028 reflection method Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000007569 slipcasting Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000002045 lasting effect Effects 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 abstract description 4
- 238000003795 desorption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 44
- 238000005516 engineering process Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- 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
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- 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
-
- 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/001—Cooling arrangements
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a method for increasing the permeability in drilling holes in a cold expansion and heat driving mode and is suitable for efficient extraction of underground coal mine gas. Firstly, the extraction drilling holes are formed in a coal bed in a staggered mode and strengthened; water is injected in the strengthened extraction drilling holes through a water injection pump, the water is refrigerated to be condensed into ice, a coal body is cracked through the volume expansion of icing of the water body, and an original crack is expanded; then, heat pipes are used for heating the drilling holes, the ice is transformed into water, and the water is discharged out of the drilling holes; lastly, the heat pipes are used for continually heating the coal body in the drilling holes to form a stable temperature field, the gas adsorption potential is obviously reduced through the heat effect, gas desorption is promoted, so that the purpose of strengthening gas extraction is achieved, the range of the single-hole effective pressure relief influence can be obviously enlarged, and the coal bed gas extraction efficiency is increased by 40% or more. The method is safe, reliable, low in cost, simple, practical and capable of saving time and labor.
Description
Technical field
The present invention relates to cold expanding heat driving type coal body anti-reflection method in a kind of boring, be particularly useful for the efficient extraction of gas of underground coal mine high gassy and low permeability coal seam.
Background technology
The fundamental means that China's coal-mine fire damp is administered is the gas pumping measure based on drilling gas extraction way.Along with China's coal-mine enters deep mining, the low Dominated Factors becoming the efficient extraction of restriction gas gradually of gas permeability of coal seam.Therefore, strengthen anti-reflection becoming and improve gas pumping effect, realize the key technology of deep coal and gas power phenomenon.The anti-reflection technology of strengthening of current main employing mainly contains two kinds, and a kind of is that fluid machinery and fluid media (medium) match such as, to the method for the process that coal body carries out, hydraulic slotted liner technique, fracturing etc.; Another kind is that the modes such as explosive charge impel coal body fracturing.Two kinds of methods all can increase gas permeability of coal seam, improve gas pumping effect, but still have own limitations.When utilizing the method such as hydraulic slotted liner technique, fracturing, have water-blocking effect etc. and suppress gasresolution; When utilizing the methods such as explosive charge, then there is the bothersome effort of powder charge, and explosive inherently dangerous matter sources, downhole safety is produced and also there is certain threat.Therefore, it is very necessary for finding the anti-reflection measure of a kind of strengthening safe and reliable, time saving and energy saving, simple and with low cost, and this is to raising mine gas extraction efficiency and prevent coal and gas prominent significant.
As everyone knows, water body is when becoming solid-state from liquid state, and its volume can expand.The change of water body own physical character is utilized to form extruding of expanding, thus fracturing coal body, the methods such as relative hydraulic slotted liner technique, fracturing, explosive charge want comparatively safe many.In addition, many research shows, the gas adsorption gesture of coal body can present remarkable reduction along with the raising of temperature.With the reduction of gas adsorption gesture, be of value to coal gas and resolve.Therefore, if can be artificial to the additional thermal field of coal body, will certainly effectively promote that coal gas is resolved.Generally speaking, how water condensation expansion fracturing in boring and additional temp field are promoted that gasresolution combines, forming the integrated of technology is the problem being worth thinking.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, provides cold expanding heat driving type coal body anti-reflection method in a kind of boring safe and reliable, time saving and energy saving, simple and with low cost.
Technical scheme: cold expanding heat driving type coal body anti-reflection method in boring of the present invention, comprises layer-through drilling or concordant boring, the position, hole of interlaced arrangement extraction borehole and enhanced gas extraction boring in coal seam; Construction extraction borehole, sealing of hole link gas pumping pipe network and carry out gas pumping; Step is as follows:
A. enhanced gas extraction of constructing is holed, after exiting drilling rod, Grouting Pipe, return pipe, heat exchange of heat pipe, condensation pipe, water injection pipe, adjutage and drainage tube are sent into boring, the exposed junction of Grouting Pipe is connected with grouting pump, drainage tube exposed junction is connected with gas pumping pipe network, condensation pipe exposed junction is connected with condensing unit, water injection pipe exposed junction is connected with water injecting pump, and at heat pipe, revealed section on heater is installed;
B. open grouting pump, by Grouting Pipe to slip casting in enhanced gas extraction boring, after return pipe overfall, stop slip casting, sealing of hole is carried out to enhanced gas extraction boring;
C. start water injecting pump, in enhanced gas extraction boring, inject band setting-out by Water filling valve, when hydraulic pressure reaches setting value, close Water filling valve and water injecting pump;
D. start condensing unit, by condensation pipe, enhanced gas extraction boring is freezed, make the water in boring become solid-state by liquid state;
E. start heater, by heat exchange of heat pipe, boring is heated, and by adjutage, the liquefaction water in boring is discharged;
F. lasting to boring heating, by improving temperature that is interior and boring surrounding medium of holing, promoting the gasresolution of coal body in region, thus realizing enhanced gas extraction.
Described when beating layer-through drilling, extraction borehole and enhanced gas extraction drilling hole bottom center line distance are 6 ~ 8m; When playing concordant boring, extraction borehole and enhanced gas extraction drilling orifice end line of centres distance are 3 ~ 5m.
Described heater adopts water circulation heater or electrothermal tube heater.
Beneficial effect: the present invention utilizes distillation or the gasification refrigeration of solid-state or liquid, first water body condensation expansion fracturing coal body in boring is utilized, thus expansion borehole circumference preexisting crack net, and then utilize heat pipe continuous heating, to boring surrounding medium continuous heating, thus the thermal field formed can significantly reduce gas adsorption gesture, promote desorption of mash gas, reach the object of strengthening gas pumping.Significantly can expand the effective unload effects scope of single hole, make coal bed gas extraction efficiency improve more than 40%.The method is safe and reliable, with low cost, simple, time saving and energy saving, has practicality widely.
Accompanying drawing explanation
Fig. 1 is cold expanding heat driving type coal body anti-reflection method schematic diagram in boring of the present invention;
Fig. 2 is condenser tube structure schematic diagram.
In figure: 1-drainage tube, 2-is arranged in the micropore on pipe end tube wall.In figure: 1-heater, 2-grouting pump, 3-Grouting Pipe valve, 4-Grouting Pipe, 5-return pipe valve, 6-return pipe, 7-heat pipe, 8-condensing unit, 9-water injecting pump, 10-gas valve, 11-drainage tube, 12-drainage tube valve, 13-adjutage, 14-adjutage valve, 15-water injection pipe, 16-water injection pipe valve, 17-condensation pipe, 18-condensation pipe arrival end, the 19-condensation pipe port of export, 20-condensation pipe U-shaped portion position.
Detailed description of the invention
Be further described below in conjunction with accompanying drawing one embodiment of the present of invention:
A. the position, hole of interlaced arrangement extraction borehole and enhanced gas extraction boring in coal seam, ensures that extraction borehole is in the influence basin that enhanced gas extraction is holed;
B. construct extraction borehole, sealing of hole, links gas pumping pipeline and carries out gas pumping;
C. enhanced gas extraction of constructing is holed, after exiting drilling rod, Grouting Pipe 4, return pipe 6, heat pipe 7, drainage tube 11, adjutage 13, water injection pipe 15 and condensation pipe 17 are sent into boring, the exposed junction of Grouting Pipe 4 is connected with grouting pump 2, condensation pipe 17 arrival end is connected with condensing unit 8, water injection pipe 15 exposed junction is connected with water injecting pump 9, and installs heater 1 on the revealed section of heat pipe 7;
D. open grouting pump 2, by Grouting Pipe 4 to slip casting in enhanced gas extraction boring, after return pipe 6 overfall, stop slip casting, sealing of hole is carried out to enhanced gas extraction boring;
E. after sealing of hole completes, close return pipe valve 5, Grouting Pipe valve 3, drainage tube valve 12 and adjutage valve, start water injecting pump 9, in enhanced gas extraction boring, inject band setting-out by water injection pipe valve 16, when hydraulic pressure reaches setting value, close water injection pipe valve 16 and water injecting pump 9;
F. open condensing unit 8, condensed material, by gas valve 10, enters from the arrival end 18 of condensation pipe 17, flows out from the port of export 19, and condensed material does not directly contact coal body or methane gas in boring; Condensed material distils or gasifies in condensation pipe 17, thus to surrounding environment heat absorption, thus freezes to enhanced gas extraction boring, make the water in boring become solid-state by liquid state, utilize the cold expanding fracturing coal body of water;
G. after 20 ~ 30 minutes condensation expansion fracturing coal bodies, close condensing unit 8, gas valve 10, start adjutage valve 14, start heater 1, by heat pipe 7, boring is heated, and by adjutage 13, the liquefaction water in boring is discharged;
H. after adjutage 13 no longer water outlet, close adjutage valve 14, unlatching drainage tube valve 12, heater 1 continuous firing, heat pipe continuation, to boring heating, by improving temperature that is interior and boring surrounding medium of holing, promotes the gasresolution of coal body in region.
Described when beating layer-through drilling, extraction borehole and enhanced gas extraction drilling hole bottom center line distance are 6 ~ 8m; When playing concordant boring, extraction borehole and enhanced gas extraction drilling orifice end line of centres distance are 3 ~ 5m.
Described heater adopts water circulation heater or electrothermal tube heater.
Described condensation pipe is U-tube road, and its arrival end is connected with condensing unit, and the port of export is outside boring, and U-shaped portion position in the borehole.The mechanism of action of described condensing unit is the distillation or the gasification refrigeration that utilize solid-state or liquid, as liquid nitrogen steel cylinder etc.
Claims (3)
1. a cold expanding heat driving type coal body anti-reflection method in boring, comprises layer-through drilling or concordant boring, the position, hole of interlaced arrangement extraction borehole and enhanced gas extraction boring in coal seam; Construction extraction borehole, sealing of hole link gas pumping pipe network and carry out gas pumping; It is characterized in that step is as follows:
A. enhanced gas extraction of constructing is holed, after exiting drilling rod, Grouting Pipe, return pipe, heat exchange of heat pipe, condensation pipe, water injection pipe, adjutage and drainage tube are sent into boring, the exposed junction of Grouting Pipe is connected with grouting pump, drainage tube exposed junction is connected with gas pumping pipe network, condensation pipe exposed junction is connected with condensing unit, water injection pipe exposed junction is connected with water injecting pump, and on the revealed section of heat exchange of heat pipe, heater is installed;
B. open grouting pump, by Grouting Pipe to slip casting in enhanced gas extraction boring, after return pipe overfall, stop slip casting, sealing of hole is carried out to enhanced gas extraction boring;
C. start water injecting pump, in enhanced gas extraction boring, inject band setting-out by Water filling valve, when hydraulic pressure reaches setting value, close Water filling valve and water injecting pump;
D. start condensing unit, by condensation pipe, enhanced gas extraction boring is freezed, make the water in boring become solid-state by liquid state;
E. start heater, by heat exchange of heat pipe, boring is heated, and by adjutage, the liquefaction water in boring is discharged;
F. lasting to boring heating, by improving temperature that is interior and boring surrounding medium of holing, promoting the gasresolution of coal body in region, thus realizing enhanced gas extraction.
2. cold expanding heat driving type coal body anti-reflection method in one boring according to claim 1, it is characterized in that: when beating layer-through drilling, extraction borehole and enhanced gas extraction drilling hole bottom center line distance are 6 ~ 8m; When playing concordant boring, extraction borehole and enhanced gas extraction drilling orifice end line of centres distance are 3 ~ 5m.
3. cold expanding heat driving type coal body anti-reflection method in one boring according to claim 1, is characterized in that: described heater adopts water circulation heater or electrothermal tube heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015228.2A CN104632271A (en) | 2015-01-12 | 2015-01-12 | Method for increasing permeability in drilling holes in cold expansion and heat driving mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015228.2A CN104632271A (en) | 2015-01-12 | 2015-01-12 | Method for increasing permeability in drilling holes in cold expansion and heat driving mode |
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| CN104632271A true CN104632271A (en) | 2015-05-20 |
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| CN201510015228.2A Pending CN104632271A (en) | 2015-01-12 | 2015-01-12 | Method for increasing permeability in drilling holes in cold expansion and heat driving mode |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963660A (en) * | 2015-07-17 | 2015-10-07 | 煤炭科学技术研究院有限公司 | Liquid nitrogen freeze-thawing cracking coal-bed permeability-increasing coal-bed gas mining method |
| CN105201546A (en) * | 2015-09-21 | 2015-12-30 | 河南理工大学 | Device and method for improving gas extraction concentration |
| WO2017020516A1 (en) * | 2015-08-03 | 2017-02-09 | 中国矿业大学 | Gas extraction method based on liquid nitrogen cyclic freeze-thaw anti-reflection by drill holes in horizontal orientation |
| CN106401533A (en) * | 2016-11-25 | 2017-02-15 | 河南理工大学 | Device for quickly eliminating outburst by injecting liquid nitrogen to freeze coal through bedding drill holes twice |
| CN106593512A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Combined supporting and cooling device for high-temperature mine roadway |
| CN106593511A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Cooling system and method for high-temperature mine roadway support |
| CN106988719A (en) * | 2017-05-09 | 2017-07-28 | 河南理工大学 | The anti-reflection system and anti-reflection method of injection hot water and liquid nitrogen are circulated to coal seam |
| CN108194138A (en) * | 2017-12-28 | 2018-06-22 | 西安科技大学 | A kind of structure and method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation |
| CN109356640A (en) * | 2018-10-25 | 2019-02-19 | 四川大学 | A kind of broken coal permeability-increasing gas enhanced gas extraction system of the cold alternating of heat |
| CN109556474A (en) * | 2018-12-10 | 2019-04-02 | 中北大学 | A method of cooled down using material and expands fracturing |
| CN109631706A (en) * | 2018-12-10 | 2019-04-16 | 中北大学 | A kind of cooled down using material expands the device of fracturing |
| CN110985110A (en) * | 2019-12-18 | 2020-04-10 | 中南大学 | High-gas tight coal seam pumping and injecting integrated system and method |
| CN112412421A (en) * | 2020-11-05 | 2021-02-26 | 河南理工大学 | Method for strengthening pumping promotion by heat injection of cross-layer drilling and hydraulic punching |
| CN112412415A (en) * | 2020-11-05 | 2021-02-26 | 河南理工大学 | Hydraulic punching, freezing fracturing and heat injection stimulation synergistic permeability-increasing pumping-promoting method |
| CN116591640A (en) * | 2023-04-11 | 2023-08-15 | 中国矿业大学(北京) | Low-permeability coal seam high-pressure gas-water mixed pressure permeability-increasing displacement gas method and system |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017020516A1 (en) * | 2015-08-03 | 2017-02-09 | 中国矿业大学 | Gas extraction method based on liquid nitrogen cyclic freeze-thaw anti-reflection by drill holes in horizontal orientation |
| US10577891B2 (en) | 2015-08-03 | 2020-03-03 | Science Academy Of China University Of Mining And Technology | Using horizontal directional drilling and liquid nitrogen cyclic freeze-thaw process to improve permeability in gas drainage |
| CN105201546A (en) * | 2015-09-21 | 2015-12-30 | 河南理工大学 | Device and method for improving gas extraction concentration |
| CN106401533A (en) * | 2016-11-25 | 2017-02-15 | 河南理工大学 | Device for quickly eliminating outburst by injecting liquid nitrogen to freeze coal through bedding drill holes twice |
| CN106401533B (en) * | 2016-11-25 | 2019-05-10 | 河南理工大学 | Secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination apparatus and method |
| CN106593511B (en) * | 2017-01-10 | 2019-02-15 | 中国矿业大学 | A kind of thermal post_buckling roadway support cooling system and method |
| CN106593511A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Cooling system and method for high-temperature mine roadway support |
| CN106593512B (en) * | 2017-01-10 | 2019-02-15 | 中国矿业大学 | A kind of high-temperature mine tunnel combined supporting and cooling device |
| CN106593512A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Combined supporting and cooling device for high-temperature mine roadway |
| CN106988719A (en) * | 2017-05-09 | 2017-07-28 | 河南理工大学 | The anti-reflection system and anti-reflection method of injection hot water and liquid nitrogen are circulated to coal seam |
| CN108194138A (en) * | 2017-12-28 | 2018-06-22 | 西安科技大学 | A kind of structure and method that the high-ground stress release of presplitting realization deep ground is oriented to based on phase transformation |
| CN108194138B (en) * | 2017-12-28 | 2019-08-16 | 西安科技大学 | A kind of structure and method for realizing the high-ground stress release of deep ground based on phase transformation guiding presplitting |
| CN109356640A (en) * | 2018-10-25 | 2019-02-19 | 四川大学 | A kind of broken coal permeability-increasing gas enhanced gas extraction system of the cold alternating of heat |
| CN109631706A (en) * | 2018-12-10 | 2019-04-16 | 中北大学 | A kind of cooled down using material expands the device of fracturing |
| CN109556474A (en) * | 2018-12-10 | 2019-04-02 | 中北大学 | A method of cooled down using material and expands fracturing |
| CN110985110A (en) * | 2019-12-18 | 2020-04-10 | 中南大学 | High-gas tight coal seam pumping and injecting integrated system and method |
| CN110985110B (en) * | 2019-12-18 | 2021-06-25 | 中南大学 | High-gas tight coal seam pumping and injecting integrated system and method |
| CN112412421A (en) * | 2020-11-05 | 2021-02-26 | 河南理工大学 | Method for strengthening pumping promotion by heat injection of cross-layer drilling and hydraulic punching |
| CN112412415A (en) * | 2020-11-05 | 2021-02-26 | 河南理工大学 | Hydraulic punching, freezing fracturing and heat injection stimulation synergistic permeability-increasing pumping-promoting method |
| CN116591640A (en) * | 2023-04-11 | 2023-08-15 | 中国矿业大学(北京) | Low-permeability coal seam high-pressure gas-water mixed pressure permeability-increasing displacement gas method and system |
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Inventor after: Lin Baiquan Inventor after: Hong Yidu Inventor after: Guo Chang Inventor after: Zhu Chuanjie Inventor after: Lu Ximiao Inventor after: Gao Zishan Inventor after: Yang Kai Inventor after: Kong Jia Inventor after: Zhang Xiangliang Inventor before: Lin Baiquan Inventor before: Hong Yidu Inventor before: Zhu Chuanjie Inventor before: Yao Hao |
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Application publication date: 20150520 |