CN109209328A - A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus - Google Patents
A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus Download PDFInfo
- Publication number
- CN109209328A CN109209328A CN201811190914.3A CN201811190914A CN109209328A CN 109209328 A CN109209328 A CN 109209328A CN 201811190914 A CN201811190914 A CN 201811190914A CN 109209328 A CN109209328 A CN 109209328A
- Authority
- CN
- China
- Prior art keywords
- high voltage
- water
- capsule
- fried
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 235000008331 Pinus X rigitaeda Nutrition 0.000 title claims abstract description 27
- 235000011613 Pinus brutia Nutrition 0.000 title claims abstract description 27
- 241000018646 Pinus brutia Species 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000002775 capsule Substances 0.000 claims abstract description 53
- 238000005553 drilling Methods 0.000 claims abstract description 35
- 238000004146 energy storage Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 239000003245 coal Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- 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
- E21B43/006—Production of coal-bed methane
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A method of it is quick-fried that deep hole pine being carried out using electric pulse hydraulic fracture integrated apparatus, comprising: to the multiple drillings of coal body construction；The front end of electric pulse hydraulic fracture integrated apparatus is extend into the depths of drilling, the charging end of high voltage energy-storage capacitor is connected with high voltage charging power supply later, capsule water injection pipe and pouring water into borehole pipe are connected with water source respectively；It opens the first valve to fill the water into capsule hole, expands capsule hole；The second valve is opened, static pressure water is injected into drilling by pouring water into borehole pipe；High voltage charging power supply is opened to charging in high voltage energy-storage capacitor, high voltage charging power supply is disconnected when voltage reaches predetermined value, the discharge switch of closed high energy-storage capacitor discharges the electric energy stored in high voltage energy-storage capacitor by discharge electrode in water.The quick-fried method of deep hole pine of the invention realizes place discharge electrode, water filling, sealing of hole and the integrated of pumping spool in the quick-fried operation of pine using electric pulse hydraulic fracture integrated apparatus and operates, and operating efficiency is high.
Description
Technical field
The present invention relates to the application methods of mining equipment, and in particular to a kind of to use electric pulse hydraulic fracture integrated apparatus
Carry out the quick-fried method of deep hole pine.
Background technique
In coal working face exploitation process, to prevent prominent generation, coal body permeability must be increased as far as possible, keep gas sufficiently pre-
Row.When coal mining constantly extends to ground end, the high-ground stress of deep appearance, high methane content, high methane adsorptive pressure, coal
The problem of high heterogeneity and low-permeability of rock, is increasingly severe.Comprehensive mechanization working face quickly propels, stope stress
Have little time to balance.These all lead to the release drainage curtailment of coal working face jointly, in coal production, usually to increase explosive
Dosage improves the quick-fried effect of pine, and there are larger security risks for this mode.Patent CN201610713505 discloses a kind of novel
Deep hole water pressure blasting demolition set and blasting method, dynamite container is wrapped in water bag, then water bag is packed into and is drilled, real after water bag water filling
Apply explosion.This blasting method has not seeped into rock crack, therefore its explosion is only capable of pine since water exists only in water bag
Limited rock stratum around dynamic drilling, and the entire rock stratum around drilling cannot be loosened.
Summary of the invention
The quick-fried side of deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus the purpose of the present invention is to provide a kind of
Method integrates water filling, electric discharge, to improve the quick-fried efficiency of pine of underground deep hole.
For achieving the above object, technical scheme is as follows:
A method of loose quick-fried, the used electric pulse waterpower of deep hole is carried out using electric pulse hydraulic fracture integrated apparatus
Fracturing integrated apparatus includes discharge electrode, high voltage cable, spool, high voltage energy-storage capacitor, capsule hole, pouring water into borehole pipe
With capsule water injection pipe, discharge electrode is fixed on the front end of spool, and one end of high voltage cable is connected with discharge electrode, high voltage cable
The other end is connected after passing through spool with high voltage energy-storage capacitor, and capsule hole string on spool, stretch by the front end of capsule water injection pipe
Enter into capsule hole, the front end of pouring water into borehole pipe passes through capsule hole, is equipped with the first valve on capsule water injection pipe, bores
Second valve is installed on the water injection pipe of hole；Carry out the deep hole quick-fried method of pine comprising steps of
S1: it when the back production of coal seam, constructs 2 or more and drills to coal body；
The front end of electric pulse hydraulic fracture integrated apparatus: being extend into the depths of drilling by S2, later by high-voltage energy storage electricity
The charging end of container is connected with high voltage charging power supply, and capsule water injection pipe and pouring water into borehole pipe are connected with water source respectively；
S3: it opens the first valve and is filled the water into capsule hole, expand capsule hole；The second valve is opened, is passed through
Pouring water into borehole pipe injects static pressure water into drilling, until the second valve is closed after can not reinjecting；
S4: high voltage charging power supply is opened to charging in high voltage energy-storage capacitor, high pressure is disconnected when voltage reaches predetermined value
The electric energy stored in high voltage energy-storage capacitor is passed through discharge electrode by the discharge switch of charge power supply, closed high energy-storage capacitor
It discharges in water.
Technical solution as a further improvement of that present invention, the step S4 further include later step S5: being again turned on institute
It states high voltage charging power supply to charge to the high voltage energy-storage capacitor, when voltage reaches predetermined value again, is closed institute again
It states discharge switch to discharge, stops electric discharge after reignition 50~100 times.
Technical solution as a further improvement of that present invention, the step S5 further include later step S6: opening the second valve
Door reduces the hydraulic pressure in drilling, and opening the first valve makes capsule hole relaxation, fixes capsule hole, at the same by spool to
Drilling is outer to exit 1~2m.
Technical solution as a further improvement of that present invention, the step S6 further include later step S7: repeating step S3
~S6 stops the quick-fried operation of pine when the distance between discharge electrode and capsule hole are 2m.
Technical solution as a further improvement of that present invention, the step S7 further include later step S8: opening the second valve
Door reduces the hydraulic pressure in drilling, and opening the first valve makes capsule hole relaxation, withdraws from the cause of electric pulse waterpower from drilling later
Split integrated apparatus.
Technical solution as a further improvement of that present invention, the step S8 further include later step S9: choosing new brill
Hole repeats step S2~S8, until the quick-fried operation of pine is all completed in all drillings.
Compared with prior art, the beneficial effect comprise that
1. a kind of method quick-fried using electric pulse hydraulic fracture integrated apparatus progress deep hole pine of the invention, utilizes structure
Cleverly electric pulse hydraulic fracture integrated apparatus realizes the one for placing discharge electrode, water filling and sealing of hole in the quick-fried operation of pine
Change operation, operating efficiency is high；
2. static pressure water is full of in the drilling and crack of drilling surrounding, the electricity that discharge electrode generates using static pressure water as medium
Pulse causes the cavitation effect of water constantly to expand crack；
3. discharge electrode multiple discharge makes crack and secondary interstice of the water full of drilling surrounding, improves coal body mechanical property
Can, the plasticity of coal body is improved, outburst hazard is reduced.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of electric pulse hydraulic fracture integrated apparatus；
Fig. 2 is the structural schematic diagram of capsule hole；
Fig. 3 is cross-sectional view at the A of capsule sealer；
Fig. 4 is cross-sectional view at the B of capsule sealer；
In figure 1 above -4,1- discharge electrode；2- spool；3- capsule hole；301- capsule water injection pipe；The first valve of 302-
Door；4- high voltage cable；5- pouring water into borehole pipe；The second valve of 501-.
Specific embodiment:
The present invention is described further with reference to the accompanying drawings.
Embodiment
As shown in Figure 1, a kind of electric pulse hydraulic fracture integrated apparatus, including discharge electrode 1, high voltage cable 4, spool 2,
High voltage energy-storage capacitor, capsule hole 3, pouring water into borehole pipe 5 and capsule water injection pipe 301.Discharge electrode 1 is fixed on spool 2
One end of front end, high voltage cable 4 is connected with discharge electrode 1, and the other end of high voltage cable 4 is electric with high-voltage energy storage after spool 2
Container is connected, and the capacitor of high voltage energy-storage capacitor is 20~40 μ F, and capsule hole 3 is gone here and there on spool 2.
As shown in Fig. 2,3 and 4, the front end of capsule water injection pipe 301 is extend into capsule hole 3, before pouring water into borehole pipe 5
End is across capsule hole 3.First valve 302 is mounted on capsule water injection pipe 301, and the second valve 501 is mounted on pouring water into borehole
On pipe 5.
It is as follows that the quick-fried method of deep hole pine is carried out using above-mentioned electric pulse hydraulic fracture integrated apparatus:
1) when coal seam back production, to the multiple drillings of coal body construction；
2) front end of electric pulse hydraulic fracture integrated apparatus is extend into the depths of drilling, later by high-voltage energy storage capacitor
The charging end of device is connected with the high voltage charging power supply that rated output voltage is 100~500kV, by capsule water injection pipe 301 and drilling
Water injection pipe 5 is connected with water source respectively；
3) it opens the first valve 302 to fill the water into capsule hole 3, capsule hole 3 expands, 3 inside of capsule hole
Capsule skin hold tightly spool 2, the capsule skin in outside is adjacent to the wall of a borehole, to close drilling；
4) the second valve 501 is opened, static pressure water is injected into drilling by pouring water into borehole pipe 5, until after can not reinjecting
Close the second valve 501；
5) high voltage charging power supply is opened to charging in high voltage energy-storage capacitor, and high pressure is disconnected when voltage reaches predetermined value and is filled
The electric energy stored in high voltage energy-storage capacitor is passed through discharge electrode 1 by the discharge switch of power supply, closed high energy-storage capacitor
It discharges in water, the electric discharge moment of discharge electrode 1 generates powerful shock wave in water, and the water around discharge electrode is made to generate cavitation
Coal body around effect percussive drilling expands the crack on coal body；
6) high voltage charging power supply is again turned on to charge into high voltage energy-storage capacitor, when voltage reaches predetermined value again,
Closure discharge switch discharges again, continues to expand the crack on coal body, stops electric discharge after reignition 50~100 times；
7) opening the second valve 501 reduces the hydraulic pressure in drilling, and opening the first valve 302 makes the relaxation of capsule hole 3, leads to
It crosses shaft and withstands capsule hole 3, while spool 2 is exited into 1~2m to outside drilling；
8) step 3)~7 are repeated)；
9) when the distance between discharge electrode 1 and capsule hole 3 are 2m, the quick-fried operation of pine is completed；
10) opening the second valve 501 reduces the hydraulic pressure in drilling, and opening the first valve 302 makes the relaxation of capsule hole 3,
Electric pulse hydraulic fracture integrated apparatus is withdrawn from from drilling later；
11) new drilling is chosen, step 2)~9 are repeated), until all having carried out the quick-fried operation of pine in all drillings.
Claims (6)
1. a kind of carry out the quick-fried method of deep hole pine using electric pulse hydraulic fracture integrated apparatus, which is characterized in that
The electric pulse hydraulic fracture integrated apparatus includes discharge electrode, high voltage cable, spool, high voltage energy-storage capacitor, glue
Capsule hole packer, pouring water into borehole pipe and capsule water injection pipe, discharge electrode are fixed on the front end of spool, one end of high voltage cable and electric discharge
Electrode is connected, and the other end of high voltage cable is connected after passing through spool with high voltage energy-storage capacitor, capsule hole string on spool,
The front end of capsule water injection pipe is extend into capsule hole, and the front end of pouring water into borehole pipe passes through capsule hole, capsule water injection pipe
On the first valve is installed, the second valve is installed on pouring water into borehole pipe；
The quick-fried method of deep hole pine comprising steps of
S1: it when the back production of coal seam, constructs 2 or more and drills to coal body；
S2: the front end of electric pulse hydraulic fracture integrated apparatus is extend into the depths of drilling, later by high voltage energy-storage capacitor
Charging end be connected with high voltage charging power supply, capsule water injection pipe and pouring water into borehole pipe are connected with water source respectively；
S3: it opens the first valve and is filled the water into capsule hole, expand capsule hole；The second valve is opened, drilling is passed through
Water injection pipe injects static pressure water into drilling, until the second valve is closed after can not reinjecting；
S4: high voltage charging power supply is opened to charging in high voltage energy-storage capacitor, high-voltage charging is disconnected when voltage reaches predetermined value
Power supply, the discharge switch of closed high energy-storage capacitor is by the electric energy stored in high voltage energy-storage capacitor by discharge electrode in water
Middle release.
2. a kind of method quick-fried using electric pulse hydraulic fracture integrated apparatus progress deep hole pine according to claim 1,
It is characterized in that, further including step S5 after the step S4: being again turned on the high voltage charging power supply to the high-voltage energy storage
Capacitor charges, and when voltage reaches predetermined value again, is closed the discharge switch again and discharges, reignition 50
Stop electric discharge after~100 times.
3. a kind of method quick-fried using electric pulse hydraulic fracture integrated apparatus progress deep hole pine according to claim 2,
It is characterized in that, further including step S6 after the step S5: opening the second valve reduces the hydraulic pressure in drilling, and opens the first valve
Door makes capsule hole relaxation, fixes capsule hole, while spool is exited 1~2m to outside drilling.
4. a kind of method quick-fried using electric pulse hydraulic fracture integrated apparatus progress deep hole pine according to claim 3,
It is characterized in that, further including step S7 after the step S6: repeat step S3~S6, when discharge electrode and capsule hole it
Between distance when being 2m, stop the quick-fried operation of pine.
5. a kind of method quick-fried using electric pulse hydraulic fracture integrated apparatus progress deep hole pine according to claim 4,
It is characterized in that, further including step S8 after the step S7: opening the second valve reduces the hydraulic pressure in drilling, and opens the first valve
Door makes capsule hole relaxation, withdraws from electric pulse hydraulic fracture integrated apparatus from drilling later.
6. a kind of method quick-fried using electric pulse hydraulic fracture integrated apparatus progress deep hole pine according to claim 5,
It is characterized in that, further including step S9 after the step S8: choosing new drilling, repeat step S2~S8, until all brills
All complete the quick-fried operation of pine in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190914.3A CN109209328A (en) | 2018-10-12 | 2018-10-12 | A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190914.3A CN109209328A (en) | 2018-10-12 | 2018-10-12 | A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209328A true CN109209328A (en) | 2019-01-15 |
Family
ID=64979754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811190914.3A Pending CN109209328A (en) | 2018-10-12 | 2018-10-12 | A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209328A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457802A (en) * | 2020-04-14 | 2020-07-28 | 西安闪光能源科技有限公司 | Method for breaking rock stratum of strip mine |
| CN111457801A (en) * | 2020-04-14 | 2020-07-28 | 西安闪光能源科技有限公司 | Secondary breaking method for stone blocks |
| CN115371508A (en) * | 2022-09-01 | 2022-11-22 | 重庆大学 | Electric blasting device, novel coal rock fracturing system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140008072A1 (en) * | 2011-03-14 | 2014-01-09 | Total S.A. | Electrical fracturing of a reservoir |
| CN104453827A (en) * | 2014-11-06 | 2015-03-25 | 中国矿业大学 | Method for improving air permeability of coal bed in high-energy electric detonation mode |
| CN104863628A (en) * | 2015-04-15 | 2015-08-26 | 中国矿业大学 | Method for fracturing and permeability improvement to shield coal road excavation by utilizing pulse detonation waves |
| CN105275443A (en) * | 2015-11-06 | 2016-01-27 | 中国矿业大学 | Coal mine underground high-power electric knock assisted hydraulic fracturing permeability enhancement method |
| CN108592723A (en) * | 2018-05-04 | 2018-09-28 | 中国矿业大学 | A kind of underground blasting water filling integration hole packer |
-
2018
- 2018-10-12 CN CN201811190914.3A patent/CN109209328A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140008072A1 (en) * | 2011-03-14 | 2014-01-09 | Total S.A. | Electrical fracturing of a reservoir |
| CN104453827A (en) * | 2014-11-06 | 2015-03-25 | 中国矿业大学 | Method for improving air permeability of coal bed in high-energy electric detonation mode |
| CN104863628A (en) * | 2015-04-15 | 2015-08-26 | 中国矿业大学 | Method for fracturing and permeability improvement to shield coal road excavation by utilizing pulse detonation waves |
| CN105275443A (en) * | 2015-11-06 | 2016-01-27 | 中国矿业大学 | Coal mine underground high-power electric knock assisted hydraulic fracturing permeability enhancement method |
| CN108592723A (en) * | 2018-05-04 | 2018-09-28 | 中国矿业大学 | A kind of underground blasting water filling integration hole packer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457802A (en) * | 2020-04-14 | 2020-07-28 | 西安闪光能源科技有限公司 | Method for breaking rock stratum of strip mine |
| CN111457801A (en) * | 2020-04-14 | 2020-07-28 | 西安闪光能源科技有限公司 | Secondary breaking method for stone blocks |
| CN115371508A (en) * | 2022-09-01 | 2022-11-22 | 重庆大学 | Electric blasting device, novel coal rock fracturing system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109138956A (en) | A kind of electric pulse hydraulic fracture integrated apparatus | |
| WO2022252591A1 (en) | Cracking permeability increasing method combining hydraulic fracturing and methane in-situ combustion explosion | |
| CN101644156B (en) | Method for weakening coal-rock mass by hydraulic blasting and fracturing | |
| CN108775233B (en) | Deep hole is not hard up blasting water injection integration hole sealing device in pit | |
| AU2015391205B2 (en) | Downhole coal seam pulse detonation wave directional fracturing permeability-increasing method | |
| CN104500019B (en) | Reinforced anti-reflection method for promoting gas extraction | |
| CN105275443B (en) | A kind of underground coal mine high power electric detonation shake auxiliary hydraulic fracturing anti-reflection method | |
| CN101813002B (en) | Coal seam pre-splitting method based on gas extraction | |
| RU2704997C1 (en) | Method and device for control of coal bed upper part collapse area due to application of technology of pulsed hydraulic fracturing of a formation | |
| CN108397182A (en) | Electric pulse cooperates with the device and method in the anti-reflection coal seam of frozen-thawed | |
| CN104863628B (en) | One kind utilizes the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing | |
| CN109209328A (en) | A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus | |
| CN109252846B (en) | The high pressure air pulse ripples periodically hammering anti-reflection system and method for coal body | |
| CN111396049B (en) | Safe and environment-friendly rock blasting device and method | |
| CN108361061A (en) | Hypotonic coal seam electric detonation shake and microwave radiation technology frozen-thawed permeability improvement device and method | |
| CN102997766B (en) | Deep-hole pressure-relief blasting method | |
| AU2019201471B2 (en) | High-pressure self-locking packer and setting method thereof | |
| CN104819670A (en) | Pre-drilling mesopore shaft excavation blasting method | |
| CN109252861A (en) | A kind of electric pulse auxiliary liquid nitrogen freezing formula coal uncovering method | |
| CN102031775A (en) | Construction technology of drilled pile in hard oblique rocks by medium hole blasting | |
| CN111608631A (en) | Supercritical CO excitation based on electric pulse2Device for fracturing coal seam and application method | |
| CN112943210A (en) | Electric pulse and ultrasonic wave cooperated coalbed methane enhanced mining method | |
| CN108798669B (en) | Deep hole loosening hydraulic pressure relief integrated blasting method and device | |
| CN106382108A (en) | Fracturing and blockage-removal production increase method for oil-gas well based on CO2 gas phase fracturing technique | |
| CN103939075B (en) | A kind of fracturing process improving coal mine gas drainage effect and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190115 |