CN110284866A - A kind of shale fracturing device and method - Google Patents
A kind of shale fracturing device and method Download PDFInfo
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- CN110284866A CN110284866A CN201910663825.4A CN201910663825A CN110284866A CN 110284866 A CN110284866 A CN 110284866A CN 201910663825 A CN201910663825 A CN 201910663825A CN 110284866 A CN110284866 A CN 110284866A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004880 explosion Methods 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 210000004712 air sac Anatomy 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 198
- 238000003860 storage Methods 0.000 claims description 31
- 239000002360 explosive Substances 0.000 claims description 28
- 238000010304 firing Methods 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000005553 drilling Methods 0.000 claims description 21
- 238000005474 detonation Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 11
- 239000003063 flame retardant Substances 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 241001074085 Scophthalmus aquosus Species 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000000126 substance Substances 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
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a kind of shale fracturing device and methods, described device includes round drill bit disk, connection is followed by flex-stem behind round drill bit disk, flex-stem is connected to ground station, it is fluted around circle drill bit disk radial sidewalls setting, it is provided with the inflatable antiriot air chamber heaved for sealing in groove, is provided in round drill bit disk front end face middle section and ignites gas vent, ignites ignition tip and ignite gas detection probe；The present invention realizes the pressure break of shale compared with the mode of traditional artificial pressure break in this way, can significantly improve the fracturing effect of shale, realizes the target for effectively improving shale adsorbed gas burst size.It by using round drill bit and anti-explosion air-sac, can neatly change the range of blast area, realize with brill with quick-fried；And it can be recycled, it is easy to operate, it is at low cost.
Description
Technical field
The present invention relates to a kind of shale fracturing device and methods, are the pressure breaks that shale is realized by way of explosion, in turn
Increase a kind of device and method of shale gas release.
Background technique
For current environmental pollution get worse and the sharp increase problem of energy demand, the whole world are badly in need of clean energy resource and are replaced
For traditional petroleum resources and coal resources.Shale gas is the natural gas resource contained in rammell for exploitation, mainly at
It is divided into methane, and the reserves in the whole world are more considerable.Therefore, the development and utilization of shale gas be current extremely important project it
One.
The mining resources amount of China's shale gas ranks first in the world, although current exploration and recovery percent is lower, tool
There is a huge development potentiality, therefore is that gas industryization is explored under the conditions of existing economic technology to the development and utilization of shale gas
Important goal.But since the natural interconnected pore rate of shale is low, gas-flow resistance is than greatly, causing the release rate of shale gas low.Cause
This, in order to improve the release rate of shale gas, shale gas well requires the crack for increasing peripheral rock by manual method and splits
Seam rate.
Artificial fracturing majority is using two methods of hydraulic fracturing and water-saving pressure break at present, and hydraulic fracturing is with a kind of incorporation
The water of a large amount of chemical substances pours into rammell and carries out hydraulic cracking to discharge the method for natural gas, but this fracturing process is not only
Waste a large amount of water resource, it is also possible to which causing gas well nearby to occur, underground water is soft, destroys local ecological environment, faces biggish
Environmentally friendly risk.In order to reduce the consumption of water resource in fracturing process, research and propose water-saving fracturing process, mainly pass through to
A kind of method of gas liquid mixture (CO2 foam or N2 foam) the realization rock mass cracking of injection high pressure in drilling, but this side
Method performance is not easy to grasp, and constructs with very big difficulty.In addition to this, both methods is all by increasing shale page
Natural through crack realizes the volume increase of shale gas, but actually only increasing its specific surface area by broken shale could be from
Fundamentally improve the yield of shale gas.
In addition, the method for also thering is research to use explosive charge and heating exploitation, but the operation of explosive charge fracturing process is multiple
Miscellaneous, explosion needs to be refilled by explosive again, and there are biggish security risks when loading medicine, and the life of operating personnel is threatened to pacify
Entirely.Such as application number: CN102168543A " a method of shale gas recovery ratio is increased by explosive manner " and application number:
" a kind of method of blastingfracture extraction shale gas and swash split bullet " of CN105804716A, their ways are in advance to be put into explosive
In loading priming device, explosion time needs, which change, again fills out explosive, not can be recycled, while explosive changes when filling out and there is very big be stranded
It is difficult.In addition heating exploitation is a kind of recovery method emerging in recent years, but this method recovery ratio is not high, and be will use a large amount of
Heating power resource, early investment cost is big.Such as application number: " the heating exploitation method of coal bed gas " of CN1508387, main body are thought
Think it is that the microwave generator used heats water, to heat the heat pressure break mined bed of water generation.But this method will lead to
Heat is largely lost, and causes the waste of resource.
Summary of the invention
It is an object of the invention to propose a kind of shale fracturing device and method, an explosion space is formed by drilling,
It is ignited using the channel being arranged on drilling rod to explosion space conveying gaseous mixture, then moves back bar again and realize continuous explosion, Ke Yiling
Change the range of blast area livingly, realizes with brill with quick-fried；And it can be recycled, it is easy to operate, it is at low cost.
To achieve the goals above, the technical scheme is that
A kind of shale fracturing device, including round drill bit disk are provided with knife rest, knife in the front end face of round drill bit disk
Round drill bit disk radial sidewalls are stretched out in frame radial outside end, and distribution is provided with roller cutter bit on knife rest, tunnel in circle
Connection is followed by flex-stem behind drill bit disk, and flex-stem is connected to ground station, and flex-stem drives round driving to bore
Cephalic disc rotation, wherein it is fluted around circle drill bit disk radial sidewalls setting, filling for sealing is provided in groove
The antiriot air chamber that tympanites rises is provided in round drill bit disk front end face middle section and ignites gas vent, ignites ignition tip
And ignite gas detection probe, in round drill bit back-end disk face middle section be respectively arranged with ignite gas vent,
It ignites ignition tip, ignite the corresponding interface that gas detection probe and antiriot air chamber are connected, be provided with and draw in flex-stem
Quick-fried gas injection line ignites firing cable, ignites gas detection cable and indifferent gas gas ducting, passes through the corresponding interface, institute
State ignite gas injection line with ignite gas vent connect, ignite firing cable with ignition ignition tip connect, ignite gas examine
Survey cable is connect with ignition gas detection probe, indifferent gas gas ducting is connect with antiriot air chamber, is provided in ground station lazy
Property gas storage tank, ignite gas storage tank and explosive controller, indifferent gas gas ducting connect indifferent gas with aspiration pump by air delivery pump and stores up
Tank ignites gas injection line connection and ignites gas storage tank, and explosive controller is separately connected indifferent gas storage tank valve, ignites gas storage tank
Valve and ignition firing cable and ignition gas detection cable.
Scheme is further: the indifferent gas is nitrogen, and the ignition gas is oxygen.
Scheme is further: the detectable signal for igniting gas detection probe connects the ignition through signal amplification circuit
Controller, the signal amplification circuit, which is serially connected in ignite in gas detection cable, connect end side with the corresponding interface.
Scheme is further: the ignition ignition tip is electric ignition mouth, and electric ignition mouth connects an electric ignition detonation chain,
The electric ignition detonation chain, which is serially connected in ignite in firing cable, connect end side with the corresponding interface.
Scheme is further: the antiriot air chamber is fire retardant air bag, and metal coating net is provided on the outside of fire retardant.
A kind of shale fracturing process is the method based on above-mentioned shale fracturing device, and device is in determining fracture zone model
Enclose interior implementation explosion, which is characterized in that the described method includes:
The gas extraction in antiriot air chamber is at flat-shaped be attached to around round drill bit step 1: opening aspiration pump
In the groove of disk side wall setting, connection is then turned off by indifferent gas gas ducting port sealing；Simultaneously: disconnect explosive controller with
It ignites firing cable and ignites the connection of gas detection cable, disconnect the connection ignited gas injection line and ignite gas storage tank, open
Dynamic flex-stem drives round drill bit disk rotation drilling, until fracture zone；
Step 2: keeping flex-stem to drive round drill bit disk rotation drilling, when the explosive fracturing that drilling has arrived setting is long
Stop drilling after degree, moves back round drill bit disk and reserve explosion section length space；
Step 3: explosive controller and ignition firing cable and ignition gas detection cable are established connection, by indifferent gas gas tube
Connection is established by air delivery pump and aspiration pump and inertia gas storage tank in road, will ignite gas injection line and ignition gas storage tank is established and connected
It connects；
Step 4: into anti-explosion air-sac inject inert gas make its be expanded to the wall of a borehole will burst section length space and the external world it is close
Envelope；
Step 5: igniting whether gas concentration reaches quick-fried by igniting in gas detection probe detection explosion section length space
Fried condition ignites gas storage tank by igniting gas injection line to explosion section length space if concentration is not up to explosion condition
Interior feeding ignites gas until reaching explosion condition；
Step 6: starting electric ignition detonation chain is exploded in explosion section length space by igniting ignition tip ignition and blasting gas
Realize the pressure break to shale；
7th: opening aspiration pump for the gas extraction in antiriot air chamber and be at flat-shaped be attached to around round drill bit
In the groove of disk side wall setting, connection is then turned off by indifferent gas gas ducting port sealing；Simultaneously: disconnect explosive controller with
It ignites firing cable and ignites the connection of gas detection cable, disconnect the connection ignited gas injection line and ignite gas storage tank, open
Dynamic flex-stem drives round drill bit disk rotation drilling, returns to second step and continuously implements explosion until in determining pressure break area
Implement explosion within the scope of domain to complete.
Scheme is further: the antiriot air chamber is fire retardant air bag, and metal coating net is provided on the outside of fire retardant.
Scheme is further: the explosion condition is the explosion condition determined according to magnitude of explosion.
Scheme is further: the indifferent gas is nitrogen, and the ignition gas is oxygen.
Scheme is further: the detectable signal for igniting gas detection probe connects the ignition through signal amplification circuit
Controller, the signal amplification circuit, which is serially connected in ignite in gas detection cable, connect end side with the corresponding interface；The ignition igniting
Mouth is electric ignition mouth, and electric ignition mouth connects an electric ignition detonation chain, and the electric ignition detonation chain is serially connected in ignition igniting
End side is connect with the corresponding interface in cable.
The present invention has following significant technical advantage compared with current shale gas exploitation method both at home and abroad:
(1) compared with the mode of traditional artificial pressure break, the pressure break of shale is realized in this way, can significantly improve the pressure break of shale
Effect realizes the target for effectively improving shale adsorbed gas burst size.
(2) it by using round drill bit and anti-explosion air-sac, can neatly change the range of blast area, realize with brill
With quick-fried；And it can be recycled, it is easy to operate, it is at low cost.
(3) by the injection rate of concentration real-time display instrument control oxygen, the effect of explosion can accurately be controlled.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is present apparatus entirety junction relationship structure schematic diagram；
Fig. 2 is round drill bit front schematic view；
Fig. 3 circle drill bit side schematic view.
Specific embodiment
Embodiment 1:
A kind of shale fracturing device, as shown in Figure 1, Figure 2 and Figure 3, the shale fracturing device include round drill bit disk 1,
It is identical as traditional drilling tool, the front end face of round drill bit disk is provided with knife rest 2, circle is stretched out in knife rest radial outside end 201
Shape drill bit disk longitudinal end side wall 102, distribution is provided with roller cutter bit 3 and scraper 4 on knife rest, in round drill bit disk
Connection below is followed by flex-stem 5, and flex-stem is connected to ground station, and flex-stem drives round drill bit disk to turn
It is dynamic, unlike traditional drilling tool: around circle drill bit disk radial side end wall setting fluted 103, being arranged in groove
There is the inflatable antiriot air chamber 6 heaved for sealing, round drill bit disk front end face middle section is provided with ignition gas
Body outlet 7 ignites ignition tip 8 and ignites gas detection probe 9, and in round drill bit back-end disk face, middle section is set respectively
Ignition gas vent interface 10, ignition ignition tip interface 11, ignition gas detection probe interface 12 and antiriot air chamber is equipped with to connect
Mouth 13 ignites gas vent interface 10 and passes through round drill bit disk connection ignition gas vent 7, ignites ignition tip interface 11 and connect
It connects and ignites ignition tip 8, ignite the connection of gas detection probe interface 12 and ignite gas detection probe 9, antiriot air chamber interface 13 connects
Antiriot air chamber 6；Axis hole 501 is set in flex-stem, is equipped in axis hole and is ignited gas injection line 14, ignites firing cable
15, ignite gas detection cable 16 and indifferent gas gas ducting 17, by the corresponding interface, the ignition gas injection line with draw
Quick-fried gas vent connection, ignition firing cable connect with ignition ignition tip, ignite gas detection cable and ignite gas detection probe
Connection, indifferent gas gas ducting are connect with antiriot air chamber, and ground station 18 is provided with inertia gas storage tank 19, ignition gas storage
Tank 20 and explosive controller 21, indifferent gas gas ducting connect inertia gas storage tank 19 by air delivery pump 22 and aspiration pump 23, ignite
Gas reservoir 20 is ignited in gas injection line connection, and explosive controller 21 is separately connected indifferent gas storage tank valve 19-1, ignites gas
It storage tank valve 20-1 and ignites firing cable and ignites gas detection cable, there are also driving flex-stems in certain ground station
The driving equipment of rotation.
Wherein: there are many indifferent gas, and what embodiment preferentially selected is nitrogen, and what the ignition gas preferentially selected is
Oxygen.
In embodiment: the detectable signal for igniting gas detection probe connects the guiding detonating controlling through signal amplification circuit
Device, the signal amplification circuit, which is serially connected in ignite in gas detection cable, connect end side with the corresponding interface, that is to say, that is to ignite gas
Physical examination surveys cable close to interface end side.Also, the ignition ignition tip is electric ignition mouth, and electric ignition mouth connects an electric ignition detonation
Circuit, the electric ignition detonation chain, which is serially connected in ignite in firing cable, connect end side with the corresponding interface, that is to say, that is to ignite
Firing cable is close to interface end side.
Fire-retardant canvas or glass wool cloth coating asbestos production can be used as the antiriot air chamber in embodiment
Air bag is provided with metal coating net on the outside of fire retardant, will not with the building stones bored for protecting air bag to flow backward from edge
Air bag is scratched, the antiriot air chamber of Fig. 3 signal is the state in a kind of contraction.
Embodiment 2:
A kind of shale fracturing process, since the main component of shale gas is CH4, when being mixed into O2 and meet certain ratio condition,
Once running into spark, mixed gas will generate explosion.After the completion of the drilling of shale gas well, the shale gas in the shale of gas well periphery can be obtained
To preliminary release.Shale gas well can be made to form a confined space by certain measure, and be injected completely into confined space
The O2 amount of sufficient explosion condition, then igniting makes confined space explode, so that pressure break periphery shale, has thus described in embodiment 1
Shale fracturing device；The present embodiment method is the method based on shale fracturing device described in embodiment 1, therefore, in embodiment 1
Content be construed as a part of the present embodiment content, described device implements explosion, institute within the scope of determining fracture zone
The method of stating includes:
The gas extraction in antiriot air chamber is at flat-shaped be attached to around round drill bit step 1: opening aspiration pump
In the groove of disk side wall setting, connection is then turned off by indifferent gas gas ducting port sealing；Simultaneously: disconnect explosive controller with
It ignites firing cable and ignites the connection of gas detection cable, disconnect the connection ignited gas injection line and ignite gas storage tank, open
Dynamic flex-stem drives round drill bit disk rotation drilling, until fracture zone；
Step 2: keeping flex-stem to drive round drill bit disk rotation drilling, when the explosive fracturing that drilling has arrived setting is long
Stop drilling after degree, move back round drill bit disk, as shown in Figure 1, reserving explosion section length space 24；
Step 3: explosive controller and ignition firing cable and ignition gas detection cable are established connection, by indifferent gas gas tube
Connection is established by air delivery pump and aspiration pump and inertia gas storage tank in road, will ignite gas injection line and ignition gas storage tank is established and connected
It connects；
Step 4: into anti-explosion air-sac inject inert gas make its be expanded to the wall of a borehole will burst section length space and the external world it is close
Envelope；
Step 5: igniting whether gas concentration reaches quick-fried by igniting in gas detection probe detection explosion section length space
Fried condition ignites gas storage tank by igniting gas injection line to explosion section length space if concentration is not up to explosion condition
Interior feeding ignites gas until reaching explosion condition；
Step 6: starting electric ignition detonation chain is exploded in explosion section length space by igniting ignition tip ignition and blasting gas
Realize the pressure break to shale；
7th: opening aspiration pump for the gas extraction in antiriot air chamber and be at flat-shaped be attached to around round drill bit
In the groove of disk side wall setting, connection is then turned off by indifferent gas gas ducting port sealing；Simultaneously: disconnect explosive controller with
It ignites firing cable and ignites the connection of gas detection cable, disconnect the connection ignited gas injection line and ignite gas storage tank, open
Dynamic flex-stem drives round drill bit disk rotation drilling, returns to second step and continuously implements explosion until in determining pressure break area
Implement explosion within the scope of domain to complete.
In embodiment: the explosion condition is the explosion condition determined according to magnitude of explosion；That is, passing through the method
According to the degree needs of explosion, gas concentration is ignited in adjustment explosion section length space, it is made to reach spalling degree need
It is ignited under conditions of wanting.This method can accurately can be controlled quick-fried by the injection rate of concentration real-time display instrument control oxygen
Fried effect.
Same as Example 1: the antiriot air chamber is fire retardant air bag, and metal coating net is provided on the outside of fire retardant.
And: the indifferent gas is nitrogen, and the ignition gas is oxygen.The detectable signal for igniting gas detection probe is through signal
Amplifying circuit connects the explosive controller, and the signal amplification circuit is serially connected in ignite in gas detection cable to be connected with the corresponding interface
Connect end side.The ignition ignition tip is electric ignition mouth, and electric ignition mouth connects an electric ignition detonation chain, the electric ignition detonation
Circuit, which is serially connected in ignite in firing cable, connect end side with the corresponding interface.
Claims (10)
1. a kind of shale fracturing device, including round drill bit disk are provided with knife rest in the front end face of round drill bit disk,
Round drill bit disk radial sidewalls are stretched out in knife rest radial outside end, and distribution is provided with roller cutter bit on knife rest, dig in circle
Connection is followed by flex-stem behind into drill bit disk, and flex-stem is connected to ground station, and flex-stem drives round driving
The rotation of drill bit disk, which is characterized in that it is fluted around circle drill bit disk radial sidewalls setting, it is provided in groove for close
The inflatable antiriot air chamber heaved of envelope is provided in round drill bit disk front end face middle section and ignites gas vent, draws
Burst point nozzles and ignition gas detection probe, in round drill bit back-end disk face, middle section is respectively arranged with and ignites gas
Body outlet ignites ignition tip, ignites the corresponding interface that gas detection probe and antiriot air chamber are connected, and sets in flex-stem
It is equipped with and ignites gas injection line, ignite firing cable, ignite gas detection cable and indifferent gas gas ducting, by accordingly connecing
Mouthful, the ignitions gas injection line connect with ignition gas vent, ignites firing cable connect with ignition ignition tip, ignites gas
Physical examination survey cable is connect with ignition gas detection probe, indifferent gas gas ducting is connect with antiriot air chamber, is arranged in ground station
There is inertia gas storage tank, ignite gas storage tank and explosive controller, indifferent gas gas ducting connects inertia with aspiration pump by air delivery pump
Gas storage tank ignites gas injection line connection and ignites gas storage tank, and explosive controller is separately connected indifferent gas storage tank valve, ignites gas
Storage tank valve and ignition firing cable and ignition gas detection cable.
2. shale fracturing device according to claim 1, which is characterized in that the indifferent gas is nitrogen, the ignition gas
It is oxygen.
3. shale fracturing device according to claim 1, which is characterized in that the detectable signal for igniting gas detection probe
The explosive controller is connected through signal amplification circuit, the signal amplification circuit is serially connected in ignition gas detection cable and corresponding
Interface connection end side.
4. shale fracturing device according to claim 1, which is characterized in that the ignition ignition tip is electric ignition mouth, electric point
Nozzles connect an electric ignition detonation chain, and the electric ignition detonation chain is serially connected in ignite in firing cable to be connected with the corresponding interface
Connect end side.
5. shale fracturing device according to claim 1, which is characterized in that the antiriot air chamber is fire retardant air bag, is being hindered
Metal coating net is provided on the outside of combustion cloth.
6. a kind of shale fracturing process is the method based on shale fracturing device described in claim 1, device is in determining pressure break
Implement explosion in regional scope, which is characterized in that the described method includes:
The gas extraction in antiriot air chamber is at flat-shaped be attached to around round drill bit step 1: opening aspiration pump
In the groove of disk side wall setting, connection is then turned off by indifferent gas gas ducting port sealing；Simultaneously: disconnect explosive controller with
It ignites firing cable and ignites the connection of gas detection cable, disconnect the connection ignited gas injection line and ignite gas storage tank, open
Dynamic flex-stem drives round drill bit disk rotation drilling, until fracture zone；
Step 2: keeping flex-stem to drive round drill bit disk rotation drilling, when the explosive fracturing that drilling has arrived setting is long
Stop drilling after degree, moves back round drill bit disk and reserve explosion section length space；
Step 3: explosive controller and ignition firing cable and ignition gas detection cable are established connection, by indifferent gas gas tube
Connection is established by air delivery pump and aspiration pump and inertia gas storage tank in road, will ignite gas injection line and ignition gas storage tank is established and connected
It connects；
Step 4: into anti-explosion air-sac inject inert gas make its be expanded to the wall of a borehole will burst section length space and the external world it is close
Envelope；
Step 5: igniting whether gas concentration reaches quick-fried by igniting in gas detection probe detection explosion section length space
Fried condition ignites gas storage tank by igniting gas injection line to explosion section length space if concentration is not up to explosion condition
Interior feeding ignites gas until reaching explosion condition；
Step 6: starting electric ignition detonation chain is exploded in explosion section length space by igniting ignition tip ignition and blasting gas
Realize the pressure break to shale；
The gas extraction in antiriot air chamber is at flat-shaped be attached to around round drill bit step 7: opening aspiration pump
In the groove of disk side wall setting, connection is then turned off by indifferent gas gas ducting port sealing；Simultaneously: disconnect explosive controller with
It ignites firing cable and ignites the connection of gas detection cable, disconnect the connection ignited gas injection line and ignite gas storage tank, open
Dynamic flex-stem drives round drill bit disk rotation drilling, returns to second step and continuously implements explosion until in determining pressure break area
Implement explosion within the scope of domain to complete.
7. shale fracturing process according to claim 6, which is characterized in that the antiriot air chamber is fire retardant air bag,
Metal coating net is provided on the outside of fire retardant.
8. shale fracturing process according to claim 6, which is characterized in that the explosion condition is true according to magnitude of explosion
Fixed explosion condition.
9. shale fracturing process according to claim 6, which is characterized in that the indifferent gas is nitrogen, the ignition gas
Body is oxygen.
10. shale fracturing process according to claim 6, which is characterized in that the detection for igniting gas detection probe
Signal connects the explosive controller through signal amplification circuit, the signal amplification circuit be serially connected in ignite in gas detection cable with
The corresponding interface connects end side；The ignition ignition tip is electric ignition mouth, and electric ignition mouth connects an electric ignition detonation chain, described
Electric ignition detonation chain, which is serially connected in ignite in firing cable, connect end side with the corresponding interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663825.4A CN110284866B (en) | 2019-07-23 | 2019-07-23 | Shale fracturing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663825.4A CN110284866B (en) | 2019-07-23 | 2019-07-23 | Shale fracturing device and method |
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| CN110284866A true CN110284866A (en) | 2019-09-27 |
| CN110284866B CN110284866B (en) | 2024-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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