CN105909228A - Pulse high-pressure hydraulic slotting and fracturing device and method - Google Patents
Pulse high-pressure hydraulic slotting and fracturing device and method Download PDFInfo
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- CN105909228A CN105909228A CN201610496407.7A CN201610496407A CN105909228A CN 105909228 A CN105909228 A CN 105909228A CN 201610496407 A CN201610496407 A CN 201610496407A CN 105909228 A CN105909228 A CN 105909228A
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- 238000000034 method Methods 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 222
- 239000003245 coal Substances 0.000 claims abstract description 30
- 238000000605 extraction Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 238000010276 construction Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 13
- 238000005553 drilling Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 210000001367 artery Anatomy 0.000 claims description 5
- 210000003462 vein Anatomy 0.000 claims description 5
- 239000003818 cinder Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000008450 motivation Effects 0.000 claims description 2
- 239000008400 supply water Substances 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 6
- 230000035699 permeability Effects 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000002085 persistent effect Effects 0.000 description 3
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel 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
-
- 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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- 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)
- Earth Drilling (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention provides a pulse high-pressure hydraulic slotting and fracturing device and method and relates to the field of coal mine gas extraction. The device comprises a central console, a water conveyor, a hydraulic slotting and fracturing system and a pulse water pressure generating system; the pulse water pressure generating system comprises a high-pressure water subsystem and a pulse high-pressure water frequency generating subsystem; the high-pressure water subsystem is connected with the water inlet of the water conveyor through a water injecting pipe, and the water outlet of the water conveyor is communicated with the hydraulic slotting and fracturing system; the pulse high-pressure water frequency generating subsystem comprises an electromotor and a spherical valve, the spherical valve is arranged on the water injecting pipe, and the electromotor is connected with the spherical valve; the central console is connected with the high-pressure water subsystem and the electromotor. The method comprises the following steps: constructing a slotting and fracturing hole and a drainage hole; through the pulse high-pressure hydraulic slotting and fracturing device, performing pulse hydraulic radial slotting and hydraulic fracturing on the slotting and fracturing hole. The pulse high-pressure hydraulic slotting and fracturing device and method solve the technical problems in the prior art that the effective drainage radius is small, and the crack expansion is disordered.
Description
Technical field
The present invention relates to coal mine gas drainage field, particularly relate to a kind of high voltage pulse hydraulic slotted liner technique-fracturing device and side
Method.
Background technology
In recent years, China's coal-mine, along with the increase of the exploitation time limit, extends to deep with the speed of 20-50m, great Liang Kuang every year
Well has been enter into deep mining, owing to geological structure is complicated with condition of coal seam occurrence, causes coal bed gas extraction weak effect, it is impossible to disappear
Except Coal Seam Outburst Hazard, a gas control difficult problem for the most single low air permeability coal seam is urgently to be resolved hurrily.The each big mining area of China is single
One low air permeability coal seam generally exists, and the single coal bed accounting with outburst hazard is about 35-49%, is easily caused coal and gas
The generation of prominent accident.Present stage, the hydraulic slotted liner technique of commonly used single constant pressure that colliery waterpower is anti-reflection or fracturing technique, bag
Include water system and hydraulic slotted liner technique and frac system, water system implement hydraulic slotted liner technique to hydraulic slotted liner technique and frac system water supply
And pressure break.Described hydraulic slotted liner technique and frac system include rig, and the drilling rod of described rig connects voltage-controlled drill bit, existing rig and
Voltage-controlled drill bit is all to use constant pressure water to carry out hydraulic slotted liner technique and pressure break.Slot depth as shallow, effective extraction half in actual application
Footpath is little, cracks can spread is unordered, the persistent period is short, causes that coal seam antireflective effect is poor, gas pumping rate is relatively low, seam mining process
Middle gas frequently transfinites and happens occasionally, the safety in production of serious threat mine.
Based on this, the invention provides a kind of high voltage pulse hydraulic slotted liner technique-fracturing device and method to solve above-mentioned skill
Art problem.
Summary of the invention
It is an object of the invention to provide a kind of high voltage pulse hydraulic slotted liner technique-fracturing device, to solve existing constant pressure
Power hydraulic slotted liner technique or the effective drainage radius of fracturing technique is little, cracks can spread is unordered, the persistent period is short, causes coal seam antireflective effect relatively
The technical problem that difference, gas pumping rate are relatively low, can be effectively improved single low air permeability coal seam release effect, permeability coefficient and hold
The continuous time, hence it is evident that promote the gas pumping efficiency of low air permeability coal seam.
Based on above-mentioned purpose, the invention provides a kind of high voltage pulse hydraulic slotted liner technique-fracturing device, including central authorities' control
Platform, water delivery apparatus, hydraulic slotted liner technique and frac system and the raw system of pulsating water Hair Fixer；The raw system of described pulsating water Hair Fixer includes water under high pressure
Subsystem and high voltage pulse water frequency generation subsystem；
Described water under high pressure subsystem is used for providing water under high pressure；Described hydraulic slotted liner technique and the frac system waterpower for coal seam are cut
Seam and pressure break；
The water inlet of described water under high pressure subsystem and described water delivery apparatus is connected by water injection pipe, the outlet of described water delivery apparatus
Connect with described hydraulic slotted liner technique and frac system；
Described high voltage pulse water frequency generation subsystem includes that motor and globe valve, described globe valve are arranged on described note
On water pipe, described motor is connected with described globe valve；
Described central control board is connected with described water under high pressure subsystem and described motor respectively, is used for controlling described high pressure
Water subsystem and the rotating speed of described motor.
Optionally, high voltage pulse water frequency generation subsystem also includes decelerator and converter；Described central control board with
Described converter connects；Described converter is connected with described motor, and described motor is connected with described decelerator, described deceleration
Device is connected with described globe valve.
Optionally, described water under high pressure subsystem includes water tank, and the outlet of described water tank is by water-supply-pipe with water injecting pump even
Connect；Described water injecting pump is connected with described water delivery apparatus by described water injection pipe；
Being additionally provided with pressure transducer on described water injection pipe, described pressure transducer is positioned at described globe valve and described note
Between water pump；
Described pressure transducer is all connected with described central control board with described water injecting pump.
Optionally, described water injection pipe being additionally provided with stop valve, described stop valve is connected with described central control board；Institute
State stop valve between described pressure transducer and described water injecting pump；
Described water injection pipe is provided with backwater branch road, described backwater branch road and institute between described stop valve and described water injecting pump
State the water return outlet connection of water tank, described backwater branch road is provided with overflow valve.
Optionally, described hydraulic slotted liner technique and frac system include rig, and the drilling rod of described rig connects voltage-controlled drill bit；
The outlet of described water delivery apparatus and the pipeline connection of described rig.
Optionally, described central control board control system centered by PLC control system.
Based on above-mentioned purpose, present invention also offers a kind of high voltage pulse hydraulic slotted liner technique-fracturing process,
Described high voltage pulse hydraulic slotted liner technique-fracturing process includes step 1, construction slot-pressure break hole and extraction hole；
Step 2, by described high voltage pulse hydraulic slotted liner technique-fracturing device, described slot-pressure break hole is carried out pulsed water
Radially slot；
Step 3, by described high voltage pulse hydraulic slotted liner technique-fracturing device, described slot-pressure break hole is carried out pulsed water
Pressure break.
Optionally, in described step 1, described slot-pressure break hole with the construction method in described extraction hole is, it is first determined coal
Bore position when constructing in Ceng and the spacing of wells, then two extraction holes of construction, the spacing in two extraction holes is that twice is bored
Pitch of holes, then in the construction slot-pressure break hole, center in two described extraction holes.
Optionally, in described step 2, pulse radially slot construction method includes:
Step 21, is connected aperture slag-draining device with described slot-pressure break hole by sealing of hole pipeline；
Step 22, keeps described globe valve to be closed, and described central control board starts described water under high pressure subsystem
Supply water in described water injection pipe；
Step 23, when the hydraulic pressure in described water injection pipe reaches certain value, described central control board sends instruction and opens institute
State motor, by the continuous opening and closing of globe valve described in described Motor Control, form high voltage pulse water；
Step 24, described high voltage pulse water is delivered to hydraulic slotted liner technique and frac system by described water delivery apparatus and cuts described
Hydraulic slotted liner technique is implemented in seam-pressure break hole, and the waste water of generation, cinder and gas are by described slot-pressure break hole and described hole sealing tube
Road enters described aperture slag-draining device；
Optionally, pulsed water pressing crack construction method is: after pulse radially slot enforcement, exit described hydraulic slotted liner technique
And frac system to setting position, reduce hydraulic pressure to setting value, and pressure break aperture install hole packer, by described hydraulic slotted liner technique
And frac system is to slot-pressure break hole enforcement pulsed water pressure break.
High voltage pulse hydraulic slotted liner technique-fracturing device that the present invention provides, on the basis of existing hydraulic slotted liner technique or pressure break,
Set water flow pressure and change frequency, by the current of existing single constant pressure, become high voltage pulse water, high by pulse
Setting-out carries out hydraulic slotted liner technique.This device includes that central control board, water delivery apparatus, hydraulic slotted liner technique and frac system and pulsating water Hair Fixer are raw
System；The raw system of described pulsating water Hair Fixer includes water under high pressure subsystem and high voltage pulse water frequency generation subsystem.First by height
Setting-out subsystem supplies water, and injects in water injection pipe, central control board controls motor, then by Motor Control globe valve.Initially
State globe valve cuts out, and when in water injection pipe, hydraulic pressure reaches certain value, central control board sends instruction actuating motor, to control
The regular opening and closing that described globe valve is lasting, thus form high voltage pulse water.Then described waterpower is supplied by described water delivery apparatus
Slot and frac system, it is achieved pulsed water slot and pressure break.
Described high voltage pulse hydraulic slotted liner technique-fracturing device that the present invention provides, changes the water of existing constant pressure water
Power slot and pressure break, changing constant voltage water is pulsating water, use pulsating water carry out pressure break and slot, it is possible to make coal body repeatedly bear draw should
The effect of power and compressive stress, causes coal body generation tensile failure, draws to break and bad break bad with pressure.
It has the beneficial effect that (1) carries out pulsed water pressure break on the basis of pulsed water slot, and boring can be made effectively to take out
Putting radius ratio uses single hydraulic slotted liner technique or fracturing technique substantially to increase, and can effectively reduce the quantities of drilling construction；
(2) high voltage pulse hydraulic slotted liner technique-fracturing technique can make the abundant release of coal body anti-reflection, can effectively promote coal body breathability
Coefficient, and can substantially increase the high flow capacity gas drainage under suction persistent period, can effectively promote the gas pumping efficiency in coal seam；
(3) high voltage pulse hydraulic slotted liner technique-fracturing technique can effectively control direction of crack propagation in pulsed water pressure break, can have
Effect prevents top, coal seam, base plate secondary disaster accident from occurring.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is high voltage pulse hydraulic slotted liner technique-fracturing device schematic diagram in the embodiment of the present invention；
Fig. 2 is slag-draining device front view in aperture in the embodiment of the present invention；
Fig. 3 is slag-draining device top view in aperture in the embodiment of the present invention；
Fig. 4 is slag-draining device right view in aperture in the embodiment of the present invention；
In Fig. 5 embodiment of the present invention, schematic diagram is arranged in high voltage pulse hydraulic slotted liner technique-pressure break boring.
Reference:
1-central control board；2-water delivery apparatus；3-water tank；
4-water-supply-pipe；5-water injecting pump；6-water injection pipe；
7-motor；8-globe valve；9-pressure transducer；
10-stop valve；11-overflow valve；12-rig；
The voltage-controlled drill bit of 13-；14-decelerator；15-converter；
16-slot-pressure break hole；17-extraction hole；18-aperture slag-draining device；
181-casing；182-slag inlet；183-outlet；
184-slag notch；185-drawing-off gas mouth；19-coal seam.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Embodiment one
As it is shown in figure 1, provide a kind of high voltage pulse hydraulic slotted liner technique-fracturing device in the present embodiment, described pulse is high
Pressure hydraulic slotted liner technique-fracturing device includes central control board 1, water delivery apparatus 2, hydraulic slotted liner technique and frac system and the raw system of pulsating water Hair Fixer
System；The raw system of described pulsating water Hair Fixer includes water under high pressure subsystem and high voltage pulse water frequency generation subsystem；
Described water under high pressure subsystem is used for providing water under high pressure；Described hydraulic slotted liner technique and the frac system waterpower for coal seam are cut
Seam and pressure break；Described water under high pressure subsystem includes water tank 3, and the outlet of described water tank 3 is connected with water injecting pump 5 by water-supply-pipe 4；
Described water injecting pump 5 is connected with described water delivery apparatus 2 by described water injection pipe 6；
Described high voltage pulse water frequency generation subsystem includes that motor 7 and globe valve 8, described globe valve 8 are arranged on institute
Stating on water injection pipe 6, described motor 7 is connected with described globe valve 8；
Being additionally provided with pressure transducer 9 on described water injection pipe 6, described pressure transducer 9 is positioned at described globe valve 8 and institute
State between water injecting pump 5；
Described pressure transducer 9 is all connected with described central control board 1 with described water injecting pump 5；On described water injection pipe 6 also
Being provided with stop valve 10, described stop valve 10 is connected with described central control board 1；Described stop valve 10 is positioned at described pressure and passes
Between sensor 9 and described water injecting pump 5；
Described water injection pipe 6 is provided with backwater branch road, described backwater branch road between described stop valve 10 and described water injecting pump 5
Connect with the water return outlet of described water tank 3, described backwater branch road is provided with overflow valve 11；
Described hydraulic slotted liner technique and frac system include rig 12, and the drilling rod of described rig 12 connects voltage-controlled drill bit 13；
The outlet of described water delivery apparatus 2 and the pipeline connection of described rig 12；
Described central control board 1 is connected with described water under high pressure subsystem and described motor 7 respectively, is used for controlling described height
The opening and closing that setting-out subsystem and described motor 7 connect.
High voltage pulse hydraulic slotted liner technique-fracturing device that the present invention provides, on the basis of existing hydraulic slotted liner technique or pressure break,
Set water flow pressure and change frequency, by the current of existing single constant pressure, become high voltage pulse water, high by pulse
Setting-out carries out hydraulic slotted liner technique.There are the current of existing single constant pressure, become pulse water flow, cut by pulsed water
Seam.This device includes central control board 1, water delivery apparatus 2, hydraulic slotted liner technique and frac system and the raw system of pulsating water Hair Fixer；Described arteries and veins
The raw system of bath Hair Fixer includes water under high pressure subsystem and high voltage pulse water frequency generation subsystem.First, central control board 1 sends
Instruction starts described water injecting pump 5, is injected in described water injection pipe 6 by the water in water tank 3.Motor 7 is controlled by central control board 1,
Controlled globe valve 8 by motor 7 again, by the rotation of motor output shaft, drive the valve of globe valve 8 not stop rotary opening closing.
Original state globe valve 8 cuts out, and when in water injection pipe 6, hydraulic pressure reaches certain value, (pressure is detected by pressure transducer 9, reaches one
Definite value feeds back to central control board 1), central control board 1 sends instruction actuating motor 7, motor 7 control described globe valve
8 lasting regular opening and closings, thus form high voltage pulse water.Arteries and veins is filled water under high pressure and is delivered on rig 12 by water delivery apparatus 2
Drilling rod, is delivered to voltage-controlled drill bit 13 by high voltage pulse water.Voltage-controlled drill bit 13 is that conventional multi-functional drill-cut is bit Integrated, energy
Enough realization boring is integrated with slot, after slot, reduces hydraulic pressure to setting value to change the Working mould of voltage-controlled drill bit 13
Formula, it is achieved pressure break function.After high voltage pulse water is delivered to voltage-controlled drill bit 13, rig 12 control to implement pulsed water slot.When
Slot is complete, and central control board 1 sends instruction opening stop valve 10；When in backwater branch road, hydraulic pressure reaches setting value, overflow valve
11 automatically turn on, and water under high pressure is back to water tank 3.Pulsed water slot implement after, exit drilling rod and drill bit to setting position,
Reduction hydraulic pressure is to setting value, and installs hole packer in pressure break aperture, and changes voltage-controlled drill bit 13 to pressure break pattern, repeats above-mentioned product
The step of raw pulsating water, conveying pulsating water, to voltage-controlled drill bit 13, continues to implement pulsed water pressure break.
Described high voltage pulse hydraulic slotted liner technique-fracturing device that the present invention provides, changes the water of existing constant pressure water
Power slot and pressure break, changing constant voltage water is pulsating water, use pulsating water carry out pressure break and slot, it is possible to make coal body repeatedly bear draw should
The effect of power and compressive stress, causes coal body generation tensile failure, draws to break and bad break bad with pressure.
It has the beneficial effect that (1) carries out pulsed water pressure break on the basis of pulsed water slot, and boring can be made effectively to take out
Putting radius ratio uses single hydraulic slotted liner technique or fracturing technique substantially to increase, and can effectively reduce the quantities of drilling construction；
(2) high voltage pulse hydraulic slotted liner technique-fracturing technique can make the abundant release of coal body anti-reflection, increases high flow capacity gas drainage under suction and holds
The continuous time, can effectively promote the gas pumping efficiency in coal seam；
(3) high voltage pulse hydraulic slotted liner technique-fracturing technique can effectively control direction of crack propagation in pulsed water pressure break, not only
The effective drainage radius of boring can be increased, and can prevent top, base plate secondary disaster accident from occurring.
Such as Fig. 1, in the alternative of the present embodiment, high voltage pulse water frequency generation subsystem also includes decelerator 14 and becomes
Frequently device 15；Described central control board 1 is connected with described converter 15；Described converter 15 is connected with described motor 7, described electricity
Motivation 7 is connected with described decelerator 14, and described decelerator is connected with described globe valve 8.
Described motor 7 is connected with converter 15 by data line, is controlled by central control board 1, controls
Motor 7 starts, and regulates motor 7 rotating speed by converter 15, reduces output speed through decelerator, thus is automatically adjusted ball
The open and close frequency of shape valve 8, can produce high voltage pulse water in water injection pipe 6 and be automatically adjusted the pulse frequency of water under high pressure.
The setting of converter 15 and decelerator achieves the regulation of pulse frequency, it is simple to control.
In the alternative of the present embodiment, described central control board 1 control system centered by PLC control system.
PLC is logic controller, and described central control board 1 is designed centered by PLC control system, main realize with
Lower function:
(1) startup and the closedown of water injecting pump 5 are controlled；
(2) startup and the closedown of stop valve 10 are controlled；
(3) the hydraulic pressure size of pressure transducer 9 is shown；
(4) control high voltage pulse water frequency generation subsystem, open and close with setpoint frequency.
In the alternative of the present embodiment, described water-supply-pipe 4 and described water injection pipe 6 use steel whip pipe.
Globe valve is suitable on pipeline using the opening and closing controlling liquid flowing, and technology maturation is easy to use.
In the alternative of the present embodiment, the slot nozzle 2-3 of described voltage-controlled drill bit 13, in 180 ° or 120 ° distributions,
Slot nozzle diameter 2.5mm.
Embodiment two
Described high voltage pulse hydraulic slotted liner technique-fracturing process that the present embodiment provides, is different from existing constant pressure water
Constant hydraulic slotted liner technique-fracturing process, is on the basis of described high voltage pulse hydraulic slotted liner technique-fracturing device that embodiment one provides
High voltage pulse hydraulic slotted liner technique-the fracturing process realized.
Specifically, such as Fig. 1-5, described high voltage pulse hydraulic slotted liner technique-fracturing process includes:
Step 1, construction slot-pressure break hole 16 and extraction hole 17；
First determining bore position when constructing in coal seam 19 and spacing of wells d, then construction gets out two extraction holes
17, the spacing in two extraction holes 17 is the twice spacing of wells and 2d, then the center in two described extraction holes 17 get out slot-
Pressure break hole 16.
Step 2, by described high voltage pulse hydraulic slotted liner technique-fracturing device, described slot-pressure break hole 16 is carried out pulsating water
Power radially slot, the slot nozzle 2-3 of voltage-controlled drill bit 13, in 180 ° or 120 ° distributions, slot nozzle diameter 2.5mm；
(1) aperture slag-draining device 18 is connected with described slot-pressure break hole 16 by sealing of hole pipeline；
(2) after slot of having constructed-pressure break hole 16, keeping described globe valve 8 to be closed, described central authorities control
Platform 1 starts described water under high pressure subsystem and supplies water in described water injection pipe 6.The most described central control board 1 sends instruction and starts
Water injecting pump 5, injects the water in water tank 3 in water injection pipe 6；
(3) when the hydraulic pressure in water injection pipe 6 reaches certain value, (pressure is detected by pressure transducer 9, reaches certain value feedback
To central control board 1), central control board 1 sends instruction and opens described motor 7, regulates 7 turns of motor by converter 15
Speed, reduces output speed through decelerator, thus is automatically adjusted the open and close frequency of globe valve 8, can produce in water injection pipe 6
Give birth to high voltage pulse water and be automatically adjusted the pulse frequency of water under high pressure；
(4) voltage-controlled drill bit being placed in slot pattern, described high voltage pulse water is delivered to waterpower by described water delivery apparatus 2 and is cut
Seam and frac system, after being the most finally delivered to voltage-controlled drill bit 13, controlled to implement pulsed water slot by rig 12；Produce
Waste water, cinder and gas enter aperture slag-draining device 18 by described slot-pressure break hole 16 and described sealing of hole pipeline；Pulsation water
Power slot with certain step pitch from boring end progressively move to hole top.Described aperture slag-draining device 18 uses existing aperture
Slag-draining device 18, including casing 181, casing is provided with slag inlet 182, outlet 183, slag notch 184 and drawing-off gas mouth
185.The slag inlet of described aperture slag-draining device 18 is connected with slot-pressure break hole 16, by drawing-off gas mouth by sealing of hole pipeline
It is connected with the gas drainage pipeline of mine.
Step 3, by described high voltage pulse hydraulic slotted liner technique-fracturing device, described slot-pressure break hole 16 is carried out pulsating water
Defeat and split.
After pulsed water slot is implemented, centre control station sends instruction opening stop valve 10；When hydraulic pressure in backwater branch road
When reaching setting value, overflow valve 11 automatically turns on, and water under high pressure is back to water tank 3.Exit drilling rod and drill bit to setting position, reduction
Hydraulic pressure is to setting value, and changes voltage-controlled drill bit 13 to pressure break pattern, and installs hole packer in pressure break aperture, repeats above-mentioned generation arteries and veins
Bath and the step of conveying water, conveying pulsating water, to voltage-controlled drill bit 13, continues to implement pulsed water pressure break.
After the whole technological process of technology that completes that pulsed water slot-pressure break is anti-reflection, by slot-pressure break hole 16 and two extractions
Hole 17 is incorporated to mine gas drainage pipeline and investigates gas drainage under suction effect.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. high voltage pulse hydraulic slotted liner technique-fracturing device, it is characterised in that include central control board, water delivery apparatus, hydraulic slotted liner technique
And the raw system of frac system and pulsating water Hair Fixer；The raw system of described pulsating water Hair Fixer includes water under high pressure subsystem and high voltage pulse water
Frequency generation subsystem；
Described water under high pressure subsystem is used for providing water under high pressure；Hydraulic slotted liner technique for coal seam of described hydraulic slotted liner technique and frac system and
Pressure break；
The water inlet of described water under high pressure subsystem and described water delivery apparatus is connected by water injection pipe, the outlet of described water delivery apparatus and institute
State hydraulic slotted liner technique and frac system connection；
Described high voltage pulse water frequency generation subsystem includes that motor and globe valve, described globe valve are arranged on described water injection pipe
On, described motor is connected with described globe valve；
Described central control board is connected with described water under high pressure subsystem and described motor respectively, is used for controlling described water under high pressure
System and the rotating speed of described motor.
High voltage pulse hydraulic slotted liner technique-fracturing device the most according to claim 1, it is characterised in that high voltage pulse water frequency
Subsystem is occurred also to include decelerator and converter；Described central control board is connected with described converter；Described converter and institute
Stating motor to connect, described motor is connected with described decelerator, and described decelerator is connected with described globe valve.
High voltage pulse hydraulic slotted liner technique-fracturing device the most according to claim 2, it is characterised in that described water under high pressure subsystem
System includes water tank, and the outlet of described water tank is connected with water injecting pump by water-supply-pipe；Described water injecting pump by described water injection pipe with
Described water delivery apparatus connects；
Being additionally provided with pressure transducer on described water injection pipe, described pressure transducer is positioned at described globe valve and described water injecting pump
Between；
Described pressure transducer is all connected with described central control board with described water injecting pump.
High voltage pulse hydraulic slotted liner technique-fracturing device the most according to claim 3, it is characterised in that on described water injection pipe also
Being provided with stop valve, described stop valve is connected with described central control board；Described stop valve be positioned at described pressure transducer and
Between described water injecting pump；
Described water injection pipe is provided with backwater branch road, described backwater branch road and described water between described stop valve and described water injecting pump
The water return outlet connection of case, described backwater branch road is provided with overflow valve.
High voltage pulse hydraulic slotted liner technique-fracturing device the most according to claim 3, it is characterised in that described hydraulic slotted liner technique and
Frac system includes rig, and the drilling rod of described rig connects voltage-controlled drill bit；
The outlet of described water delivery apparatus and the pipeline connection of described rig.
High voltage pulse hydraulic slotted liner technique-fracturing device the most according to claim 4, it is characterised in that described central control board
Control system centered by PLC control system.
7. a high voltage pulse waterpower based on the high voltage pulse hydraulic slotted liner technique-fracturing device described in any one of claim 1-6
Slot-fracturing process, it is characterised in that described high voltage pulse hydraulic slotted liner technique-fracturing process includes:
Step 1, construction slot-pressure break hole and extraction hole；
Step 2, by described high voltage pulse hydraulic slotted liner technique-fracturing device described slot-pressure break hole carried out pulsed water radially
Slot；
Step 3, by described high voltage pulse hydraulic slotted liner technique-fracturing device, described slot-pressure break hole is carried out pulsed water pressure break.
High voltage pulse hydraulic slotted liner technique-fracturing process the most according to claim 7, it is characterised in that in described step 1, institute
The construction method stating slot-pressure break hole and described extraction hole is, it is first determined bore position when constructing in coal seam and boring
Spacing, then two extraction holes of construction, the spacing in two extraction holes is the twice spacing of wells, then in two described extraction holes
Construction slot-pressure break hole, center.
High voltage pulse hydraulic slotted liner technique-fracturing process the most according to claim 7, it is characterised in that in described step 2, arteries and veins
Punching radially slot construction method includes:
Step 21, is connected aperture slag-draining device with described slot-pressure break hole by sealing of hole pipeline；
Step 22, keeps described globe valve to be closed, and described central control board starts described water under high pressure subsystem to institute
Supply water in stating water injection pipe；
Step 23, when the hydraulic pressure in described water injection pipe reaches certain value, described central control board sends instruction and opens described electricity
Motivation, by the continuous opening and closing of globe valve described in described Motor Control, forms high voltage pulse water；
Step 24, described high voltage pulse water is delivered to hydraulic slotted liner technique and frac system to described slot-pressure by described water delivery apparatus
Ceasma implements hydraulic slotted liner technique, and the waste water of generation, cinder are entered by described slot-pressure break hole and described sealing of hole pipeline with gas
Described aperture slag-draining device；
High voltage pulse hydraulic slotted liner technique-fracturing process the most according to claim 7, it is characterised in that pulsed water pressure break is executed
Work method is: after pulse radially slot is implemented, exit described hydraulic slotted liner technique and frac system to setting position, reduce hydraulic pressure
To setting value, and install hole packer in pressure break aperture, by described hydraulic slotted liner technique and frac system, arteries and veins is implemented in slot-pressure break hole
Rush fracturing.
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