CN108222839A - Multi-electrode electric crushing drill bit and electric crushing experimental device - Google Patents
Multi-electrode electric crushing drill bit and electric crushing experimental device Download PDFInfo
- Publication number
- CN108222839A CN108222839A CN201810057146.8A CN201810057146A CN108222839A CN 108222839 A CN108222839 A CN 108222839A CN 201810057146 A CN201810057146 A CN 201810057146A CN 108222839 A CN108222839 A CN 108222839A
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- drill bit
- pair
- rock
- electricity
- electric
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention relates to a multi-electrode-pair electric crushing drill bit and an electric crushing experimental device, which are powered by electric pulses, wherein the rising edge time of an output pulse power supply is 50ns-500ns, a plasma channel is firstly generated in rock by breakdown, the rock is crushed electrically, the drill bit is provided with a plurality of electrode pairs, and the electrodes are in point contact with the rock, so that the multi-electrode-pair electric crushing drill bit has the characteristics of high rock crushing efficiency and low crushing energy consumption; the electric breaking experimental device can simulate rocks in a high-voltage environment, carry out electric pulse breaking drilling experiments, study drill bit electrodes, insulating materials, drilling parameters, rock breaking mechanisms of multiple physical fields and the like, and has the characteristics of simple structure, high reliability and the like. Electric pulse rock breaking drilling is a rock breaking drilling mode which has potential and is close to industrialization so far.
Description
Technical field
The present invention relates to drilling fields, and drill bit and electric crushing experiment are crushed more specifically to a kind of multi-pair electrodes electricity
Device.
Background technology
The exploration and developments drilling applications such as petroleum gas constantly extend, and the research of efficient rock-breaking drilling technology is imperative,
Improve drilling efficiency.Traditional machinery drilling has that drilling efficiency is low, drilling well expense in deep hole, the superdeep holes for boring high temperature and pressure
With it is high the shortcomings of.The non-mechanical broken rock mode in current more forward position mainly has：Rock breaking by water jet, particle stream flow broken rock, laser
Well drilling and rock crushing, plasma broken rock, ultrasonic wave broken rock and thermal energy broken rock etc., rock breaking by water jet is to the technique for wanting summation device of nozzle
It is it is required that high；The limitation of laser drill broken rock stimulated light device power, at present also in the laboratory exploratory stage；Ultrasonic wave broken rock uses
When have very much limitation, it is desirable that rock is brittle.Rock breaking by water jet, laser drill broken rock, ultrasonic wave broken rock etc. are still in experiment
Qualify Phase need further to verify for the feasibility in drilling well.
Plasma broken rock can be divided into liquid electricity broken rock and electric pulse crushes, and discharge plasma is generated in liquid medium, rock
The major impetus of stone broken rock comes from electric discharge generation shock wave, bubble is crumbled and fall claims liquid electric with mechanical forces, this effects such as pressure waves
Broken rock；Discharge plasma occurs mainly in rock interior, and the power of catalase produces when coming from plasma channel expansion
Raw stress, this breaking method are known as electricity and crush, i.e. EPB broken rocks.Electrohydraulic effect is broken for indirect broken rock；Electricity is broken for directly
Broken rock, it is more preferable with crushing effect electric under power；Electric pulse spread speed in rock is faster than in water, and electric pulse crushing efficiency is more
It is high；Electrohydraulic effect break down solids are based on compression failure, and the tensile stress formed in electric shattering process makes rock more broken；
Electric reduction ratio electrohydraulic effect comminution energy conssumption is low.EPB drillings confirm its feasibility by many countries, and (electric pulse bores EPB
Into) have many advantages, such as that efficiency of breaking rock is high, wall quality is high, it is most potential so far, closest to industrialized broken rock side
Formula.Rotary drilling expense is ramped with the increase of depth, is more than 5000m in drilling depth, drilling expense is more than 2000
Euro/m, more than 8000m, drilling expense is more than 30000 euro/m, and EPB drillings are not limited by drilling depth, and drilling expense is about
For 100 euro/m.
Invention content
The purpose of the present invention is design a kind of multi-pair electrodes high-voltage electricity that efficiency of breaking rock is high, wall quality is high to crush brill
Head and electric crushing experiment device, realize the rock under simulated high-pressure environment, carry out electric pulse and crush drilling experiment.
Wherein aspect according to the present invention, the present invention provide a kind of multi-pair electrodes electricity and crush to solve its technical problem
Drill bit including insulation tube, is arranged with bit arm outer tube on insulation tube, insulation tube is hollow, it is described it is hollow in be disposed with cable, it is described
Cable is electrically connected multiple high-low pressure electrodes pair positioned at the electric pulse broken rock drill bit lower end, and from the insulation tube
Upper end is pierced by, and the lower end of the electric pulse broken rock drill bit also has collets, and high-low pressure electrode is to may be contained on collets, absolutely
Edge block is located at the multi-pair electrodes electricity and crushes on the lower end of drill bit, by bit arm outer tube with each high-low pressure electrode to keeping apart.
Preferably, in the multi-pair electrodes electricity of the present invention crushes drill bit, the high-low pressure electrode is to including a dead ring, edge
The axial direction of the dead ring is provided with multiple metal spokes, and each metal spoke is oppositely arranged along the annular of dead ring, opposite
Two metal spokes one of setting access cathode from cable access anode, one.
Preferably, in the multi-pair electrodes electricity of the present invention crushes drill bit, have on the upper end of the electric pulse broken rock drill bit
Lifting lug.
According to another aspect of the present invention, the present invention additionally provides a kind of electric crushing experiment dress to solve its technical problem
It puts, including：
Multi-pair electrodes electricity such as any of the above-described crushes drill bit；
Rope guide；
Steel wire rope connects the multi-pair electrodes electricity and crushes drill bit, and drill bit is crushed to promote and transfer the multi-pair electrodes electricity；
The cable that guide roller, the steel wire rope and the multi-pair electrodes electricity crush drill bit connects after being oriented to roller guide
To the rope guide；
The pulse power, for output electric pulse, electric pulse rising time is 50ns-500ns, and the pulse power is electrical
The cable is connected, there is the cable of multichannel respectively with each high-low pressure electrode to being connected；
Confining pressure cylinder component, including confining pressure cylinder, ionization aqueous drilling fluid, rock sample, confining pressure cylinder is provided for the rock sample
Confining pressure, ionization aqueous drilling fluid provide dielectric, and carry between the high-field electrode and low-field electrode of the high-low pressure electrode pair
Make fragmentary debris worn out because of walking；
Hydraulic power unit connects the confining pressure cylinder component, and hydraulic pressure is provided for the confining pressure cylinder；
Water pump is passed in and out, connects the confining pressure cylinder component, to realize the cycle of the ionization aqueous medium；
Control device, for controlling the start and stop of the hydraulic power unit, the disengaging water pump and the rope guide.
Preferably, it in the multi-pair electrodes electricity of the present invention crushes drill bit, further includes：
Experimental provision aluminium section bar stent, is used to support the hydraulic power unit and the multi-pair electrodes electricity crushes drill bit, described
Rope guide is mounted on the experimental provision aluminium section bar stent, realizes the decentralization and recycling of steel wire rope and cable.
Preferably, in the electric crushing experiment device of the present invention, the pulse power includes obtaining after power frequency electric is boosted
Power frequency supply, two silicon stack rectifiers, multichannel electric spark switch, storage capacitor and the height voltage cable pair arrived；The boosting
There are two output terminal, the one of silicon stack rectifiers of one of output terminal connection of power frequency supply for the power frequency supply tool obtained afterwards
Anode, another silicon stack rectifier, storage capacitor are connected in parallel on the cathode and power frequency electric of one of silicon stack rectifier
Between another output terminal in source, the cathode of one of silicon stack rectifier connects with another described silicon stack rectifier cathode
It connects, each channel of multichannel electric spark switch：Each channel connects a height voltage cable to rear and be connected in the storage respectively
The both ends of energy capacitance, each height voltage cable is to being electrically connected the cable.
Preferably, in the electric crushing experiment device of the present invention, during drilling, the multi-pair electrodes electricity crushes the height of drill bit
Piezoelectricity extremely pair is contacted with rock contact to be point-face.
Preferably, in the electric crushing experiment device of the present invention, multi-pair electrodes high-voltage electricity crushes drill bit using more high-low pressures
Electrode is broken to discharging.
Multi-pair electrodes electricity is crushed drill bit and is powered using the pulse power, and the pulse power is switched with multichannel electric spark, can be defeated
Go out the pulse of multichannel, by cable transmission to high low-field electrode pair, realize multiple-pulse electric discharge simultaneously, catalase drilling efficiency
Height, and it is high using electric pulse broken rock wall quality；Multi-pair electrodes high-voltage electricity crushes the high-low pressure electrode pair and rock contact of drill bit
For point-face contact, the waste of energy can be greatly reduced, energy loss is small；Multi-pair electrodes electricity crushes drill bit using more height piezoelectricity
It is extremely broken to discharging, since discharge voltage height causes the ablation of electrode insulation block when avoiding single high-low pressure electrode to electric discharge, drop
The low requirement to insulating bulk material.Electric crushing experiment device can carry out electric pulse and crush drilling experiment, can simulate earth interior height
Pressure ring border, thus to researchs such as the rock-cracking mechanisms of bit electrode, insulating materials, drilling parameter and multiple physical field, and can be real
Existing steel wire rope and cable synchronizing, have the characteristics that simple in structure, reliability is high.
A kind of multi-pair electrodes electricity of the present invention crushes drill bit and electric crushing experiment device has the following advantages that：
(1) multi-pair electrodes electricity crushes drill bit using more high-low pressure electrodes pair, and catalase drilling efficiency is high；
(2) multi-pair electrodes electricity is crushed drill bit and is crept into using electric pulse broken rock, and wall quality is high；
(3) multi-pair electrodes electricity crushes drill bit high-low pressure electrode pair and is contacted with rock contact to be point-face, and energy loss is low；
(4) multi-pair electrodes electricity crushes drill bit to crush drill bit compared to single electrode electricity to insulating bulk material requirement low；
(5) electric crushing experiment device can simulate earth interior hyperbaric environment, can carry out more electric pulses and crush the more influences of drilling
Factor Experiment is analyzed.
Description of the drawings
A kind of multi-pair electrodes electricity that Fig. 1 is the present invention crushes drill bit and electric crushing experiment assembly axis geodesic structure figure；
A kind of multi-pair electrodes electricity that Fig. 2 is the present invention crushes drill bit and electric crushing experiment device facing structure figure；
The multi-pair electrodes electricity that Fig. 3 is the present invention crushes bit exterior structure chart；
The multi-pair electrodes electricity that Fig. 4 is the present invention crushes drill bit internal structure chart；
The multi-pair electrodes electricity that Fig. 5 is the present invention crushes drill bit drilling structure diagram；
Fig. 6 is the pulse power equivalent circuit diagram of the present invention；
Fig. 7 is the structure diagram of the high-low pressure pulse pair of the present invention；
In above-mentioned figure：1-guide roller, 2-steel wire rope, 3-control device, 4-multi-pair electrodes electricity crush drill bit, 4.1-
Lifting lug, 4.2-bit arm outer tube, 4.3-collets, 4.4-high-low pressure electrode pair, 4.4.1-dead ring, 4.4.2-electrode,
4.5-insulation tube, 4.6-cable, 5-pulse power, 5.1-power frequency supply, 5.2-silicon stack rectifier, 5.3-energy storage electricity
Hold, 5.4-multichannel electric spark switch, 5.5-height voltage cable pair, 6-confining pressure cylinder component, 6.1-confining pressure cylinder, 6.2-electricity
From aqueous medium, 6.3-rock sample, 7-hydraulic power unit, 8-disengaging water pump, 9-experimental provision aluminium section bar stent, 10-row rope
Device.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific embodiment of the present invention.
Embodiment 1：A kind of multi-pair electrodes electricity of the present invention crushes drill bit and electric crushing experiment device, structure such as Fig. 1,2,3,
4th, shown in 5,6, electric crushing experiment device includes guide roller 1, steel wire rope 2, control device 3, multi-pair electrodes electricity and crushes drill bit 4, arteries and veins
Rush power supply 5, confining pressure cylinder component 6, hydraulic power unit 7, disengaging water pump 8, experimental provision aluminium section bar stent 9, rope guide 10, guide roller
1 is used to implement the guiding of steel wire rope 2 and cable 4.6, and steel wire rope 2 and cable 4.6 crush the work of 4 gravity of drill bit in multi-pair electrodes electricity
It is in tensioning state always under；Steel wire rope 2 crushes drill bit for promoting and transferring multi-pair electrodes electricity；Control device 3 is used to control
The start and stop of hydraulic power unit processed, disengaging water pump and rope guide；Multi-pair electrodes electricity crushes drill bit 4 and includes lifting lug 4.1, bit arm outer tube
4.2nd, collets 4.3, high-low pressure electrode when 5 output electric pulse of the pulse power, rise 4.4, insulation tube 4.5, cable 4.6
It is 50ns-500ns along the time, the cable 4.6 with multichannel is connected respectively with high-low pressure electrode to 4.4, when multichannel electrical fire
The flowers are in blossom closes 5.4 and opens, and high-low pressure electrode is to generating voltage between 4.4, since under the power pulse, the breakdown frequency of rock is less than
Ionize aqueous medium, high-low pressure electric field breakdown rock, the energy on rock interior generation plasma discharge channels, the pulse power
Amount is discharged into plasma discharge channels, and channel is heated.Plasma channel expanded by heating, and the rock mass of surrounding is done
Work(.When stress is more than the stress intensity of rock, catalase.Multi-pair electrodes electricity crushes drill bit 4 with multi-pair electrodes, can realize
Simultaneously along the different interface multiple discharge fractured rocks of rock, improve its efficiency of breaking rock, multi-pair electrodes electricity crush 4 electrode of drill bit with
For point contact, energy loss is small for contact between rock, insulation tube 4.5 for cable 4.6 and bit arm outer tube 4.2 it is completely insulated every
From preventing electromagnetic crosstalk of leaking electricity or occur, multi-pair electrodes discharge the ablation that can reduce to electrode insulation block 4.3 simultaneously, reduce pair
The requirement of 4.3 material of collets.
The pulse power 5 includes power frequency supply 5.1, two silicon stack rectifiers 5.2, multichannels for being obtained after power frequency electric is boosted
Electric spark switch 5.4, storage capacitor 5.3 and height voltage cable are to 5.5；There are two export for the power frequency supply tool obtained after boosting
End, one of output terminal of power frequency supply connect the anode of one of silicon stack rectifier 5.2, another silicon stack rectifier
5.2nd, storage capacitor 5.3 be connected in parallel on one of silicon stack rectifier 5.2 cathode and boosting after power frequency supply it is another
Between one output terminal, the cathode of one of silicon stack rectifier 5.2 connects with another described 5.2 cathode of silicon stack rectifier
It connects, each channel of multichannel electric spark switch 5.4：Each channel connects a height voltage cable to after 5.5 and being connected in respectively
The both ends of the storage capacitor, each height voltage cable is to being electrically connected the cable.220V/380V power frequency electrics are boosted
After obtain power frequency supply 5.1, power frequency supply obtains direct current after 5.2 rectification of silicon stack rectifier, and storage capacitor 5.3 is to direct current
It is stored, multichannel electric spark switch 5.4 disconnects, and the storage capacitor 5.3 in discharge loop charges, multichannel electric spark switch
5.4 are closed, and energy is injected into the extremely short time in load, realize single pulse electric discharge, when in multichannel electric spark switch 5.4
Multi-channel switch open simultaneously, then multi-pair electrodes electricity crushes 4 high-low pressure electrode of drill bit between 4.4 while discharges, realize simultaneously
Multi-section fractured rock.
Confining pressure cylinder component 6 includes confining pressure cylinder 6.1, rock sample 6.3, ionization aqueous medium 6.2, and confining pressure cylinder 6.1 provides most
Big confining pressure is 350MPa, can simulate the hyperbaric environment in earth 10km, and ionization aqueous medium 6.2 primarily serves high-low pressure electrode pair
4.4 insulation and the cycle cutting carring by ionizing aqueous medium 6.2.
Hydraulic power unit 7 provides hydraulic pressure for confining pressure cylinder 6.1.
Pass in and out the cycle that water pump 8 realizes ionization aqueous medium 6.2.
Experimental provision aluminium section bar stent 9 is used to support hydraulic power unit 7, multi-pair electrodes electricity crushes drill bit 4, uses aluminium section bar
It builds, it is simple in structure, it repeats and utilizes；
Rope guide 10 is mounted on experimental provision aluminium section bar stent, is realized the decentralization of steel wire rope 2 and cable 4.6 and is returned
It receives.
With reference to figure 7, the structure diagram of the high-low pressure pulse pair for the present invention, the high-low pressure electrode is to including one absolutely
Edge ring 4.4.1 is provided with multiple metal spoke 4.4.2 (figure only indicates a metal spoke) along the axial direction of dead ring 4.4.1,
Each metal spoke is oppositely arranged along the annular of dead ring, and two metal spokes one of opposite setting are accessed from the cable
Anode (+), an access cathode (-) are separated by a distance between the end of opposite two metal spokes.
When the multi-pair electrodes electricity of the present invention crushes the drilling of drill bit 4, the pulse power 5 is powered, and the pulse power 5 has multichannel electricity
Spark switch 5.4 can export the voltage pulse of multichannel, be transmitted to high-low pressure electrode to 4.4 by cable 4.6, output is mostly logical
Road electric pulse, rising time 50ns-500ns, under the power pulse, the breakdown frequency of rock is less than ionization aqueous medium,
High-low pressure electric field breakdown rock, plasma discharge channels are generated in rock interior, the energy on the pulse power is discharged into etc. from
In daughter discharge channel, and channel is heated.Plasma channel expanded by heating, and do work to the rock mass of surrounding.When stress is more than
During the stress intensity of rock, catalase realizes multi-section broken rock drilling, and drilling efficiency is high.
Embodiment 2：A kind of multi-pair electrodes electricity of the present invention crushes drill bit and electric crushing experiment device, structure and embodiment 1
Identical, when carrying out the experiment of electric pulse broken rock, control device 3 controls hydraulic power unit 7 to 6.1 fuel feeding of confining pressure cylinder, to rock sample 6.3
Add confining pressure, control device 3 controls the decentralization steel wire rope 2 of rope guide 10 and cable 4.6, multi-pair electrodes electricity to crush drill bit 4 and decline, controls
The control of device 3 disengaging water pump 8 processed realizes that ionization aqueous medium 6.2 recycles in confining pressure cylinder component 6, when multi-pair electrodes electricity crushes drill bit
4 with rock sample 6.3 when contacting, and the pulse power 5 discharges, and carries out bit electrode, insulating materials, drilling parameter and multiple physical field
Rock-cracking mechanism etc. experimental study.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned specific embodiment is only schematical rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, present inventive concept and scope of the claimed protection are not being departed from, can also made very much
Form, these are belonged within the protection of the present invention.
Claims (8)
1. a kind of multi-pair electrodes electricity crushes drill bit, which is characterized in that including insulation tube, bit arm outer tube is arranged on insulation tube,
Insulation tube is hollow, it is described it is hollow in be disposed with cable, the cable is electrically connected under the electric pulse broken rock drill bit
Multiple high-low pressure electrodes pair at end, and be pierced by from the upper end of the insulation tube, the lower end of the electric pulse broken rock drill bit also has
Collets, to may be contained on collets, collets are located at the multi-pair electrodes electricity and crush on the lower end of drill bit high-low pressure electrode,
By bit arm outer tube with each high-low pressure electrode to keeping apart.
2. multi-pair electrodes electricity according to claim 1 crushes drill bit, which is characterized in that the high-low pressure electrode is to including one
Dead ring is provided with multiple metal spokes along the axial direction of the dead ring, and each metal spoke is set along the circular phase pair of dead ring
It puts, two metal spokes one of opposite setting access cathode from cable access anode, one.
3. multi-pair electrodes electricity according to claim 1 crushes drill bit, which is characterized in that the electric pulse broken rock drill bit it is upper
There is lifting lug on end.
4. a kind of electricity crushing experiment device, which is characterized in that including：
As claim 1-3 any one of them multi-pair electrodes electricity crushes drill bit；
Rope guide；
Steel wire rope connects the multi-pair electrodes electricity and crushes drill bit, and drill bit is crushed to promote and transfer the multi-pair electrodes electricity；
The cable that guide roller, the steel wire rope and the multi-pair electrodes electricity crush drill bit is connected to institute after being oriented to roller guide
State rope guide；
The pulse power, for output electric pulse, electric pulse rising time is 50ns-500ns, and the pulse power is electrically connected
The cable has the cable of multichannel respectively with each high-low pressure electrode to being connected；
Confining pressure cylinder component, including confining pressure cylinder, ionization aqueous drilling fluid, rock sample, confining pressure cylinder provides confining pressure for the rock sample,
Ionization aqueous drilling fluid provides dielectric, and carry away broken between the high-field electrode and low-field electrode of the high-low pressure electrode pair
Landwaste；
Hydraulic power unit connects the confining pressure cylinder component, and hydraulic pressure is provided for the confining pressure cylinder；
Water pump is passed in and out, connects the confining pressure cylinder component, to realize the cycle of the ionization aqueous medium；
Control device, for controlling the start and stop of the hydraulic power unit, the disengaging water pump and the rope guide.
5. electricity crushing experiment device according to claim 4, which is characterized in that further include：
Experimental provision aluminium section bar stent, is used to support the hydraulic power unit and the multi-pair electrodes electricity crushes drill bit, row's rope
Device is mounted on the experimental provision aluminium section bar stent, realizes the decentralization and recycling of steel wire rope and cable.
6. electricity crushing experiment device according to claim 4, which is characterized in that the pulse power is passed through including power frequency electric
Power frequency supply, two silicon stack rectifiers, multichannel electric spark switch, storage capacitor and the height voltage cable pair obtained after boosting；
For the power frequency supply tool obtained after the boosting there are two output terminal, one of output terminal of the power frequency supply after boosting connects it
In a silicon stack rectifier anode, another silicon stack rectifier, storage capacitor are connected in parallel on one of silicon stack rectification
Between the cathode of device and another output terminal of power frequency supply, cathode and another described silicon of one of silicon stack rectifier
Heap rectifier cathode connects, each channel of multichannel electric spark switch：Each channel is connected a height voltage cable pair respectively
Afterwards and the both ends of the storage capacitor are connected in, each height voltage cable is to being electrically connected the cable.
7. electricity crushing experiment device according to claim 4, which is characterized in that during drilling, the multi-pair electrodes electricity crushes
The high-low pressure electrode pair of drill bit is contacted with rock sample to be contacted to be point-face.
8. electricity crushing experiment device according to claim 4, which is characterized in that it is how high that multi-pair electrodes electricity crushes drill bit use
Low-field electrode is broken to discharging.
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| CN201810057146.8A CN108222839B (en) | 2018-01-22 | 2018-01-22 | Multi-electrode pair electrode crushing drill bit and electrode crushing experimental device |
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| CN201810057146.8A CN108222839B (en) | 2018-01-22 | 2018-01-22 | Multi-electrode pair electrode crushing drill bit and electrode crushing experimental device |
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| CN108222839B CN108222839B (en) | 2023-08-25 |
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| CN109372514A (en) * | 2018-11-12 | 2019-02-22 | 中铁工程装备集团有限公司 | Based on high pressure pulse discharge-mechanically combining broken rock novel silo drilling machine |
| CN109630020A (en) * | 2019-01-11 | 2019-04-16 | 中国石油大学(华东) | Multichannel high-low pressure composite plasma boring method |
| CN109736710A (en) * | 2019-01-09 | 2019-05-10 | 中国石油大学(华东) | Multichannel high-low pressure composite plasma broken rock drill bit |
| CN109877975A (en) * | 2019-03-17 | 2019-06-14 | 东北石油大学 | A kind of dipulse plasma broken rock generating device |
| CN110656879A (en) * | 2019-09-30 | 2020-01-07 | 中国铁建重工集团股份有限公司 | Electric pulse drill bit |
| CN112198071A (en) * | 2020-10-20 | 2021-01-08 | 东北石油大学 | Electric pulse rock breaking experimental device capable of testing temperature stress of rock |
| CN112282642A (en) * | 2020-12-02 | 2021-01-29 | 大庆石油管理局有限公司 | Impact voltage rock breaking drill bit for improving mechanical drilling speed of hard formation |
| CN113389487A (en) * | 2021-06-09 | 2021-09-14 | 中国石油大学(华东) | Low-loss method for plasma rock breaking drill bit electrode |
| CN113899537A (en) * | 2021-09-09 | 2022-01-07 | 西南石油大学 | Rock breaking drilling experimental device and method for electric pulse-mechanical composite drill bit |
| CN114217662A (en) * | 2021-11-23 | 2022-03-22 | 华中科技大学 | Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology |
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