CN108222839B - Multi-electrode pair electrode crushing drill bit and electrode crushing experimental device - Google Patents
Multi-electrode pair electrode crushing drill bit and electrode crushing experimental device Download PDFInfo
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- CN108222839B CN108222839B CN201810057146.8A CN201810057146A CN108222839B CN 108222839 B CN108222839 B CN 108222839B CN 201810057146 A CN201810057146 A CN 201810057146A CN 108222839 B CN108222839 B CN 108222839B
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- 239000011435 rock Substances 0.000 claims abstract description 82
- 238000005553 drilling Methods 0.000 claims abstract description 43
- 238000002474 experimental method Methods 0.000 claims abstract description 8
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000010892 electric spark Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 2
- 238000003556 assay Methods 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- -1 drilling parameters Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Physics & Mathematics (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention relates to a multi-electrode pair electric crushing drill bit and an electric crushing experimental device, which adopt electric pulse to supply power, the rising edge time of an output pulse power supply is 50ns-500ns, plasma channels are generated by breakdown in rock, the rock is crushed electrically, the drill bit is provided with a plurality of electrode pairs, and the contact between the electrodes and the rock is point contact, so that the electric crushing drill bit has the characteristics of high rock crushing efficiency and low crushing energy consumption; the electric crushing experimental device can simulate the rock in a high-pressure environment, performs electric pulse crushing drilling experiments, researches drill bit electrodes, insulating materials, drilling parameters, a rock crushing mechanism 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 potential and nearly industrialized rock breaking drilling mode so far.
Description
Technical Field
The invention relates to the field of drilling, in particular to a multi-electrode crushing drill bit and an electrode crushing experimental device.
Background
The field of exploration, development and drilling of petroleum, natural gas and the like is continuously expanded, the research of the efficient rock breaking drilling technology is imperative, and the drilling efficiency is improved. The traditional mechanical drilling has the defects of low drilling efficiency, high drilling cost and the like when drilling deep holes and ultra-deep holes with high temperature and high pressure. The non-mechanical rock breaking mode at the front edge mainly comprises the following steps: water jet rock breaking, particle jet rock breaking, laser drilling rock breaking, plasma rock breaking, ultrasonic rock breaking, thermal energy rock breaking and the like, wherein the water jet rock breaking has high requirements on nozzles and equipment; laser drilling rock breaking is limited by laser power and is still in a laboratory exploration stage at present; the ultrasonic rock breaking has a limit in use, and the rock is required to be brittle. Water jet rock breaking, laser drilling rock breaking, ultrasonic rock breaking and the like are still in experimental verification stages, and feasibility in drilling is still to be further verified.
The plasma rock breaking can be divided into electrohydraulic rock breaking and electric pulse breaking, and when the discharge plasma is generated in a liquid medium, the main power of rock breaking is from the mechanical forces such as shock waves, bubble collapse, pressure waves and the like generated by discharge, and the effect is called electrohydraulic rock breaking; the discharge plasma mainly occurs inside the rock, and the power of rock breaking comes from the stress generated when the plasma channel expands, and this breaking method is called electric breaking, i.e. EPB breaking. Crushing the electrohydraulic effect into indirect rock breaking; the electric crushing is direct rock breaking, and the electric crushing effect is better under the same power; the propagation speed of the electric pulse in the rock is faster than that in the water, and the crushing efficiency of the electric pulse is higher; the solid crushed by the liquid-electric effect is mainly compression-broken, and the rock is easier to crush due to tensile stress formed in the electric crushing process; the electric crushing energy consumption is lower than that of the hydro-electric effect crushing. EPB drilling has been proved to be feasible by a plurality of countries, and EPB (electric pulse drilling) has the advantages of high rock breaking efficiency, high wall quality and the like, and is the most potential and most approximate to an industrialized rock breaking mode so far. The rotary drilling cost rises along with the increase of the depth, the drilling cost exceeds 2000 @ m/m and 8000m at the drilling depth, the drilling cost exceeds 30000 @ m, the EPB drilling is not limited by the drilling depth, and the drilling cost is about 100 @ m.
Disclosure of Invention
The invention aims to design a multi-electrode pair high-voltage electric crushing drill bit with high rock crushing efficiency and high well wall quality and an electric crushing experimental device, so that rock in a high-pressure environment is simulated, and an electric pulse crushing drilling experiment is carried out.
According to the technical problem, the invention provides a multi-electrode pair electric crushing drill bit, which comprises an insulating tube, wherein a drill bit arm outer tube is sleeved on the insulating tube, the insulating tube is hollow, cables are arranged in the hollow, the cables are respectively and electrically connected with a plurality of high-low voltage electrode pairs at the lower end of the electric pulse rock crushing drill bit and penetrate out of the upper end of the insulating tube, the lower end of the electric pulse rock crushing drill bit is also provided with an insulating block, the high-low voltage electrode pairs are all arranged on the insulating block, the insulating block is positioned at the lower end of the multi-electrode pair electric crushing drill bit, and the drill bit arm outer tube is isolated from each high-low voltage electrode pair.
Preferably, in the multi-electrode crushing drill of the present invention, the high-low voltage electrode pair includes an insulating ring, a plurality of metal spokes are disposed along an axial direction of the insulating ring, each metal spoke is disposed opposite to each other along an annular shape of the insulating ring, and two metal spokes disposed opposite to each other are connected to the positive electrode and the negative electrode from the cable.
Preferably, in the multi-electrode electro-mechanical breaking drill bit of the present invention, the upper end of the electro-pulse breaking drill bit is provided with a lifting lug.
According to another aspect of the present invention, in order to solve the technical problem, the present invention further provides an electric crushing experimental apparatus, including:
a multi-electrode electro-mechanical breaking bit as claimed in any one of the preceding claims;
rope arrangement device;
the steel wire rope is connected with the multi-electrode opposite-electrode crushing drill bit so as to lift and lower the multi-electrode opposite-electrode crushing drill bit;
the guide roller is used for guiding the cable of the multi-electrode crushing drill bit and then connecting the cable to the rope arranging device;
the pulse power supply is used for outputting electric pulses, the rising edge time of the electric pulses is 50ns-500ns, the pulse power supply is electrically connected with the cable, and the cable with multiple channels is respectively connected with each high-low voltage electrode pair;
the confining pressure cylinder assembly comprises a confining pressure cylinder, ionized water drilling fluid and a rock sample, wherein the confining pressure cylinder provides confining pressure for the rock sample, and the ionized water drilling fluid provides an insulating medium between a high-voltage electrode and a low-voltage electrode of the high-voltage electrode pair and carries away broken rock scraps;
the hydraulic pump station is communicated with the confining pressure cylinder assembly and provides hydraulic pressure for the confining pressure cylinder;
the water inlet and outlet pump is communicated with the confining pressure cylinder assembly to realize circulation of the ionized water medium;
and the control device is used for controlling the start and stop of the hydraulic pump station, the water inlet and outlet pump and the rope arrangement device.
Preferably, in the multi-electrode crushing drill of the present invention, further comprising:
the experimental device aluminum profile support is used for supporting the hydraulic pump station and the multi-electrode crushing drill bit, and the rope arrangement device is arranged on the experimental device aluminum profile support to realize the paying-off and recycling of the steel wire ropes and the cables.
Preferably, in the electric crushing experimental device, the pulse power supply comprises a power frequency power supply obtained by boosting power frequency power, two silicon stack rectifiers, a multichannel electric spark switch, an energy storage capacitor and a high-low voltage cable pair; the power frequency power supply obtained after boosting is provided with two output ends, one of the output ends of the power frequency power supply is connected with the anode of one of the silicon stack rectifiers, the other silicon stack rectifier and the energy storage capacitor are connected in parallel between the cathode of the one silicon stack rectifier and the other output end of the power frequency power supply, the cathode of the one silicon stack rectifier is connected with the cathode of the other silicon stack rectifier, and each channel of the multichannel electric spark switch is provided with: each channel is connected in series with a high-low voltage cable pair respectively and then connected to two ends of the energy storage capacitor, and each high-low voltage cable pair is electrically connected with the cable respectively.
Preferably, in the electric crushing experimental device, when drilling, the high-low voltage electrode pairs of the multi-electrode pair electric crushing drill bit are in point-surface contact with the rock.
Preferably, in the electric crushing experimental device, the multi-electrode high-voltage electric crushing drill bit adopts multi-high-voltage low-voltage electric crushing.
The multi-electrode crushing drill bit adopts a pulse power supply to supply power, the pulse power supply is provided with a multi-channel electric spark switch, multi-channel pulses can be output, the multi-channel pulses are transmitted to the high-low voltage electrode pair through a cable, simultaneous multi-pulse discharge is realized, the rock crushing drilling efficiency is high, and the wall quality of the rock crushing well adopting the electric pulses is high; the high-low voltage electrode pairs of the multi-electrode pair high-voltage electric crushing drill bit are in point-surface contact with rock, so that the energy waste can be greatly reduced, and the energy loss is small; the multi-electrode crushing drill bit adopts multi-high-low-voltage electrode to crush discharge, the ablation of the electrode insulating block caused by high discharge voltage when a single high-low voltage electrode pair discharges is avoided, and the requirement on the insulating block material is reduced. The electric crushing experimental device can perform electric pulse crushing drilling experiments, and can simulate the high-voltage environment in the earth, so that the research on drill bit electrodes, insulating materials, drilling parameters, rock crushing mechanisms of multiple physical fields and the like can be performed, the synchronization of a steel wire rope and a cable can be realized, and the electric crushing experimental device has the characteristics of simple structure, high reliability and the like.
The multi-electrode pair electricity crushing drill bit and the electricity crushing experimental device have the following advantages:
(1) The multi-electrode pair electrode crushing drill bit adopts a plurality of high-voltage and low-voltage electrode pairs, so that the rock crushing drilling efficiency is high;
(2) The multi-electrode breaking drill bit adopts electric pulse rock breaking drilling, and the well wall quality is high;
(3) The high-voltage electrode pair of the multi-electrode pair electrode crushing drill bit is in point-surface contact with rock, so that the energy loss is low;
(4) The requirements of the multi-electrode electric crushing drill bit on the insulating block materials are lower than those of the single-electrode electric crushing drill bit;
(5) The electric crushing experimental device can simulate the high-pressure environment in the earth, and can perform experimental analysis of multiple impact factors of multiple electric pulse crushing drilling.
Drawings
FIG. 1 is a diagram showing the axial structure of a multi-electrode crushing drill bit and an experimental device for electric crushing;
FIG. 2 is a front view of the structure of the multi-electrode crushing drill and the experimental device for electric crushing;
FIG. 3 is an external structural view of the multi-electrode crushing drill bit of the present invention;
FIG. 4 is a view showing the internal structure of the multi-electrode crushing drill bit according to the present invention;
FIG. 5 is a schematic view of the drilling structure of the multi-electrode crushing drill bit according to the present invention;
FIG. 6 is an equivalent circuit diagram of a pulse power supply according to the present invention;
FIG. 7 is a schematic diagram of the structure of the high and low voltage pulse pairs of the present invention;
in the above figures: the device comprises a 1-guide roller, a 2-wire rope, a 3-control device, a 4-multi-electrode pair electrode breaking drill bit, a 4.1-lifting lug, a 4.2-drill bit arm outer tube, a 4.3-insulating block, a 4.4-high-low voltage electrode pair, a 4.4.1-insulating ring, a 4.4.2-electrode, a 4.5-insulating tube, a 4.6-cable, a 5-pulse power supply, a 5.1-power frequency power supply, a 5.2-silicon stack rectifier, a 5.3-energy storage capacitor, a 5.4-multichannel electric spark switch, a 5.5-high-low voltage cable pair, a 6-confining pressure cylinder assembly, a 6.1-confining pressure cylinder, a 6.2-ionized water medium, a 6.3-rock sample, a 7-hydraulic pump station, an 8-inlet and outlet water pump, a 9-experimental device aluminum profile bracket and a 10-rope arranging device.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
Example 1: the invention relates to a multi-electrode pair electrode crushing drill bit and an electric crushing experimental device, the structures of which are shown in figures 1, 2, 3, 4, 5 and 6, wherein the electric crushing experimental device comprises a guide roller 1, a steel wire rope 2, a control device 3, a multi-electrode pair electrode crushing drill bit 4, a pulse power supply 5, a confining pressure cylinder component 6, a hydraulic pump station 7, a water inlet and outlet pump 8, an experimental device aluminum profile bracket 9 and a rope arrangement device 10, the guide roller 1 is used for realizing the guide of the steel wire rope 2 and a cable 4.6, and the steel wire rope 2 and the cable 4.6 are always in a tensioning state under the action of the gravity of the multi-electrode pair electrode crushing drill bit 4; the steel wire rope 2 is used for lifting and lowering the multi-electrode pair electrode crushing drill bit; the control device 3 is used for controlling the start and stop of the hydraulic pump station, the water inlet and outlet pump and the rope arrangement device; the multi-electrode pair electrode breaking drill bit 4 comprises a lifting lug 4.1, a drill bit arm outer tube 4.2, an insulating block 4.3, a high-low voltage electrode pair 4.4, an insulating tube 4.5 and a cable 4.6, when a pulse power supply 5 outputs electric pulses, the rising edge time is 50ns-500ns, the cable 4.6 with multiple channels is respectively connected with the high-low voltage electrode pair 4.4, when the multi-channel electric spark switch 5.4 is started, voltage is generated between the high-low voltage electrode pair 4.4, and due to the fact that the breakdown frequency of rock is smaller than that of ionized water medium under the power supply pulse, the high-low voltage electric field breaks down the rock, a plasma discharge channel is generated inside the rock, and energy on the pulse power supply is released into the plasma discharge channel and heats the channel. The plasma channel expands by heating and works on surrounding rock mass. When the stress exceeds the stress intensity of the rock, the rock breaks. The multi-electrode pair electrode crushing drill bit 4 is provided with a plurality of electrode pairs, can realize that the rock is crushed by multiple discharge along different interfaces of the rock, improves the rock crushing efficiency, has small energy loss because the contact between the electrodes of the multi-electrode pair electrode crushing drill bit 4 and the rock is point contact, is used for completely insulating and isolating a cable 4.6 and a drill bit arm outer tube 4.2, prevents electric leakage or electromagnetic crosstalk, reduces the ablation of an electrode insulating block 4.3 by the simultaneous discharge of the multi-electrode pairs, and reduces the requirement on the material of the insulating block 4.3.
The pulse power supply 5 comprises a power frequency power supply 5.1 obtained by boosting power frequency power, two silicon stack rectifiers 5.2, a multichannel electric spark switch 5.4, an energy storage capacitor 5.3 and a high-low voltage cable pair 5.5; the power frequency power supply obtained after boosting is provided with two output ends, one output end of the power frequency power supply is connected with the anode of one silicon stack rectifier 5.2, the other silicon stack rectifier 5.2 and the energy storage capacitor 5.3 are connected in parallel between the cathode of the one silicon stack rectifier 5.2 and the other output end of the power frequency power supply after boosting, the cathode of the one silicon stack rectifier 5.2 is connected with the cathode of the other silicon stack rectifier 5.2, and each channel of the multichannel electric spark switch 5.4 is provided with: each channel is connected in series with a high-low voltage cable pair for 5.5 times and then connected to two ends of the energy storage capacitor, and each high-low voltage cable pair is electrically connected with the cable respectively. The 220V/380V power frequency electricity is boosted to obtain a power frequency power supply 5.1, the power frequency power supply is rectified by a silicon stack rectifier 5.2 to obtain direct current, an energy storage capacitor 5.3 stores the direct current, a multi-channel electric spark switch 5.4 is opened, the energy storage capacitor 5.3 in a discharging loop is charged, the multi-channel electric spark switch 5.4 is closed, the energy is injected into a load in a very short time, single pulse discharging is realized, and when the multi-channel switch in the multi-channel electric spark switch 5.4 is simultaneously opened, the multi-electrode pair electrode breaking drill bit 4 discharges between a high-voltage electrode pair 4.4 simultaneously, so that simultaneous multi-section rock breaking is realized.
The confining pressure cylinder assembly 6 comprises a confining pressure cylinder 6.1, a rock sample 6.3 and an ionized water medium 6.2, wherein the maximum confining pressure provided by the confining pressure cylinder 6.1 is 350MPa, the high-pressure environment within 10km of the earth can be simulated, and the ionized water medium 6.2 mainly insulates a high-low voltage electrode pair 4.4 and carries rock debris through the circulation of the ionized water medium 6.2.
The hydraulic pump station 7 provides hydraulic pressure for the confining pressure cylinder 6.1.
The water inlet and outlet pump 8 realizes the circulation of the ionized water medium 6.2.
The experimental device aluminum profile bracket 9 is used for supporting the hydraulic pump station 7 and the multi-electrode pole electricity crushing drill bit 4, is built by adopting an aluminum profile, has a simple structure and can be recycled;
the rope arrangement device 10 is arranged on an experimental device aluminum profile bracket, so that the steel wire rope 2 and the cable 4.6 are released and recovered.
Referring to fig. 7, which is a schematic structural diagram of the high-low voltage pulse pair of the present invention, the high-low voltage pulse pair includes an insulating ring 4.4.1, a plurality of metal spokes 4.4.2 (only one metal spoke is shown in the drawing) are disposed along the axial direction of the insulating ring 4.4.1, each metal spoke is disposed opposite to the other metal spoke along the annular shape of the insulating ring, two opposite metal spokes are disposed, one of the two opposite metal spokes is connected to the positive electrode (+) and one of the two opposite metal spokes is connected to the negative electrode (-) from the cable, and a certain distance is provided between the ends of the two opposite metal spokes.
When the multi-electrode crushing drill bit 4 is used for drilling, the pulse power supply 5 supplies power, the pulse power supply 5 is provided with the multi-channel electric spark switch 5.4, multi-channel voltage pulses can be output and transmitted to the high-low voltage electrode pair 4.4 through the cable 4.6, the multi-channel electric pulses are output, the rising edge time of the multi-channel electric pulses is 50ns-500ns, the breakdown frequency of the rock is smaller than that of ionized water medium under the power supply pulse, the high-low voltage electric field breaks down the rock, a plasma discharge channel is generated in the rock, and the energy on the pulse power supply is released into the plasma discharge channel and heats the channel. The plasma channel expands by heating and works on surrounding rock mass. When the stress exceeds the stress intensity of the rock, the rock is broken, multi-section rock breaking drilling is realized, and the drilling efficiency is high.
Example 2: the structure of the multi-electrode pair electrode crushing drill bit and the electric crushing experimental device is the same as that of the embodiment 1, when an electric pulse rock crushing experiment is carried out, the control device 3 controls the hydraulic pump station 7 to supply oil to the confining pressure cylinder 6.1 and to supply confining pressure to the rock sample 6.3, the control device 3 controls the rope arrangement device 10 to lower the steel wire rope 2 and the cable 4.6, the multi-electrode pair electrode crushing drill bit 4 descends, the control device 3 controls the water inlet and outlet pump 8 to realize circulation of ionized water medium 6.2 in the confining pressure cylinder assembly 6, and when the multi-electrode pair electrode crushing drill bit 4 is contacted with the rock sample 6.3, the pulse power supply 5 discharges and experimental researches on drill bit electrodes, insulating materials, drilling parameters, rock crushing mechanisms of a plurality of physical fields and the like are carried out.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (5)
1. An electrical disruption assay device comprising:
the multi-electrode pair electrode crushing drill bit comprises an insulating tube, a drill bit arm outer tube is sleeved on the insulating tube, the insulating tube is hollow, cables are arranged in the hollow, the cables are respectively and electrically connected with a plurality of high-low voltage electrode pairs at the lower end of the electric pulse rock breaking drill bit and penetrate out of the upper end of the insulating tube, an insulating block is arranged at the lower end of the electric pulse rock breaking drill bit, the high-low voltage electrode pairs are all arranged on the insulating block, and the insulating block is positioned at the lower end of the multi-electrode pair electrode crushing drill bit and isolates the drill bit arm outer tube from each high-low voltage electrode pair;
rope arrangement device;
the steel wire rope is connected with the multi-electrode opposite-electrode crushing drill bit so as to lift and lower the multi-electrode opposite-electrode crushing drill bit;
the guide roller is used for guiding the cable of the multi-electrode crushing drill bit and then connecting the cable to the rope arranging device;
the pulse power supply is used for outputting electric pulses, the rising edge time of the electric pulses is 50ns-500ns, the pulse power supply is electrically connected with the cable, and the cable with multiple channels is respectively connected with each high-low voltage electrode pair; the pulse power supply comprises a power frequency power supply obtained by boosting power frequency power, two silicon stack rectifiers, a multichannel electric spark switch, an energy storage capacitor and a high-low voltage cable pair; the power frequency power supply obtained after boosting is provided with two output ends, one output end of the power frequency power supply after boosting is connected with the anode of one silicon stack rectifier, the other silicon stack rectifier and the energy storage capacitor are connected between the cathode of the one silicon stack rectifier and the other output end of the power frequency power supply in parallel, the cathode of the one silicon stack rectifier is connected with the cathode of the other silicon stack rectifier, and each channel of the multichannel electric spark switch is provided with: each channel is respectively connected with a high-low voltage cable pair in series and then connected with two ends of the energy storage capacitor, and each high-low voltage cable pair is respectively and electrically connected with the cable;
the confining pressure cylinder assembly comprises a confining pressure cylinder, ionized water drilling fluid and a rock sample, wherein the confining pressure cylinder provides confining pressure for the rock sample, and the ionized water drilling fluid provides an insulating medium between a high-voltage electrode and a low-voltage electrode of a high-voltage electrode pair and carries away broken rock scraps;
the hydraulic pump station is communicated with the confining pressure cylinder assembly and provides hydraulic pressure for the confining pressure cylinder;
the water inlet and outlet pump is communicated with the confining pressure cylinder assembly to realize circulation of ionized water medium;
the control device is used for controlling the start and stop of the hydraulic pump station, the water inlet and outlet pump and the rope arrangement device;
the experimental device aluminum profile support is used for supporting the hydraulic pump station and the multi-electrode crushing drill bit, and the rope arrangement device is arranged on the experimental device aluminum profile support to realize the paying-off and recycling of the steel wire ropes and the cables.
2. The electrical crushing experiment apparatus according to claim 1, wherein the pair of high and low voltage electrodes comprises an insulating ring, a plurality of metal spokes are arranged along the axial direction of the insulating ring, each metal spoke is arranged oppositely along the annular shape of the insulating ring, and two oppositely arranged metal spokes are connected with the anode and the cathode from the cable.
3. The electric crushing experiment device according to claim 1, wherein the electric pulse rock breaking drill bit is provided with a lifting lug at an upper end thereof.
4. The electrical fracturing experiment apparatus of claim 1, wherein the high and low voltage electrode pairs of the multi-electrode pair-wise electrical fracturing bit are in point-to-face contact with the rock sample while drilling.
5. The electrical crushing experiment device according to claim 1, wherein the multi-electrode-pair electrical crushing drill bit adopts multi-high-low-voltage electrode-pair discharge crushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN108222839A CN108222839A (en) | 2018-06-29 |
| CN108222839B true CN108222839B (en) | 2023-08-25 |
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| CN201810057146.8A Active CN108222839B (en) | 2018-01-22 | 2018-01-22 | Multi-electrode pair electrode crushing drill bit and electrode crushing experimental device |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109736710B (en) * | 2019-01-09 | 2020-12-25 | 中国石油大学(华东) | Multi-path high-low pressure composite plasma rock breaking drill bit |
| CN109630020B (en) * | 2019-01-11 | 2020-12-22 | 中国石油大学(华东) | Multi-path high-low pressure composite plasma drilling method |
| CN109877975B (en) * | 2019-03-17 | 2020-07-17 | 东北石油大学 | Double-pulse plasma rock breaking generation device |
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