CN110644929B - Electric pulse drill bit - Google Patents
Electric pulse drill bit Download PDFInfo
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- CN110644929B CN110644929B CN201910942570.5A CN201910942570A CN110644929B CN 110644929 B CN110644929 B CN 110644929B CN 201910942570 A CN201910942570 A CN 201910942570A CN 110644929 B CN110644929 B CN 110644929B
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- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 46
- 238000005553 drilling Methods 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000035939 shock Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
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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
- E21B11/00—Other drilling tools
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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
- E21B7/00—Special methods or apparatus for drilling
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Disintegrating Or Milling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses an electric pulse drill bit, comprising: the high-voltage electrode and the low-voltage electrode are respectively used for being connected with the electric pulse generator; the connecting rod is used for arranging the high-voltage electrode, and the high-voltage electrode is detachably connected with the connecting rod through an electrode joint so as to be convenient for replacing different high-voltage electrodes; the sleeve is used for arranging the low-voltage electrode, and the low-voltage electrode is detachably arranged on the sleeve so as to be convenient for replacing different low-voltage electrodes; and the insulating sleeve is arranged between the connecting rod and the sleeve and is used for insulating the high-voltage electrode and the low-voltage electrode. The electric pulse drill bit utilizes the mechanical effect of shock waves, jet flows or plasma channels generated by pulse discharge of the high-voltage electrode and the low-voltage electrode to break rocks, the drill bit does not need to rotate, and the drill bit is not easy to wear; the energy of pulse discharge is adopted for breaking rocks, the influence of external factors such as rock hardness is small, and the construction efficiency is high. And the electric pulse drill bit can adapt to different rock drilling and drilling requirements by replacing different high-voltage electrodes and low-voltage electrodes.
Description
Technical Field
The invention relates to the technical field of rock breaking and drilling devices, in particular to an electric pulse drill bit.
Background
The rock breaking method commonly used in the prior art is a mechanical rotation rock breaking method, that is, a drill bit is driven to rotate mechanically to contact with rock, and the purpose of rock breaking and drilling is achieved by cutting force generated when the drill bit rotates.
However, as the depth and the breadth of resource exploitation are deepened by human beings, geological conditions of rock breaking are increasingly complicated, for example, in the future acquisition of crude oil, natural gas and geothermal energy, unconventional wells such as deep wells or ultra-deep wells need to be drilled, so that the difficulty of rock breaking is gradually increased, in the rock breaking drilling process, the tunneling efficiency of a mechanical rock breaking working mode is often influenced by external factors such as rock hardness, and particularly under extreme conditions, not only is the tunneling speed extremely slow, but also the damage probability of a mechanical drill bit is greatly improved, the drill bit needs to be frequently replaced, the construction progress is further influenced, and the construction cost is also increased.
Therefore, it is an urgent need to solve the problem of the prior art to provide a drill bit with high construction efficiency and less damage to the drill bit.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an electric pulse drill which is highly efficient and not easily damaged.
In order to achieve the above purpose, the invention provides the following technical scheme:
an electric pulse drill bit comprising:
the high-voltage electrode and the low-voltage electrode are respectively used for being connected with the electric pulse generator;
the connecting rod is used for arranging the high-voltage electrode, and the high-voltage electrode is detachably connected with the connecting rod through an electrode joint so as to be convenient for replacing different high-voltage electrodes;
the sleeve is used for arranging the low-voltage electrode, and the low-voltage electrode is detachably arranged on the sleeve so as to be convenient for replacing different low-voltage electrodes;
and the insulating sleeve is arranged between the connecting rod and the sleeve and is used for insulating the high-voltage electrode and the low-voltage electrode.
Preferably, the high voltage electrode includes:
the central crushing clamping joint is connected with the electrode joint;
and the high-voltage electrode tentacles are arranged at the peripheral part of the central crushing and clamping joint.
Preferably, the electrode tab includes:
a first externally threaded post for threaded connection with the connecting rod;
and the connecting disc is connected with the first external threaded column and is used for being connected with the high-voltage electrode.
Preferably, the center crushing chucking head includes:
the second external thread column is in threaded connection with the connecting disc;
and the high-voltage electrode tentacle is clamped in a gap between the clamping plate and the connecting disc.
Preferably, a disc spring is arranged between the connecting disc and the connecting rod.
Preferably, the low-voltage electrode comprises a plurality of low-voltage electrode tentacles, and the sleeve is provided with a third threaded hole for being in threaded connection with the low-voltage electrode tentacles.
Preferably, the axes of all the high-voltage electrode tentacles and the axes of all the low-voltage electrode tentacles are arranged in a collinear manner, and all the high-voltage electrode tentacles and all the low-voltage electrode tentacles form an annular gap.
Preferably, the sleeve is electrically conductive, and the end of the sleeve remote from the low voltage electrode is provided with a screw for connecting a low voltage cable for connection to an electrical pulse generator.
Preferably, the connecting rod is electrically conductive, and one end of the connecting rod, which is far away from the high-voltage electrode, is connected with a high-voltage cable, and the high-voltage cable is used for being connected with an electric pulse generator.
Preferably, the insulation sleeve includes:
the first insulating sleeve is arranged between the connecting rod and the sleeve, and a third external threaded column is arranged at one end, far away from the high-voltage electrode, of the first insulating sleeve;
the second insulating sleeve is sleeved on the peripheral part of the first insulating sleeve, one end of the second insulating sleeve is abutted to one end, away from the low-voltage electrode, of the sleeve, the other end of the second insulating sleeve is pressed on the end part of the first insulating sleeve through an insulating nut in threaded connection with the third external threaded column, and an insulating flat gasket is arranged between the insulating nut and the second insulating sleeve.
When the electric pulse drill bit provided by the invention is used, the rock is crushed by using the mechanical effect of the shock wave, jet flow or plasma channel generated by the pulse discharge of the high-voltage electrode and the low-voltage electrode, and compared with the drill bit adopting mechanical rotary rock crushing in the prior art, the electric pulse drill bit can realize rock crushing without rotating, and the drill bit is not easy to wear; compared with the method for breaking rock by cutting force generated by the rotation of the drill bit, the electric pulse drill bit is less influenced by external factors such as rock hardness and the like, and can ensure the construction efficiency when drilling unconventional wells such as deep wells or ultra-deep wells and breaking rock under extreme conditions are difficult.
Furthermore, because the high-voltage electrode passes through the electrode joint and can dismantle with the connecting rod and be connected, the low-voltage electrode can be dismantled with the sleeve and be connected, consequently, can guarantee the dismantlement of high-voltage electrode and low-voltage electrode and change to can make different high-voltage electrode and low-voltage electrode cooperation through changing different high-voltage electrode and low-voltage electrode, with through nimble adjustment high-voltage electrode and low-voltage electrode, make the electric pulse drill bit adapt to different actual rock drilling and creep into the demand.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a cross-sectional view of an electrically pulsed drill bit according to an embodiment of the present invention;
FIG. 2 is a schematic view of the assembled high voltage electrode and electrode tab of FIG. 1;
fig. 3 is a schematic view of the assembled sleeve and low voltage electrode of fig. 1.
The reference numerals in fig. 1 to 3 are as follows:
1 is a high-voltage electrode, 11 is an electrode joint, 111 is a first external threaded column, 112 is a connecting disc, 12 is a center breaking clamping joint, 13 is a high-voltage electrode tentacle, 14 is a disc spring, 2 is a low-voltage electrode, 21 is a low-voltage electrode tentacle, 3 is a connecting rod, 31 is a fastening nut, 4 is a sleeve, 41 is a screw, 5 is an insulating sleeve, 51 is a first insulating sleeve, 52 is a second insulating sleeve, 53 is an insulating nut, and 54 is an insulating flat pad.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide an electric pulse drill bit which has high construction efficiency and is not easy to damage.
Referring to fig. 1-3, fig. 1 is a cross-sectional view of an electric pulse drill bit according to an embodiment of the present invention; FIG. 2 is a schematic view of the assembled high voltage electrode and electrode tab of FIG. 1; fig. 3 is a schematic view of the assembled sleeve and low voltage electrode of fig. 1.
The invention provides an electric pulse drill bit which comprises a high-voltage electrode 1, a low-voltage electrode 2, a connecting rod 3, a sleeve 4 and an insulating sleeve 5, wherein the high-voltage electrode 1 is arranged on the connecting rod 3, the low-voltage electrode 2 is arranged on the sleeve 4, and the insulating sleeve 5 is arranged between the connecting rod 3 and the sleeve 4.
Specifically, the high-voltage electrode 1 and the low-voltage electrode 2 are respectively used for being connected with the positive electrode and the negative electrode of the electric pulse generator, so that in the process of charging and discharging of the electric pulse generator, the rock is crushed by using mechanical effects of shock waves, jet flows or plasma channels generated by pulse discharging.
It can be understood that a certain gap is formed between the high-voltage electrode 1 and the low-voltage electrode 2, when the high-voltage electrode 1 and the low-voltage electrode 2 are used, the high-voltage electrode 1 and the low-voltage electrode 2 are respectively contacted with rock, under the action of the electric pulse generator, pulse discharge is generated between the high-voltage electrode 1 and the low-voltage electrode 2, the rock between the high-voltage electrode 1 and the low-voltage electrode 2 is cracked and broken, and the part outside the area between the high-voltage electrode 1 and the low-voltage electrode 2 cannot generate the electric pulse effect. Therefore, the person skilled in the art can realize the actual requirements of rock breaking and drilling by distributing the high voltage electrode 1 and the low voltage electrode 2 to have a proper distance between the two.
It should be noted that the specific structures and shapes of the high voltage electrode 1 and the low voltage electrode 2 and the relative position relationship between the high voltage electrode 1 and the low voltage electrode 2 are not limited in the present invention, as long as the actual rock breaking and drilling requirements can be met.
For example, the high-voltage electrode 1 may have a columnar structure, the low-voltage electrode 2 may have a circular ring structure provided on an outer peripheral portion of the high-voltage electrode 1, the outer peripheral portion of the columnar structure and an inner peripheral portion of the circular ring structure enclose a circular ring-shaped gap region, and pulse discharge between the high-voltage electrode 1 and the low-voltage electrode 2 breaks rocks in the circular ring-shaped gap region, thereby realizing rock breaking, drilling, and the like.
Of course, the high voltage electrode 1 and the low voltage electrode 2 may be fins which are arranged in a staggered manner and radially diverge, and the rock between any two fins is broken by the pulse discharge between any adjacent fins of the high voltage electrode 1 and fins of the low voltage electrode 2.
Of course, the high voltage electrode 1 and the low voltage electrode 2 may also be claw-shaped structures arranged in a staggered manner, that is, one low voltage electrode 2 claw is arranged between any two adjacent high voltage electrodes 1 claws.
Preferably, the high voltage electrode 1 and the low voltage electrode 2 are in a cylindrical shape, a flat shape, a claw shape, a crotch shape or a multi-branch shape, etc. suitable for point discharge.
The size of the gap between the high voltage electrode 1 and the low voltage electrode 2 can be set according to the actual rock drilling size and the drilling size.
The high voltage electrode 1 and the low voltage electrode 2 may be 4140 stainless steel electrodes, high strength carbon steel electrodes, or superalloy electrodes, etc., as long as they have high toughness and wear resistance.
Connecting rod 3 is used for setting up high voltage electrode 1, plays fixed and the effect that supports to high voltage electrode 1, considers the convenience that high voltage electrode 1 changed, and high voltage electrode 1 passes through electrode joint 11 can dismantle with connecting rod 3 and be connected to in change different high voltage electrode 1 according to actual demand.
The sleeve 4 is used for setting up the low voltage electrode 2, plays the effect fixed and that support to the low voltage electrode 2, considers the convenience that the low voltage electrode 2 was changed, and low voltage electrode 2 detachable locates on the sleeve 4 to change different low voltage electrode 2 according to actual demand.
The insulating sleeve 5 is arranged between the connecting rod 3 and the sleeve 4 and used for realizing the insulating isolation of the high-voltage electrode 1 and the low-voltage electrode 2, so that the high-voltage electrode 1 and the low-voltage electrode 2 can only carry out pulse discharge through the rock between the high-voltage electrode 1 and the low-voltage electrode 2 when in contact with the rock.
Therefore, when the electric pulse drill bit is used, the mechanical effect of the shock wave, the jet flow or the plasma channel generated by the pulse discharge of the high-voltage electrode 1 and the low-voltage electrode 2 is utilized to crush the rock, and compared with the drill bit adopting mechanical rotary rock crushing in the prior art, the electric pulse drill bit can realize rock crushing without rotating, and is not easy to wear; compared with the method for breaking rock by cutting force generated by the rotation of the drill bit, the electric pulse drill bit is less influenced by external factors such as rock hardness and the like, and can ensure the construction efficiency when drilling unconventional wells such as deep wells or ultra-deep wells and breaking rock under extreme conditions are difficult.
Further, because high voltage electrode 1 can dismantle with connecting rod 3 through electrode joint 11 and be connected, low voltage electrode 2 can dismantle with sleeve 4 and be connected, consequently, can guarantee the dismantlement of high voltage electrode 1 and low voltage electrode 2 and change to can make different high voltage electrode 1 and the cooperation of low voltage electrode 2 through changing different high voltage electrode 1 and low voltage electrode 2, with through nimble adjustment high voltage electrode 1 and low voltage electrode 2, make the electric pulse drill bit adapt to different actual rock drilling and creep into the demand.
In consideration of the realization of the specific structure of the high-voltage electrode 1, on the basis of the above embodiment, the high-voltage electrode 1 comprises a central crushing and clamping joint 12 and a plurality of high-voltage electrode tentacles 13, wherein the central crushing and clamping joint 12 is connected with the electrode joint 11 to realize the fixation of the high-voltage electrode 1 and the electrode joint 11; a plurality of high voltage electrode tentacles 13 are provided on the outer periphery of the center crush-chucking joint 12.
It should be noted that the center breaking bit 12 is used for breaking rocks at the center, a plurality of high voltage electrode tentacles 13 are used for breaking rocks near the center, and preferably, the plurality of high voltage electrode tentacles 13 are uniformly distributed along the circumferential direction of the outer peripheral portion of the center breaking bit 12. That is, in this embodiment, the central crushing and clamping joint 12 and the plurality of high-voltage electrode tentacles 13 together form the high-voltage electrode 1, so as to cooperate with the low-voltage electrode 2 to realize the pulse discharge rock breaking.
It is understood that the present embodiment can form different high voltage electrodes 1 by providing different numbers, different shapes and different distributions of high voltage electrode tentacles 13 at the outer circumferential portion of the center crush-chucking joint 12.
In consideration of the specific structure of the electrode tab 11, on the basis of the above-described embodiment, the electrode tab 11 includes the first externally threaded stud 111 and the connection pad 112 connected to the first externally threaded stud 111, the first externally threaded stud 111 is used for being screwed with the tie bar 3, and the connection pad 112 is used for being connected to the high voltage electrode 1, so that the detachable connection of the high voltage electrode 1 to the tie bar 3 can be achieved.
Specifically, the connecting rod 3 is provided with a first threaded hole for being in threaded fit connection with the first externally threaded column 111, and the detachable connection of the electrode joint 11 and the connecting rod 3 is realized through the threaded fit connection of the first externally threaded column 111 and the first threaded hole. Therefore, when replacing the high voltage electrode 1, the first externally threaded stud 111 of the electrode tab 11 only needs to be screwed out of the first threaded hole of the connecting rod 3.
The connecting disc 112 is connected to the first externally threaded stud 111, the connecting disc 112 and the first externally threaded stud 111 may be an integrally formed structure, or may be two separate structures fixedly connected to each other, and preferably, the connecting disc 112 and the first externally threaded stud 111 form a T-shaped structure.
In consideration of the convenience of replacement of the high-voltage electrode 1, on the basis of the above embodiment, the center crushing clamp joint 12 includes the second externally threaded column and the clamping plate fixedly disposed on the outer peripheral portion of the second externally threaded column, and the high-voltage electrode tentacle 13 is clamped in the gap between the clamping plate and the connecting plate 112.
Specifically, the second external thread column is in threaded connection with the connection pad 112, that is, the connection pad 112 is provided with a second threaded hole for being in threaded fit connection with the second external thread column, so that the second external thread column is in threaded fit connection with the second threaded hole, the detachable connection of the high-voltage electrode 1 and the electrode connector 11 is realized, and therefore when the high-voltage electrode 1 is replaced, only the second external thread column of the high-voltage electrode 1 needs to be screwed out of the second threaded hole in the connection pad 112.
It can be understood that, through adjusting the length of second external thread post and connection pad 112 threaded connection, can adjust the clearance between cardboard and the connection pad 112 to can realize the nimble dismantlement of high voltage electrode tentacle 13, and then can realize the adjustment of high voltage electrode 1 and low voltage electrode 2 interval through replacing different structures and number high voltage electrode tentacle 13. For example, the high voltage electrode feeler 13 having a different angle from the center-breaking clamping joint 12 can be replaced to adjust the distance between the high voltage electrode 1 and the low voltage electrode 2.
In order to make the high voltage electrode 1 contact with the rock sufficiently, a disc spring 14 is provided between the connecting disc 112 and the connecting rod 3 in each of the above embodiments.
It can be understood that the embodiment realizes the flexible contact of the high-voltage electrode tentacle 13 and the rock by arranging the disc spring 14 between the connecting disc 112 and the connecting rod 3, so that the high-voltage electrode tentacle 13 is better pressed to the rock.
It should be noted that, the specific number of the disc springs 14 is not limited in the present invention, and the number of the disc springs 14 may be one or at least two.
On the basis of the above embodiments, the low-voltage electrode 2 includes a plurality of low-voltage electrode tentacles 21, and the sleeve 4 is provided with a third threaded hole for threaded connection with the low-voltage electrode tentacles 21.
That is to say, each low voltage electrode tentacle 21's one end in this embodiment all is equipped with the external screw thread, directly carries out screw-thread fit through the external screw thread and is connected with the third screw hole, realizes dismantling of low voltage electrode tentacle 21 and sleeve 4 and is connected to can adjust the nimble figure and the shape of low voltage electrode tentacle 21 as required.
In consideration of the distribution of the high-voltage electrode tentacles 13 and the low-voltage electrode tentacles 21, as a preferable scheme, on the basis of the above-described embodiment, the axes of the distribution of all the high-voltage electrode tentacles 13 and the axes of the distribution of all the low-voltage electrode tentacles 21 are arranged in a collinear manner, and all the high-voltage electrode tentacles 13 and all the low-voltage electrode tentacles 21 form an annular gap.
That is, in the present embodiment, all the high voltage electrode tentacles 13 and all the low voltage electrode tentacles 21 form a plurality of pairs of high and low voltage electrodes 2 so that rocks located between the high voltage electrode tentacles 13 and the low voltage electrode tentacles 21 are sufficiently crushed.
In view of the ease of connection of the low voltage electrode 2 to the electrical pulse generator, on the basis of the above described embodiment, the sleeve 4 is electrically conductive, the end of the sleeve 4 remote from the low voltage electrode 2 being provided with a screw 41 for connection to a low voltage cable for connection to the electrical pulse generator.
That is, the present embodiment finally achieves the connection of the low voltage electrode 2 and the low voltage cable by arranging the sleeve 4 as a conductive member and connecting the sleeve 4 and the low voltage cable by the screw 41, thereby avoiding the cable passage for laying the low voltage cable inside the sleeve 4.
In view of the convenience of connecting the high voltage electrode 1 to the electrical pulse generator, on the basis of the above-described embodiment, the connecting rod 3 may be electrically conductive, and the end of the connecting rod 3 remote from the high voltage electrode 1 is connected to a high voltage cable for connection to the electrical pulse generator.
That is, in the present embodiment, by setting the connecting rod 3 as a conductive piece, the connection between the connecting rod 3 and the high-voltage cable is finally achieved, and the cable channel for laying the high-voltage cable is avoided from being opened on the connecting rod 3.
In consideration of the specific structure and assembly requirements of the insulating sleeve 5, on the basis of the above embodiments, the insulating sleeve 5 includes a first insulating sleeve 51 and a second insulating sleeve 52, the first insulating sleeve 51 is disposed between the connecting rod 3 and the sleeve 4, the second insulating sleeve 52 is sleeved on the outer peripheral portion of the first insulating sleeve 51, one end of the second insulating sleeve 52 abuts against one end of the sleeve 4 away from the low-voltage electrode 2, one end of the first insulating sleeve 51 away from the high-voltage electrode 1 is provided with a third externally threaded column, the other end of the second insulating sleeve 52 is pressed on the end portion of the first insulating sleeve 51 through an insulating nut 53 in threaded connection with the third externally threaded column, and an insulating flat gasket 54 is disposed between the insulating nut 53 and the second insulating sleeve 52.
Further, an external thread is provided at an end of the tie rod 3 away from the high-voltage cable, and a fastening nut 31 fitted with the external thread is used to fix the first insulating sleeve 51 to the tie rod 3.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The electric pulse drill provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. An electric pulse drill bit, comprising:
a high voltage electrode (1) and a low voltage electrode (2) which are respectively connected with the electric pulse generator;
the connecting rod (3) is used for arranging the high-voltage electrode (1), and the high-voltage electrode (1) is detachably connected with the connecting rod (3) through an electrode joint (11) so as to be convenient for replacing different high-voltage electrodes (1);
the sleeve (4) is used for arranging the low-voltage electrode (2), and the low-voltage electrode (2) is detachably arranged on the sleeve (4) so as to be convenient for replacing different low-voltage electrodes (2);
an insulating sleeve (5) arranged between the connecting rod (3) and the sleeve (4) and used for insulating the high-voltage electrode (1) and the low-voltage electrode (2);
wherein the high voltage electrode (1) comprises:
a center crushing and clamping joint (12) connected with the electrode joint (11);
a plurality of high-voltage electrode tentacles (13) arranged on the periphery of the central crushing and clamping joint (12);
the electrode joint (11) comprises:
a first externally threaded stud (111) for threaded connection with the connecting rod (3);
a connecting disc (112) connected with the first externally threaded column (111) and used for being connected with the high-voltage electrode (1);
the center crushing chucking joint (12) includes:
a second externally threaded post threadedly coupled to the coupling disc (112);
and the high-voltage electrode tentacle (13) is clamped in a gap between the clamping plate and the connecting disc (112).
2. Electric pulse drill according to claim 1, characterized in that a disc spring (14) is provided between the connection disc (112) and the connection rod (3).
3. The electric pulse drill bit according to claim 1 or 2, characterized in that the low voltage electrode (2) comprises several low voltage electrode tentacles (21), the sleeve (4) being provided with a third threaded hole for a threaded connection with the low voltage electrode tentacles (21).
4. An electric pulse drill according to claim 3, characterized in that the axes of all the high voltage electrode tentacles (13) are arranged in line with the axes of all the low voltage electrode tentacles (21), all the high voltage electrode tentacles (13) and all the low voltage electrode tentacles (21) forming an annular gap.
5. An electric pulse drill according to claim 3, characterized in that the sleeve (4) is electrically conductive, and that the end of the sleeve (4) remote from the low voltage electrode (2) is provided with a screw (41) for connection to a low voltage cable for connection to an electric pulse generator.
6. An electric pulse drill bit according to claim 5, characterized in that the connecting rod (3) is electrically conductive, and that the end of the connecting rod (3) remote from the high voltage electrode (1) is connected to a high voltage cable for connection to an electric pulse generator.
7. An electric pulse drill bit according to claim 3, characterized in that the insulating sleeve (5) comprises:
a first insulating sleeve (51) arranged between the connecting rod (3) and the sleeve (4), wherein a third external threaded column is arranged at one end, far away from the high-voltage electrode (1), of the first insulating sleeve (51);
the second insulating sleeve (52) is sleeved on the periphery of the first insulating sleeve (51), one end of the second insulating sleeve (52) is abutted to one end, far away from the low-voltage electrode (2), of the sleeve (4), the other end of the second insulating sleeve (52) is pressed on the end portion of the first insulating sleeve (51) through an insulating nut (53) in threaded connection with the third external threaded column, and an insulating flat gasket (54) is arranged between the insulating nut (53) and the second insulating sleeve (52).
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| CN201910942570.5A CN110644929B (en) | 2019-09-30 | 2019-09-30 | Electric pulse drill bit |
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| CN201910942570.5A CN110644929B (en) | 2019-09-30 | 2019-09-30 | Electric pulse drill bit |
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| CN110644929B true CN110644929B (en) | 2021-11-30 |
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| CN111119739A (en) * | 2020-01-13 | 2020-05-08 | 中国地质大学（武汉） | High-voltage pulse drill bit and rock breaking experimental device |
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2019
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| US20060037779A1 (en) * | 2004-08-20 | 2006-02-23 | Tetra Corporation | Pulsed electric rock drilling apparatus |
| CN102678044A (en) * | 2012-06-06 | 2012-09-19 | 浙江大学 | Well drilling rod and pulse plasma drilling machine system |
| CN104563882A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Plasma drilling bit |
| CN106988756A (en) * | 2017-05-27 | 2017-07-28 | 中国铁建重工集团有限公司 | A kind of broken rock device and method |
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