CN110630173B - Core drilling machine - Google Patents
Core drilling machine Download PDFInfo
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- CN110630173B CN110630173B CN201910942578.1A CN201910942578A CN110630173B CN 110630173 B CN110630173 B CN 110630173B CN 201910942578 A CN201910942578 A CN 201910942578A CN 110630173 B CN110630173 B CN 110630173B
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- electrode
- drill
- voltage electrode
- drill rod
- sleeve
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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
- E21B10/02—Core 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
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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
- E21B47/00—Survey of boreholes or wells
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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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
- E21B7/00—Special methods or apparatus for drilling
Abstract
The invention discloses a core drilling machine, which comprises a drill rod and an electric pulse drill bit, wherein the central part of the drill rod is provided with a core taking hole, and the electric pulse drill bit comprises: an insulating shell fixedly sleeved with the peripheral part of the drill rod; the high-voltage electrode and the low-voltage electrode are respectively and fixedly arranged on the insulating shell, one of the high-voltage electrode and the low-voltage electrode comprises a first annular electrode, the inner diameter of the first annular electrode is smaller than or equal to that of the coring hole, the other one of the high-voltage electrode and the low-voltage electrode is arranged on the outer periphery of the first annular electrode, and the maximum radial dimension of the other one of the high-voltage electrode and the low-voltage electrode is larger than the outer diameter of the insulating shell; and the high-voltage cable and the low-voltage cable are respectively used for being connected with the anode and the cathode of the power supply. The core drilling machine utilizes the mechanical effect of shock waves, jet flow or plasma channels generated by pulse discharge to crack and break rocks to obtain cores, the drill bit does not need to rotate, the abrasion of the drill bit is small, and the core drilling efficiency is high.
Description
Technical Field
The invention relates to the technical field of drilling equipment, in particular to a core drilling machine.
Background
In the process of mineral exploration and development, drilling work is required to be carried out according to geologically designed stratum horizons and depths, so that in order to visually study underground structures and rock deposition environments, know the properties of fluids and the like in the underground structures and rock deposition environments, a coring tool is generally fed into a well, and a rock sample is drilled to measure various properties of rocks.
The coring tool commonly used at present is a coring drill, and the coring drill in the prior art generally performs drilling and coring by a rotary drilling method. That is, rock is drilled using the mechanical rotation of the drill bit, causing impact damage to the rock, thereby extracting broken rock for use in predicting geological conditions.
However, it can be seen that the mechanical rotary drilling method has a large abrasion to the drill bit, and the drill bit needs to be replaced frequently, which increases the construction period and affects the construction efficiency.
Therefore, how to provide a core drill with a drill bit which is not easy to wear and has high construction efficiency is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a core drill, which has less bit wear and high construction efficiency.
In order to achieve the above purpose, the invention provides the following technical scheme:
a core drilling machine comprising a drill rod and an electric pulse drill bit, the drill rod having a core hole in a central portion thereof, the electric pulse drill bit comprising:
the insulating shell is fixedly sleeved with the peripheral part of the drill rod;
the high-voltage electrode and the low-voltage electrode are respectively fixedly arranged on the insulating shell, one of the high-voltage electrode and the low-voltage electrode comprises a first annular electrode, the inner diameter of the first annular electrode is smaller than or equal to the inner diameter of the coring hole, the other one of the high-voltage electrode and the low-voltage electrode is arranged on the outer peripheral part of the first annular electrode, and the maximum radial dimension of the other one of the high-voltage electrode and the low-voltage electrode is larger than the outer diameter of the insulating shell;
and the high-voltage cable and the low-voltage cable are respectively used for being connected with the positive electrode and the negative electrode of a power supply.
Preferably, the high-voltage electrode comprises the first annular electrode, the low-voltage electrode comprises a second annular electrode arranged around the periphery of the first annular electrode, the outer diameter of the second annular electrode is larger than that of the insulating shell, and a through hole for enabling drilling fluid to flow out together with broken rocks is formed in the side wall of the second annular electrode.
Preferably, the drilling device further comprises a steering device which is connected with the drill rod and used for adjusting the drilling direction of the electric pulse drill bit.
Preferably, the steering device comprises at least three first expansion pipe pieces which are fixedly arranged on the peripheral part of the drill rod and have elasticity, all the first expansion pipe pieces are arranged in a non-collinear manner, and each first expansion pipe piece is provided with a first hydraulic oil hole which is communicated with an independent hydraulic oil channel, so that all the expansion amount of the first expansion pipe pieces is matched with the drill rod to drive the drill rod to change the drilling direction by controlling the hydraulic pressure in the hydraulic oil channel.
Preferably, the steering device further includes:
the fixing sleeve is used for arranging the first expansion duct piece and is sleeved on the peripheral part of the drill rod;
the two positioning rings are respectively connected with the two ends of the fixing sleeve and used for axially limiting the two ends of the fixing sleeve, and the two positioning rings are fixedly arranged on the peripheral part of the drill rod.
Preferably, still include at least one set firmly in drilling rod peripheral part and have elastic second expansion section of jurisdiction, the peripheral part of second expansion section of jurisdiction is equipped with the pressure pad, second expansion section of jurisdiction with the corresponding position of drilling rod is equipped with respectively and is used for making drilling fluid in the coring hole gets into the liquid hole 411 of crossing in the second expansion section of jurisdiction to adjust through control the drilling fluid pressure in the coring hole the inflation degree of second expansion section of jurisdiction makes the pressure pad is in electric pulse drill bit props up the drilling inner wall when working, and keeps away from when electric pulse drill bit removes the drilling inner wall.
Preferably, the packer pipe is fixedly sleeved with the outer periphery of the drill rod, and is provided with:
a second locating groove for receiving and locating the second expansion segment;
and the yielding groove is used for yielding the pressure pad so as to expose the pressure pad.
Preferably, the method further comprises the following steps:
the drill rod connecting sleeve is connected with one end of the drill rod, which is far away from the electric pulse drill bit;
the sleeve is sleeved on the periphery of the drill rod and is respectively connected with one positioning ring and the packer pipe, and the other positioning ring is connected with the insulating shell;
and the cylinder sleeve is sleeved on the periphery of the drill rod and is respectively connected with the packer pipe and the drill rod connecting sleeve.
Preferably, the drill rod connecting sleeve, the cylinder sleeve, the packer pipe, the sleeve, the locating ring and the inside of fixed cover all be equipped with the hydraulic oil passageway section of first expansion segment one-to-one, with same each that first expansion segment corresponds the hydraulic oil passageway section communicates each other, in order to form the hydraulic oil passageway, fixed cover is equipped with second hydraulic oil hole, the second hydraulic oil hole respectively with correspond first hydraulic oil hole with the hydraulic oil passageway intercommunication.
Preferably, the drill pipe connecting sleeve, the cylinder sleeve, the packer pipe, the sleeve, the positioning ring and the insulating casing are all provided with cable channels for respectively placing the high-voltage cable and the low-voltage cable inside.
According to the coring drilling machine provided by the invention, when the high-voltage electrode and the low-voltage electrode are respectively connected with a power supply through the high-voltage cable and the low-voltage cable, pulse discharge is generated between the high-voltage electrode and the low-voltage electrode, so that rock between the high-voltage electrode and the low-voltage electrode can crack and break by utilizing the mechanical effect of shock waves, jet flow or plasma channels generated by the pulse discharge, the internal area surrounded by the first annular electrode cannot generate the electric pulse effect, and the internal diameter of the first annular electrode is not more than that of the coring hole, so that a rock core positioned in the first annular electrode can enter the coring hole to be used as a rock sample to measure various properties of the rock.
Therefore, compared with the conventional core drilling machine for drilling and coring by a rotary drilling method in the prior art, the core drilling machine provided by the invention utilizes the mechanical effect of shock waves, jet flow or plasma channels generated by pulse discharge to crack and break rocks so as to obtain cores, the drill bit does not need to rotate, the abrasion of the drill bit is small, and the coring efficiency is high; meanwhile, the coring mode has little pollution and little influence on the environment.
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 schematic diagram of a coring drill provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of the drill pipe coupling sleeve of FIG. 1 shown without the sleeve;
FIG. 3 is a schematic structural view of the pipe coupling sleeve and the packer pipe of FIG. 1 shown without the pipe coupling sleeve and the packer pipe;
FIG. 4 is a partial schematic view of C in FIG. 3 (the second expanded duct sheet and pressure pad on the upper side not shown);
fig. 5 is a schematic view of the pouch of fig. 1;
FIG. 6 is a schematic illustration of the construction of the first expanded duct sheet of FIG. 1;
FIG. 7 is a schematic assembled structure of the steering device of FIG. 1;
FIG. 8 is a schematic diagram of the external structure of the electric pulse drill bit of FIG. 1;
FIG. 9 is a schematic diagram of the internal structure of the electric pulse drill bit of FIG. 1;
FIG. 10 is a partial exploded view of A of FIG. 1;
FIG. 11 is a partial exploded view of B of FIG. 1;
FIG. 12 is a cross-sectional view of the coring drill of FIG. 1;
FIG. 13 is a partial schematic view of D of FIG. 12;
FIG. 14 is a partial schematic view of E in FIG. 12;
FIG. 15 is a partial schematic view of F in FIG. 12;
FIG. 16 is a partial schematic view of G of FIG. 12;
fig. 17 is a partial schematic view of H in fig. 12.
The reference numerals in fig. 1 to 17 are as follows:
the device comprises a drill stem 1, an electric pulse drill bit 2, an insulating shell 21, a high-voltage electrode 22, a low-voltage electrode 23, a high-voltage cable 24, a low-voltage cable 25, a first expansion pipe piece 31, a first hydraulic oil hole 311, a fixing sleeve 32, a second hydraulic oil hole 321, a positioning ring 33, a second expansion pipe piece 41, a liquid passing hole 411, a pressure pad 42, a packer pipe 43, a sealing ring 44, a drill stem connecting sleeve 5, a sleeve 6, a cylinder sleeve 7, a hydraulic oil channel segment 8 and a cable channel 9.
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 the core drill, which has small drill bit abrasion and high construction efficiency.
Referring to fig. 1-17, the drawings are provided to assist in understanding the following description of the invention.
The invention provides a core drill, which comprises a drill rod 1 and an electric pulse drill bit 2, wherein the center part of the drill rod 1 is provided with a core hole, and the electric pulse drill bit 2 comprises an insulating shell 21, a high-voltage electrode 22, a low-voltage electrode 23, a high-voltage cable 24 and a low-voltage cable 25.
Specifically, the insulating case 21 is used to dispose the high voltage electrode 22 and the low voltage electrode 23 and insulate and isolate the high voltage electrode 22 and the low voltage electrode 23. The insulating shell 21 is fixedly sleeved with a sleeve 32 at the outer periphery of the drill rod 1 to realize the connection of the electric pulse drill bit 2 and the drill rod 1.
It should be noted that the length of the insulating housing 21 is not limited in the present invention, for example, the insulating housing 21 may be sleeved on only one end of the drill rod 1, or may be sleeved on the entire periphery of the drill rod 1 along the axial direction.
The high voltage electrode 22 and the low voltage electrode 23 are both disposed on the insulating housing 21, preferably, the front end of the insulating housing 21 is provided with a first mounting groove and a second mounting groove, and the high voltage electrode 22 and the low voltage electrode 23 are disposed in the first mounting groove and the second mounting groove, respectively.
In order to obtain a complete rock core sample, one of the high voltage electrode 22 and the low voltage electrode 23 comprises a first ring electrode having an inner diameter smaller than or equal to an inner diameter of the coring hole, and the other of the high voltage electrode 22 and the low voltage electrode 23 is disposed at an outer peripheral portion of the first ring electrode, and a maximum radial dimension of a region where it is disposed is larger than an outer diameter of the insulating housing 21.
The high-voltage electrode 22 is connected with a high-voltage cable 24, the low-voltage electrode 23 is connected with a low-voltage cable 25, and the high-voltage cable 24 and the low-voltage cable 25 are respectively used for being connected with the positive pole and the negative pole of a power supply.
It can be understood that when the high voltage electrode 22 and the low voltage electrode 23 are connected to the power supply through the high voltage cable 24 and the low voltage cable 25, respectively, a pulse discharge is generated between the high voltage electrode 22 and the low voltage electrode 23, so that the rock between the high voltage electrode 22 and the low voltage electrode 23 can be cracked and broken by using the mechanical effect of the shock wave, jet flow or plasma channel generated by the pulse discharge, and the inner region surrounded by the first ring electrode does not generate the electric pulse effect.
It can be seen that the present invention ensures that one of the high voltage electrode 22 and the low voltage electrode 23 has a first annular electrode for coring; and causing the first ring electrode to generate an electrical pulse effect with the other of the high voltage electrode 22 and the low voltage electrode 23 to break rock between the first ring electrode and the other of the high voltage electrode 22 and the low voltage electrode 23 to facilitate continued forward drilling by the core drill.
Specifically, when the high voltage electrode 22 includes a first ring electrode, the low voltage electrode 23 is disposed at an outer peripheral portion of the first ring electrode. At this time, the present invention does not limit the specific shape and distribution of the low voltage electrode 23, for example, as a preferable scheme, the low voltage electrode 23 includes a second annular electrode surrounding the outer periphery of the first annular electrode, the outer diameter of the second annular electrode is larger than the outer diameter of the insulating housing 21, and the side wall of the second annular electrode is provided with a through hole for flowing out the drilling fluid and the broken rock.
That is, the high voltage electrode 22 and the low voltage electrode 23 in this embodiment each include a ring electrode, and in the traveling direction, the high voltage electrode 22 and the low voltage electrode 23 are both circular ring-shaped, and the rock in the region between the first ring electrode and the second ring electrode can be broken by the electric pulse effect, and the rock inside the first ring electrode can enter the coring hole. At the same time, during drilling, drilling fluid and rock being broken by the electrically pulsed drill bit 2 can be made to flow out along the through-hole in the side wall of the second ring electrode.
As another preferable mode, the low voltage electrode 23 includes at least two segment electrodes distributed on the outer peripheral portion of the first ring electrode, and the maximum radial dimension of the distribution area of all the segment electrodes is larger than the outer diameter of the insulating housing 21. Meanwhile, the high-voltage electrode 22 further comprises an electrode wing which is inserted between two adjacent segmented electrodes, so that the rock between the high-voltage electrode 22 and the low-voltage electrode 23 is sufficiently crushed, and the continuous drilling of the core drilling machine is prevented from being influenced.
Of course, when the high voltage electrode 22 comprises a first ring electrode, the low voltage electrode 23 may also be of other shapes or distributions.
Similarly, when the low voltage electrode 23 includes a first ring electrode, the high voltage electrode 22 is disposed at an outer peripheral portion of the first ring electrode. At this time, the present invention does not limit the specific shape and distribution of the high voltage electrode 22, and reference is made to the shape and distribution of the low voltage electrode 23 when the high voltage electrode 22 includes the first ring electrode, which is not described herein again.
In conclusion, compared with the conventional core drill for drilling and coring by a rotary drilling method in the prior art, the core drill provided by the invention utilizes the mechanical effect of shock waves, jet flow or plasma channels generated by pulse discharge to crack and break rocks so as to obtain the cores, the drill bit does not need to rotate, the abrasion of the drill bit is small, and the coring efficiency is high; meanwhile, the coring mode has little pollution and little influence on the environment.
In order to adjust the drilling direction of the drill rod 1, a steering device connected with the drill rod 1 and used for adjusting the drilling direction of the electric pulse drill head 2 is further included on the basis of the above embodiment.
That is, the present embodiment adjusts the drilling direction of the drill rod 1 by the steering device connected to the drill rod 1, so that the drilling direction of the electric pulse drill bit 2 is adjustable.
It should be noted that the specific structure of the steering device is not limited in this embodiment, and a person skilled in the art may use a conventional steering device in the prior art to adjust the drilling direction of the drill rod 1.
As a preferable scheme, on the basis of the above embodiment, the steering device includes at least three first expansion pipe pieces 31 which are fixedly arranged on the outer circumferential portion of the drill rod 1 and have elasticity, all the first expansion pipe pieces 31 are arranged non-collinearly, and each first expansion pipe piece 31 is provided with a first hydraulic oil hole 311 for communicating with an independent hydraulic oil channel, so that the expansion amount of all the first expansion pipe pieces 31 is matched to push the drill rod 1 to change the drilling direction by controlling the hydraulic oil pressure in each hydraulic oil channel.
That is to say, this embodiment makes first expansion segment 31 and hydraulic oil passageway intercommunication through first hydraulic pressure oilhole 311 to make the hydraulic oil in each independent hydraulic oil passageway flow into respectively in the first expansion segment 31 that corresponds, because first expansion segment 31 has elasticity, consequently, can be through the hydraulic pressure force in the different hydraulic oil passageways of control, change the expansion deflection of the first expansion segment 31 that corresponds with the hydraulic oil passageway, because the peripheral part of the non-collinear setting of first expansion segment 31 more than three sets firmly at drilling rod 1, consequently, the different combinations of each first expansion segment 31 expansion deflection of accessible change the drilling direction of drilling rod 1, and then drive electric pulse drill bit 2 and turn to, realize the directional control of core drill rig drilling in-process.
In view of the convenience of the arrangement of the first expansion pipe piece 31, on the basis of the above embodiment, the steering device further includes a fixing sleeve 32 and two positioning rings 33, the fixing sleeve 32 is used for assembling the first expansion pipe piece 31, so that the relative position between the first expansion pipe pieces 31 is kept unchanged, then the fixing sleeve 32 is sleeved on the outer periphery of the drill rod 1, and the fixing sleeve 32 is fixed and axially limited by the two positioning rings 33, two ends of the fixing sleeve 32 are respectively connected with the two positioning rings 33, and the two positioning rings 33 are fixedly arranged on the outer periphery of the drill rod 1, so that the first expansion pipe piece 31 and the drill rod 1 are fixed.
When the first expansion pipe piece 31 expands and deforms under the action of the oil pressure entering the first expansion pipe piece 31, the first expansion pipe piece 31 can drive the fixed sleeve 32 and the positioning ring 33 to change in position, so that the positioning ring 33 drives the drill rod 1 to change in position, and the drilling direction of the drill rod 1 is adjusted.
It should be noted that, in this embodiment, the specific number of the fixing sleeves 32 is not limited, the number of the fixing sleeves 32 may be equal to the number of the first expansion duct pieces 31, and each first expansion duct piece 31 is respectively assembled on one fixing sleeve 32; it is also possible to fit a plurality of first expansion segment 31 on one fixing sleeve 32, or to fit all the expansion segments on one fixing sleeve 32, as long as the relative positional relationship of all the first expansion segments 31 can be ensured.
Preferably, the number of the fixing sleeve 32 is one, and the fixing sleeve 32 is provided with a first positioning groove corresponding to the first expansion duct piece 31 one to one, and the first positioning groove is a stepped groove for embedding the edge portion of the first expansion duct piece 31 and exposing the pipe body of the first expansion duct piece 31, so as to avoid the expansion deformation of the first expansion duct piece 31 while realizing the positioning of the first expansion duct piece 31.
Further preferably, the first positioning grooves are uniformly distributed along the circumference of the fixing sleeve 32.
In order to improve the stability of the electric pulse drill bit 2 during operation, on the basis of the above embodiment, the electric pulse drill bit further comprises at least one second expansion segment 41 which is fixedly arranged on the outer periphery of the drill rod 1 and has elasticity, the outer periphery of the second expansion segment 41 is provided with a pressure pad 42, the positions of the second expansion segment 41 corresponding to the drill rod 1 are respectively provided with a liquid passing hole 411 for enabling drilling liquid in the coring hole to enter the second expansion segment 41, so that the expansion degree of the second expansion segment 41 is adjusted by controlling the drilling liquid pressure in the coring hole, and the pressure pad 42 tightly supports the inner wall of the drill hole when the electric pulse drill bit 2 operates and is far away from the inner wall of the drill hole when the electric pulse drill bit 2.
That is to say, this embodiment is through setting up second expansion segment 41 in drilling rod 1 peripheral part to through setting up liquid hole 411 and making second expansion segment 41 and coring hole intercommunication, thereby make the drilling fluid in the coring hole can get into in second expansion segment 41, because second expansion segment 41 has elasticity, consequently, can adjust the inflation degree of second expansion segment 41 through the drilling fluid pressure control in the coring hole.
Specifically, when electric pulse drill 2 during operation, through the pressure with drilling fluid transfer big, make the drilling fluid in the coring hole get into second expansion section of jurisdiction 41, and then make second expansion section of jurisdiction 41 inflation, second expansion section of jurisdiction 41 promotes pressure pad 42 through the inflation and outwards removes, offsets until pressure pad 42 and the contact of drilling inner wall, makes pressure pad 42 support on the drilling inner wall to guarantee the stability of electric pulse drill 2 during operation.
When core drilling machine needs to remove, adjust for a short time through the pressure with drilling fluid, make the drilling fluid in the second expansion section of jurisdiction 41 get back to in the coring hole, make second expansion section of jurisdiction 41 reply initial condition, and then make pressure pad 42 reply initial position thereupon, leave the drilling inner wall, break away from the contact with the drilling inner wall to avoid hindering core drilling machine's removal.
It should be noted that, the specific number and distribution of the second expansion tube sheets 41 are not limited in this embodiment, and preferably, the number of the second expansion tube sheets 41 is two, and the two second expansion tube sheets 41 are symmetrically distributed about the drill pipe 1.
Further, the present embodiment does not limit the number and distribution of the pressure pads 42 provided on the outer peripheral portion of the single second inflatable duct piece 41, and preferably, the number of the pressure pads 42 is at least two, and all the pressure pads 42 are provided in a collinear manner.
In view of the convenience of the arrangement of the second expansion duct piece 41, on the basis of the above embodiment, the expansion duct piece further comprises a packer pipe 43 for arranging the second expansion duct piece 41, the packer pipe 43 is fixedly sleeved with the outer periphery of the drill rod 1, the packer pipe 43 is provided with a second positioning groove and a relief groove, and the second positioning groove is used for assembling the second expansion duct piece 41, so that the second expansion duct piece 41 is accommodated and positioned in the second positioning groove; the relief groove serves to relieve the pressure pad 42 to expose the pressure pad 42 so that the pressure pad 42 can contact the inner wall of the borehole.
In order to avoid leakage of drilling fluid from both ends of the packer pipe 43, it is preferable that both ends of the packer pipe are provided with sealing rings 44 for sealing both ends of the packer pipe 43.
In order to protect the whole peripheral part of the drill rod 1, on the basis of the above embodiment, the drill rod connecting device further comprises a drill rod connecting sleeve 5, a sleeve 6 and a cylinder sleeve 7, wherein the drill rod connecting sleeve 5 is connected with one end of the drill rod 1 far away from the electric pulse drill bit 2, the sleeve 6 is sleeved on the peripheral part of the drill rod 1, two ends of the sleeve 6 are respectively connected with one positioning ring 33 and one end of the packer pipe 43, and the other positioning ring 33 is connected with the insulating shell 21; the cylinder sleeve 7 is sleeved on the periphery of the drill rod 1, and two ends of the cylinder sleeve 7 are respectively connected with the other end of the packer pipe 43 and the drill rod connecting sleeve 5.
That is, the insulating housing 21, the positioning ring 33, the fixing sleeve 32, the sleeve 6, the packer tube 43, the cylinder sleeve 7 and the drill rod connecting sleeve 5 are sequentially arranged on the outer periphery of the drill rod 1, and any adjacent two of the insulating housing 21, the positioning ring 33, the fixing sleeve 32, the sleeve 6, the packer tube 43, the cylinder sleeve 7 and the drill rod connecting sleeve 5 are mutually connected and limited, so that the insulating housing 21, the positioning ring 33, the fixing sleeve 32, the sleeve 6, the packer tube 43, the cylinder sleeve 7 and the drill rod connecting sleeve 5 are connected into a whole, and the whole outer periphery of the drill rod 1 is protected while respective specific functions are achieved.
Preferably, the outer diameters of the insulating housing 21, the positioning ring 33, the fixing sleeve 32, the sleeve 6, the packer tube 43, the cylinder liner 7 and the drill rod connecting sleeve 5 are equal.
It should be noted that, in this embodiment, the power supply may be disposed inside the core drill, for example, the power supply may be disposed inside the sleeve 6, the cylinder sleeve 7, or the drill rod connecting sleeve 5, in which case, the high-voltage cable 24 and the low-voltage cable 25 do not need to extend to the outside of the core drill, the power supply inside the core drill is automatically supplied, and the on/off of the power supply is controlled by a switch disposed on the outer wall of the core drill or by wireless control.
Of course, the power supply may be external to the coring drill, independent of the coring drill.
Considering the circumferential positioning problem of the drill rod 1 and the drill rod connecting sleeve 5, on the basis of the above embodiment, the inside of the drill rod connecting sleeve 5 is set to be a polygonal clamping groove, and a clamping ring matched with the polygonal clamping groove in shape is arranged at one end, facing the drill rod connecting sleeve 5, of the drill rod 1, and during assembly, the clamping ring and the polygonal clamping groove are matched with each other, so that the circumferential positioning of the drill rod 1 and the drill rod connecting sleeve 5 is realized, and the circumferential rotation of the drill rod 1 is prevented.
In consideration of the arrangement mode of the hydraulic oil channel, on the basis of the above embodiment, the drill rod connecting sleeve 5, the cylinder sleeve 7, the packer tube 43, the sleeve 6, the positioning ring 33 and the fixing sleeve 32 are all provided with a plurality of hydraulic oil channel sections 8 inside, the drill rod connecting sleeve 5, the cylinder sleeve 7, the packer tube 43, the sleeve 6, the positioning ring 33 and the fixing sleeve 32 are respectively provided with a plurality of hydraulic oil channel sections 8 on one and one corresponding to the first expansion pipe pieces 31, the hydraulic oil channel sections 8 corresponding to the same first expansion pipe piece 31 are communicated with each other to form a hydraulic oil channel, the fixing sleeve 32 is provided with a second hydraulic oil hole 321, and the second hydraulic oil hole 321 is respectively communicated with the corresponding first hydraulic oil hole 311 and the hydraulic oil channel.
That is, the hydraulic oil finally flows into the corresponding first expansion pipe piece 31 from the second hydraulic oil hole 321 and the first hydraulic oil hole 311 in sequence through the drill rod connecting sleeve 5, the cylinder sleeve 7, the packer pipe 43, the sleeve 6, the positioning ring 33 and each hydraulic oil passage section 8 communicated with the inside of the fixing sleeve 32.
In consideration of the arrangement of the high-voltage cable 24 and the low-voltage cable 25, on the basis of the above embodiments, the drill rod connecting sleeve 5, the cylinder sleeve 7, the packer pipe 43, the sleeve 6, the positioning ring 33 and the inside of the insulating housing 21 are provided with the cable passages 9 for respectively placing the high-voltage cable 24 and the low-voltage cable 25.
That is, the drill pipe connecting sleeve 5, the cylinder liner 7, the packer pipe 43, the sleeve 6, the positioning ring 33 and the inside of the insulating housing 21 are provided with two cable passages 9, one for the high voltage cable 24 and the other for the low voltage cable 25.
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 coring drill provided by the present 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 (8)
1. Core drilling machine, characterized in that, includes drilling rod (1) and electric pulse drill bit (2), the central part of drilling rod (1) is equipped with the coring hole, electric pulse drill bit (2) includes:
an insulating shell (21) fixedly sleeved with the peripheral part of the drill rod (1);
a high voltage electrode (22) and a low voltage electrode (23) respectively fixed on the insulating shell (21), wherein one of the high voltage electrode (22) and the low voltage electrode (23) comprises a first annular electrode, the inner diameter of the first annular electrode is smaller than or equal to the inner diameter of the coring hole, the other one of the high voltage electrode (22) and the low voltage electrode (23) is arranged on the outer periphery of the first annular electrode, and the maximum radial dimension of the other one is larger than the outer diameter of the insulating shell (21);
the high-voltage cable (24) and the low-voltage cable (25) are correspondingly connected with the high-voltage electrode (22) and the low-voltage electrode (23) respectively, and the high-voltage cable (24) and the low-voltage cable (25) are used for being connected with the positive electrode and the negative electrode of a power supply respectively;
with drilling rod (1) link to each other, be used for the adjustment the device that turns to of the direction of creeping into of electric pulse drill bit (2), turn to the device including at least three set firmly in drilling rod (1) peripheral part just has elastic first expansion section of jurisdiction (31), all first expansion section of jurisdiction (31) non-collinear setting, each first expansion section of jurisdiction (31) all is equipped with first hydraulic pressure oilhole (311) that are used for with independent hydraulic oil passageway intercommunication, in order through control each hydraulic pressure force in the hydraulic oil passageway makes all the inflation volume cooperation of first expansion section of jurisdiction (31) promotes drilling rod (1) changes the direction of creeping into.
2. The core drilling machine according to claim 1, wherein said high voltage electrode (22) comprises said first ring electrode, said low voltage electrode (23) comprises a second ring electrode surrounding said first ring electrode at its outer circumference, said second ring electrode having an outer diameter larger than the outer diameter of said insulating housing (21), the side wall of said second ring electrode being provided with a through hole for the outflow of drilling fluid together with the crushed rock.
3. The coring drill of claim 1 or 2, wherein the steering device further comprises:
a fixing sleeve (32) for arranging the first expansion pipe sheet (31), wherein the fixing sleeve (32) is sleeved on the peripheral part of the drill rod (1);
the two positioning rings (33) are respectively connected with the two ends of the fixed sleeve (32) and used for axially limiting the two ends of the fixed sleeve (32), and the two positioning rings (33) are fixedly arranged on the peripheral part of the drill rod (1).
4. The core drilling machine as claimed in claim 3, further comprising at least one second expansion pipe piece (41) which is fixedly arranged on the outer periphery of the drill rod (1) and has elasticity, wherein a pressure pad (42) is arranged on the outer periphery of the second expansion pipe piece (41), and the positions of the second expansion pipe piece (41) corresponding to the drill rod (1) are respectively provided with a liquid passing hole (411) for allowing the drilling liquid in the core hole to enter the second expansion pipe piece (41), so that the expansion degree of the second expansion pipe piece (41) can be adjusted by controlling the pressure of the drilling liquid in the core hole, and the pressure pad (42) can tightly support the inner wall of the drill hole when the electric pulse drill bit (2) works and can be far away from the inner wall of the drill hole when the electric pulse drill bit (2) moves.
5. Core drilling machine according to claim 4, further comprising a packer tube (43) fixedly sleeved with the outer circumference of the drill rod (1), the packer tube (43) being provided with:
a second locating slot for receiving and locating the second expansion duct piece (41);
a yielding groove for yielding the pressure pad (42) to expose the pressure pad (42).
6. The coring drill of claim 5, further comprising:
the drill rod connecting sleeve (5) is connected with one end of the drill rod (1) far away from the electric pulse drill bit (2);
the sleeve (6) is sleeved on the periphery of the drill rod (1) and is respectively connected with one positioning ring (33) and the packer pipe (43), and the other positioning ring (33) is connected with the insulating shell (21);
and the cylinder sleeve (7) is sleeved on the peripheral part of the drill rod (1) and is respectively connected with the packer pipe (43) and the drill rod connecting sleeve (5).
7. The core drilling machine as recited in claim 6, wherein the drill rod connecting sleeve (5), the cylinder sleeve (7), the packer tube (43), the sleeve (6), the positioning ring (33) and the fixing sleeve (32) are internally provided with hydraulic oil passage sections (8) corresponding to the first expansion pipe pieces (31) one by one, the hydraulic oil passage sections (8) corresponding to the same first expansion pipe pieces (31) are communicated with each other to form the hydraulic oil passage, the fixing sleeve (32) is provided with a second hydraulic oil hole (321), and the second hydraulic oil hole (321) is respectively communicated with the corresponding first hydraulic oil hole (311) and the hydraulic oil passage.
8. Core drilling machine according to claim 6, characterized in that the drill rod connection sleeve (5), the cylinder liner (7), the packer tube (43), the sleeve (6), the positioning ring (33) and the interior of the insulating housing (21) are each provided with a cable channel (9) for placing the high-voltage cable (24) and the low-voltage cable (25), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942578.1A CN110630173B (en) | 2019-09-30 | 2019-09-30 | Core drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942578.1A CN110630173B (en) | 2019-09-30 | 2019-09-30 | Core drilling machine |
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| CN110630173A CN110630173A (en) | 2019-12-31 |
| CN110630173B true CN110630173B (en) | 2021-03-23 |
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| CN112112566A (en) * | 2020-10-12 | 2020-12-22 | 中国铁建重工集团股份有限公司 | Guiding drilling tool for horizontal directional core drilling |
| CN112343510B (en) * | 2020-11-04 | 2023-01-24 | 北京三一智造科技有限公司 | Construction method for crushing rock and coring by using plasma pulse |
| CN113565449B (en) * | 2021-07-21 | 2023-08-22 | 西南石油大学 | Cable connection device used between electric pulse-mechanical composite rock breaking drill bit and drilling tool |
| CN114592815A (en) * | 2022-03-31 | 2022-06-07 | 陕西太合智能钻探有限公司 | Core sampling device for directional branch drilling |
| CN115266199B (en) * | 2022-08-03 | 2023-04-25 | 西安石油大学 | Petroleum geological exploration sampling device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3017897B1 (en) * | 2014-02-21 | 2019-09-27 | I.T.H.P.P | ROTARY DRILLING SYSTEM BY ELECTRIC DISCHARGES |
| CN106677701B (en) * | 2017-01-23 | 2018-08-17 | 珠海市英格尔特种钻探设备有限公司 | A kind of Engineering Geologic Drilling Practice method based on cord coring drill |
| CN206785305U (en) * | 2017-04-06 | 2017-12-22 | 深圳市嘉景丰建筑工程有限公司 | A kind of hollow hammer hole reacting cycle continuous sampling rig |
| CN207988947U (en) * | 2018-01-18 | 2018-10-19 | 中国地质大学（武汉） | Electric pulse rock breaking drill bit and experimental device thereof |
| CN108222838B (en) * | 2018-01-18 | 2023-04-07 | 中国地质大学（武汉） | Rock breaking experimental device of electric pulse rock breaking drill bit |
| CN108343378B (en) * | 2018-01-29 | 2019-09-03 | 中国矿业大学 | A kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary |
| CN109577864B (en) * | 2018-07-03 | 2020-04-07 | 西南石油大学 | Electrode drill bit for coiled tubing high-voltage electric pulse-mechanical composite drilling |
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