CN109989714B - Drill bit for ultra-high rotation speed drilling of deep hard stratum - Google Patents
Drill bit for ultra-high rotation speed drilling of deep hard stratum Download PDFInfo
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- CN109989714B CN109989714B CN201910367169.3A CN201910367169A CN109989714B CN 109989714 B CN109989714 B CN 109989714B CN 201910367169 A CN201910367169 A CN 201910367169A CN 109989714 B CN109989714 B CN 109989714B
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- 238000005553 drilling Methods 0.000 title claims abstract description 43
- 239000011159 matrix material Substances 0.000 claims abstract description 44
- 239000010432 diamond Substances 0.000 claims abstract description 33
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 33
- 230000036346 tooth eruption Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 27
- 238000005452 bending Methods 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000005755 formation reaction Methods 0.000 claims description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052580 B4C Inorganic materials 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 239000011435 rock Substances 0.000 description 21
- 239000012530 fluid Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Abstract
The invention relates to a deep geological exploration coring tool, in particular to a drill bit for ultra-high rotation speed drilling of a deep hard stratum. The drill bit for deep hard stratum ultrahigh rotation speed drilling comprises a drill bit body, wherein one end of the drill bit body is fixedly connected with a joint, the other end of the drill bit body is fixedly provided with a plurality of drill bit matrixes uniformly distributed along the circumference, a space is reserved between two adjacent drill bit matrixes, and a working surface of the drill bit matrix is fixedly provided with reinforced polycrystalline diamond cutting teeth; also comprises a plurality of gauge protection which are fixedly connected with the side wall of the drill bit matrix and the side wall of the rotary head body, the plurality of gauge protection corresponds to the plurality of drill bit matrix one by one, the top of gauge and the working face parallel and level of drill bit matrix have the interval between two adjacent gauge, still are provided with the reposition of redundant personnel water course on the gauge, and the top of reposition of redundant personnel water course is parallel and level with the top of gauge. The drill bit for deep hard stratum ultrahigh-speed drilling provided by the invention has the advantages of fast heat dissipation, fast powder discharge, small vibration and anti-slip performance.
Description
Technical Field
The invention relates to a deep geological exploration coring tool, in particular to a drill bit for ultra-high rotation speed drilling of a deep hard stratum.
Background
When deep exploration is carried out, researchers at home and abroad often adopt high-speed turbo drilling tools (2000 rpm, linear speed of 2.5 m/s) with diamond-impregnated drill bits to break rock, but the practical effect is limited because the bit pressure is difficult to load effectively. On the basis, researchers at home and abroad begin to adopt a rock breaking mode with ultra-high rotation speed (8000 rpm and linear speed of 10 m/s), so that the problem that the stratum is difficult to be eaten by low bit pressure is solved, the rock breaking efficiency is greatly improved, and a good effect is achieved in a laboratory.
The existing diamond-impregnated drill bit is characterized in that even diamond particles are added into a drill bit matrix, and the diamond-impregnated drill bit is essentially small-particle diamond serving as a cutting original piece, and has long service life and more in-situ in a conventional hard stratum. Therefore, the arrangement of the impregnated insert on the blade can only damage the rock by grinding, and the rock scraps are not smoothly discharged under the high-rotating-speed operation condition; the environment temperature of the deep stratum is too high, the deep stratum (especially the abnormal region of the ground temperature) often has high temperature of more than 240 ℃ due to the existence of the ground temperature gradient, the environment high temperature and the heat generated by the high-speed rotation grinding of the rock of the drill bit jointly act, the mechanical property of the conventional artificial diamond is difficult to keep at normal temperature at the temperature, the brittleness is obviously increased, and the service life of the drill bit is shortened; because the drill rod is too long and is difficult to load the drilling pressure effectively in deep hard stratum drilling, the rock breaking capacity of the drill bit is insufficient, the phenomenon of stick-slip still occurs under the condition of ultra-high rotating speed, and the mechanical drilling speed is reduced; in addition, due to the application of the ultra-high rotation speed technology, the drill bit is easy to jump, and the impact resistance of the existing diamond-impregnated drill bit is insufficient. These factors severely limit the efficient development of deep geological resources by conventional diamond-impregnated bits.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide the deep hard stratum ultrahigh-rotation-speed drilling bit which is quick in heat dissipation, quick in powder discharge, small in vibration and anti-slip.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a drill bit for ultra-high rotation speed drilling of a deep hard stratum, which comprises a drill bit body, wherein one end of the drill bit body is fixedly connected with a joint, the other end of the drill bit body is fixedly provided with a plurality of drill bit matrixes uniformly distributed along the circumference, a space is reserved between two adjacent drill bit matrixes, and a working surface of each drill bit matrix is fixedly provided with a reinforced polycrystalline diamond cutting tooth; the drill bit also comprises a plurality of gauge protection fixedly connected with the side wall of the drill bit matrix and the side wall of the drill bit body, the plurality of gauge protection corresponds to the plurality of drill bit matrix one by one, the top of gauge is with the working face parallel and level of drill bit matrix, has the interval between the adjacent two gauge, still be provided with the reposition of redundant personnel water course on the gauge, the top of reposition of redundant personnel water course with the top parallel and level of gauge.
Preferably, each working face of the drill bit matrix is fixedly provided with one reinforced polycrystalline diamond cutting tooth, the number of the drill bit matrix is eight, and the orientations of the eight reinforced polycrystalline diamond cutting teeth are the same and distributed on the circumferences of three concentric circles with different radiuses.
Preferably, the diversion water channel is a through groove arranged on the side wall of the gauge protection.
Preferably, the diversion water channel comprises a vertical portion and a bending portion, the top end of the vertical portion is flush with the top end of the gauge, the bottom end of the vertical portion is communicated with the top end of the bending portion, and the bending portion is inclined downwards and faces the other gauge.
Preferably, the directions of the bending parts in the plurality of diversion channels are the same.
Preferably, the width of the bending part is greater than the width of the vertical part.
Preferably, the connector is in an inverted cone shape, and the side wall of the connector is provided with external threads.
Preferably, the drill bit matrix is equal in size.
Preferably, the drill bit matrix comprises a primary abrasive, a secondary abrasive and a filler material.
Preferably, the primary abrasive is a TSP material; the auxiliary abrasive comprises silicon carbide, tungsten carbide, silicon nitride, corundum and boron carbide; the filling material is a sialon series ceramic material.
The invention provides a drill bit for ultra-high rotation speed drilling of a deep hard stratum, which has the advantages of fast heat dissipation, fast powder discharge, small vibration and anti-slip. According to the drill bit for deep hard stratum ultrahigh rotation speed drilling, provided by the invention, the reinforced polycrystalline diamond cutting teeth are arranged, so that the performance of the drill bit in rock attack is improved, furrows can be formed when the drill bit drills, a certain supporting effect is achieved, meanwhile, the powder discharge and the drilling fluid passing through are ensured, and the slipping problem when a hard and compact stratum drills is solved; the ordered polycrystalline diamond cutting teeth can enable the drill bit to cut into rock more smoothly, and play a supporting role to facilitate drilling fluid circulation and rock debris discharge; the reinforced polycrystalline diamond cutting teeth embedded in the working face of each drill bit matrix are distributed according to certain horizontal and vertical positions, so that the drill bit is guaranteed to have continuous rock cutting capability and can be stably and excessively used, the vibration frequency of the drill bit is reduced, powder discharge and drilling fluid passing are guaranteed, and stick-slip is prevented. The drill bit for deep hard stratum ultrahigh-speed drilling provided by the invention can adapt to the stress of the deep hard stratum by arranging the gauge protection, and prevent the drill bit from shrinking. When the drill bit moves at the ultrahigh rotating speed, the friction between the drill bit and rock can cause a great deal of heat, and the drilling fluid circulation is promoted through the support of the reinforced polycrystalline diamond cutting teeth and the design of the diversion water channel, so that the heat can be rapidly taken away. According to the reinforced polycrystalline diamond cutting tooth, the main abrasive, the auxiliary abrasive and the filling material are matched in the drill bit matrix, so that the main abrasive and the auxiliary abrasive are exposed timely, the self-sharpening of the drill bit is maintained, and the drilling efficiency is improved.
Drawings
FIG. 1 is a schematic view of a deep hard formation ultra-high speed drilling bit according to one embodiment of the present invention;
FIG. 2 is a schematic view showing the arrangement of cutting teeth in a first embodiment of a drill bit for ultra-high speed drilling of deep hard formations according to the present invention;
FIG. 3 is a schematic view of a second embodiment of a drill bit for ultra-high speed drilling of deep hard formations according to the present invention;
the cutter comprises a 1-bit body, a 2-connector, a 3-bit matrix, 4-reinforced polycrystalline diamond cutting teeth, a 5-gauge, a 6-diversion water channel, a 61-vertical part and a 62-bending part.
Detailed Description
The invention provides a drill bit for ultra-high rotation speed drilling of a deep hard stratum, which comprises a drill bit body, wherein one end of the drill bit body is fixedly connected with a joint, the other end of the drill bit body is fixedly provided with a plurality of drill bit matrixes uniformly distributed along the circumference, a space is reserved between two adjacent drill bit matrixes, and a working surface of each drill bit matrix is fixedly provided with a reinforced polycrystalline diamond cutting tooth; the drill bit also comprises a plurality of gauge protection fixedly connected with the side wall of the drill bit matrix and the side wall of the drill bit body, the plurality of gauge protection corresponds to the plurality of drill bit matrix one by one, the top of gauge is with the working face parallel and level of drill bit matrix, has the interval between the adjacent two gauge, still be provided with the reposition of redundant personnel water course on the gauge, the top of reposition of redundant personnel water course with the top parallel and level of gauge.
As one embodiment of the invention, one reinforced polycrystalline diamond cutting tooth is fixedly arranged on the working surface of each drill bit matrix, the number of the drill bit matrix is eight, and the eight reinforced polycrystalline diamond cutting teeth are oriented identically and distributed on the circumferences of three concentric circles with different radiuses.
As one embodiment of the present invention, the diversion channel is a through groove provided on the sidewall of the gauge.
As one embodiment of the invention, the diversion waterway comprises a vertical part and a bending part, wherein the top end of the vertical part is level with the top end of the gauge, the bottom end of the vertical part is communicated with the top end of the bending part, and the bending part is inclined downwards and faces to the other gauge.
As an embodiment of the present invention, the directions of the bending portions in the plurality of diversion channels are the same.
As an embodiment of the present invention, the width of the bent portion is greater than the width of the vertical portion.
As one embodiment of the invention, the joint is in an inverted cone shape, and the side wall of the joint is provided with external threads.
As an embodiment of the invention, several of said bit carcasses are of equal size. In the present invention, the drill bit matrix preferably includes primary abrasive, secondary abrasive and filler material therein. In the present invention, the primary abrasive is preferably a TSP material (thermally stable polycrystalline diamond); the particle diameter of the TSP material is preferably 0.42 to 0.9mm, and the TSP material has an arbitrary shape of taper angle. The TSP material used in the invention can be suitable for the working requirement of ultra-high rotation speed technology on deep hard rock stratum, fully exerts good heat resistance and high toughness of the TSP material, and can be used for grinding broken hard rock stratum. The source of the TSP material is not particularly limited in the present invention, and TSP materials of sources well known to those skilled in the art may be selected, and examples thereof are commercially available TSP materials.
In the present invention, the secondary abrasive preferably includes silicon carbide, tungsten carbide, silicon nitride, corundum, and boron carbide; the self-sharpening of the drill bit is realized by using the auxiliary abrasive, so that the main abrasive is easy to expose and is matched with TSP to carry out grinding work. In the present invention, the main material of the secondary abrasive is preferably silicon carbide, and the auxiliary material of the secondary abrasive preferably includes tungsten carbide, silicon nitride, corundum, and boron carbide. The invention does not limit the adding amount of the auxiliary material, and the main material of the auxiliary abrasive is silicon carbide.
According to the invention, the main abrasive and the auxiliary abrasive penetrate through the whole working layer of the drill bit matrix, and the abrasion resistance and the temperature resistance of the drill bit matrix can be improved through the cooperation of the main abrasive and the auxiliary abrasive, so that the drill bit matrix and rock are rubbed to generate heat, the rock is weakened, the rock performance is reduced, the tapping capability is improved, and the low-bit-pressure action requirement is met.
In the present invention, the filler material is preferably a sialon-series ceramic material, more preferably Si 2 N 2 O and Al 2 O 3 The solid solution material is formed. The invention is toSi in the sialon series ceramic material 2 N 2 O and Al 2 O 3 The ratio (d) is not particularly limited, and commercially available materials known to those skilled in the art may be used. The invention utilizes the high wear resistance and high toughness of the filling material, can avoid the drill burning, reduce the influence of the drill jump on the drill bit, promote the temperature resistance of the drill bit matrix, ensure the normal abrasion of deep high-temperature hard stratum, ensure the normal exposure of the abrasive, and avoid the failure caused by the early falling of the main abrasive.
The drill bit matrix is an organic combination of the main abrasive, the auxiliary abrasive and the filling material, so that the thermal stability and the impact resistance of the drill bit can be improved, the slipping problem possibly existing in the process of drilling the drill bit into a deep hard stratum can be solved, and the requirement of an ultra-high-speed drilling technology is met.
In the present invention, all materials are commercially available products well known to those skilled in the art unless specified otherwise.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1-2, the drill bit for ultra-high rotation speed drilling of deep hard stratum in this embodiment comprises a bit body 1, wherein a joint 2 is fixedly connected to the bottom end of the bit body 1, eight bit matrixes 3 which are uniformly distributed along the circumference and have the same size are fixedly arranged at the top end, a space is reserved between two adjacent bit matrixes 3, and a reinforced polycrystalline diamond cutting tooth 4 is fixedly arranged on the working surface of each bit matrix 3; eight reinforced polycrystalline diamond cutting teeth 4 are all the same in orientation and distributed on the circumferences of three concentric circles with different radiuses, referring to fig. 2, the left three reinforced polycrystalline diamond cutting teeth 4 are distributed on the circumference of the concentric circle with a larger radius, the middle two reinforced polycrystalline diamond cutting teeth 4 are distributed on the circumference of the concentric circle with a centered radius, the right three reinforced polycrystalline diamond cutting teeth 4 are distributed on the circumference of the concentric circle with a smaller radius, the radiuses of the three concentric circles differ by 0.5mm in sequence, and thus the arrangement of eight reinforced polycrystalline diamond cutting teeth 4 can increase the width of a furrow when the drill bit drills. Through setting up strenghthened type polycrystalline diamond cutting tooth 4, improved the drill bit and hit the performance of rock, can form the furrow on rock when the drill bit drills, strenghthened type polycrystalline diamond cutting tooth 4 plays certain supporting role, can guarantee simultaneously that to arrange powder and drilling fluid and pass through, the slipping problem when solving hard compact stratum and drilling; the reinforced polycrystalline diamond cutting teeth 4 embedded in the working face of each drill bit matrix 3 are distributed according to certain horizontal and vertical positions, so that the drill bit is guaranteed to have continuous rock cutting capability and can be stably and excessively used, the vibration frequency of the drill bit is reduced, powder discharge and drilling fluid passing are guaranteed, and stick-slip is prevented.
The ultra-high rotation speed drilling bit for deep hard stratum of this embodiment still includes eight gage 5, and every gage 5 all links firmly with the lateral wall of bit matrix 3 and the lateral wall of bit body, and eight gage 5 and eight bit matrix 3 one-to-one, the top of gage 5 and the working face parallel and level of bit matrix 3 have the interval between two adjacent gage 5. The gauge 5 can adapt the drill bit to the stress of deep hard formations and prevent the drill bit from shrinking.
And each gauge 5 is provided with a diversion water channel 6, and the top end of the diversion water channel 6 is flush with the top end of the gauge 5. In the present embodiment, the diversion waterway 6 is a through groove provided on the side wall of the retainer 5. The diverting waterway 6 comprises a vertical portion 61 and a bending portion 62, the top end of the vertical portion 61 is flush with the top end of the gauge 5, the bottom end of the vertical portion 61 is communicated with the top end of the bending portion 62, and the bending portion 62 is inclined downwards and faces the other gauge 5. And the directions of the bending parts 62 in the eight diversion channels 6 are the same, and the width of the bending parts 62 in the same diversion channel 6 is larger than the width of the vertical part 61.
The drill bit body 1 and the joint 2 play a role in connection, the joint 2 is in an inverted cone shape, and external threads are arranged on the side wall of the joint 2.
When the drill bit moves at the ultrahigh rotating speed, the friction between the drill bit and rock can cause a great deal of heat, and through the support of the reinforced polycrystalline diamond cutting teeth 4 and the design of the diversion water channel 6, the circulation of drilling fluid is promoted, and the drilling fluid can flow rapidly through the diversion water channel 6, so that the heat dissipation capacity of the drill bit is improved.
Example two
The embodiment provides a drill bit for deep hard stratum ultrahigh rotation speed drilling, on the basis of the first embodiment, the drill bit for deep hard stratum ultrahigh rotation speed drilling of the embodiment further has the following characteristics: as shown in fig. 3, in this embodiment, the number of drill bit matrix 3 is four, and three reinforced polycrystalline diamond cutting teeth 4 are uniformly fixed on the working surface of each drill bit matrix 3; the orientation of the 12 reinforced polycrystalline diamond cutting teeth 4 is the same and distributed on the same circumference. Eight gage 5 are also included in this embodiment, with the difference that two spaced gage 5 are attached to each carcass sidewall. According to the embodiment, compared with the first embodiment, the number of the drill bit matrix 3 is reduced, the number of the reinforced polycrystalline diamond cutting teeth 4 is increased, the tapping performance of the drill bit is greatly improved on the basis of sacrificing a small amount of heat dissipation capacity, and the drill bit for ultra-high-speed drilling of deep hard strata is suitable for drilling strata with higher hardness.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "top", "bottom", "lower", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The utility model provides a deep hard stratum superhigh speed drill bit for boring which characterized in that: the drill bit comprises a drill bit body, wherein one end of the drill bit body is fixedly connected with a joint, the other end of the drill bit body is fixedly provided with a plurality of drill bit matrixes uniformly distributed along the circumference, a space is reserved between two adjacent drill bit matrixes, and a working surface of each drill bit matrix is fixedly provided with a reinforced polycrystalline diamond cutting tooth; the drill bit also comprises a plurality of gauge protection fixedly connected with the side wall of the drill bit matrix and the side wall of the drill bit body, the plurality of gauge protection corresponds to the plurality of drill bit matrix one by one, the top ends of the gauge protection layers are flush with the working surface of the drill bit matrix, a space is reserved between two adjacent gauge protection layers, a diversion water channel is further arranged on the gauge protection layers, and the top ends of the diversion water channel are flush with the top ends of the gauge protection layers;
a reinforced polycrystalline diamond cutting tooth is fixedly arranged on the working surface of each drill bit matrix, the number of the drill bit matrix is eight, and the eight reinforced polycrystalline diamond cutting teeth are identical in orientation and distributed on the circumferences of three concentric circles with different radiuses;
the drill bit matrix comprises a main abrasive, a secondary abrasive and a filling material, wherein the filling material is Si in a sialon series ceramic material 2 N 2 O and Al 2 O 3 The solid solution material is formed.
2. The ultra-high rotational speed drilling bit for deep hard formations according to claim 1, wherein: the diversion water channel is a through groove arranged on the side wall of the gauge protection.
3. The ultra-high rotational speed drilling bit for deep hard formations according to claim 2, wherein: the shunt water channel comprises a vertical portion and a bending portion, the top end of the vertical portion is flush with the top end of the gauge, the bottom end of the vertical portion is communicated with the top end of the bending portion, and the bending portion is inclined downwards and faces the other gauge.
4. A deep hard formation ultra high speed drill bit according to claim 3, wherein: the directions of the bending parts in the plurality of diversion channels are the same.
5. The ultra-high rotational speed drilling bit for deep hard formations of claim 4, wherein: the width of the bending part is larger than that of the vertical part.
6. The ultra-high rotational speed drilling bit for deep hard formations of claim 5, wherein: the connector is in an inverted cone shape, and external threads are arranged on the side wall of the connector.
7. The ultra-high rotational speed drilling bit for deep hard formations according to claim 1, wherein: the drill bit matrix is equal in size.
8. The ultra-high rotational speed drilling bit for deep hard formations according to claim 1, wherein: the primary abrasive is a TSP material; the secondary abrasive comprises silicon carbide, tungsten carbide, silicon nitride, corundum and boron carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367169.3A CN109989714B (en) | 2019-05-05 | 2019-05-05 | Drill bit for ultra-high rotation speed drilling of deep hard stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367169.3A CN109989714B (en) | 2019-05-05 | 2019-05-05 | Drill bit for ultra-high rotation speed drilling of deep hard stratum |
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| Publication Number | Publication Date |
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| CN109989714A CN109989714A (en) | 2019-07-09 |
| CN109989714B true CN109989714B (en) | 2024-01-23 |
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| CN201910367169.3A Active CN109989714B (en) | 2019-05-05 | 2019-05-05 | Drill bit for ultra-high rotation speed drilling of deep hard stratum |
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| CN112593881B (en) * | 2020-11-30 | 2021-10-26 | 中国地质大学（北京） | Multifunctional shale geological exploration drill bit and working method thereof |
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