CN113202419B - Alloy drill bit - Google Patents
Alloy drill bit Download PDFInfo
- Publication number
- CN113202419B CN113202419B CN202110426466.8A CN202110426466A CN113202419B CN 113202419 B CN113202419 B CN 113202419B CN 202110426466 A CN202110426466 A CN 202110426466A CN 113202419 B CN113202419 B CN 113202419B
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- Prior art keywords
- drill bit
- bit body
- drill
- alloy
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000956 alloy Substances 0.000 title claims abstract description 57
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000003359 percent control normalization Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910003468 tantalcarbide Inorganic materials 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- 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
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The application discloses an alloy drill bit, which belongs to the technical field of mechanical equipment and comprises a drill bit body and a drill core; the drill bit comprises a drill bit body, and is characterized in that a drill core is arranged at the front end of the drill bit body, a transmission spline shaft is arranged at the rear end of the drill bit body, a spline sleeve is sleeved outside the transmission spline shaft, the spline sleeve is arranged below a drilling tool through a clamping key assembly, an annular groove is formed in the outer wall of the drill core, and the drill core is coaxial with the drill bit body and is in threaded connection with the bottom of the drill bit body; a clamping ring is arranged between the drill bit body and the spline housing, the clamping ring is fixed on the drill bit body through a fixing pin, a through hole which penetrates through the inside of the transmission spline shaft up and down is formed in the drill bit body, the bottom of the through hole penetrates through the drill bit body and is communicated with an annular groove on the outer wall of the drill core, and a plurality of alloy teeth are arranged on the outer wall of the drill bit body along the circumferential direction of the drill bit body; the application has the advantages of convenient operation, strong practicability and convenient popularization and use, and effectively solves the problems of poor pressure resistance, easy increase of drill bit falling risk and low crushing efficiency of the existing drill bit.
Description
Technical Field
The application relates to the technical field of mechanical equipment, in particular to an alloy drill bit.
Background
The drill bit is applied to the fields of machining, resource exploration, development and the like, but under the condition of complex geological conditions, the problems of reduced mechanical drilling speed, increased drilling cost and the like are solved; the existing drill bit is especially increased along with the increasing of drilling depth, the pressure of drilling fluid column in a shaft is also increased continuously, the pressure resistance of the drill bit is poor easily caused by long-time operation, the risk of falling of the drill bit is increased, and in the drilling process, when the drill bit meets harder stratum or soft and hard interleaving hard interlayer, the drill bit is difficult to eat, and the crushing efficiency is low.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides an alloy drill bit, which effectively solves the problems of poor pressure resistance, easy increase of drill bit falling risk and low crushing efficiency of the existing drill bit.
In order to achieve the above purpose, the application adopts the following technical scheme: an alloy drill bit comprises a drill bit body and a drill core; the drill bit comprises a drill bit body, and is characterized in that a drill core is arranged at the front end of the drill bit body, a transmission spline shaft is arranged at the rear end of the drill bit body, a spline sleeve is sleeved outside the transmission spline shaft, the spline sleeve is arranged below a drilling tool through a clamping key assembly, an annular groove is formed in the outer wall of the drill core, and the drill core is coaxial with the drill bit body and is in threaded connection with the bottom of the drill bit body; the drill bit comprises a drill bit body, a spline sleeve, a transmission spline shaft, a drill bit body, a plurality of alloy teeth, a clamping ring, a fixing pin, a through hole and a plurality of alloy teeth, wherein the clamping ring is arranged between the drill bit body and the spline sleeve, the clamping ring is fixed on the drill bit body through the fixing pin, the through hole which penetrates up and down is formed in the transmission spline shaft, the bottom of the through hole penetrates through the drill bit body and is communicated with an annular groove on the outer wall of the drill core, and the outer wall of the drill bit body is provided with the plurality of alloy teeth along the circumferential direction of the drill bit body.
Further, the alloy teeth are of a column structure, the alloy teeth are uniformly distributed along the circumferential direction of the bit body, and the tops of the alloy teeth are provided with ribs.
Further, the bit body adopts the carbide material, the bit body is round platform shape structure, bit body front end is followed equidistant the being equipped with of circumference of bit body awl button.
Further, the inner wall of the spline housing is provided with a convex strip, and the transmission spline shaft is provided with a matched groove corresponding to the convex strip.
Further, the clamping key assembly adopts semi-ring clamping keys used in pairs, and clamping grooves are formed in the spline housing corresponding to the clamping key assemblies.
Furthermore, the clamping ring is formed by splicing and connecting a first ring body and a second ring body, and the clamping ring is made of hard alloy materials.
The alloy drill bit provided by the application has the following beneficial effects:
the clamping ring is formed by splicing and connecting the first ring body and the second ring body, so that the clamping ring is convenient to detach and replace, and is fixed on the drill bit body through the fixing pin, so that the drill bit is firmly acted, the deformation resistance is improved, and the drill bit is not easy to deform in operation; the clamping ring is made of hard alloy materials, and is arranged between the drill bit body and the spline housing, so that the impact resistance and bending resistance of the drill bit body are effectively improved, and the deformation resistance of the clamping ring alloy drill bit is further improved; the clamping key assembly adopts semi-ring clamping keys used in pairs, and the clamping groove is formed in the transmission spline shaft corresponding to the clamping key assembly, so that the connection stability of the clamping key assembly and the transmission spline shaft is improved, and meanwhile, the power transmission efficiency is improved; through be equipped with the sand grip on the inner wall of spline housing, transmission spline shaft corresponds the sand grip and is equipped with the recess that supporting use, improves the steadiness that spline housing and transmission spline shaft are connected, effectively reduces the risk that the drill bit drops to increase the life of drill bit.
According to the application, the hard alloy material is adopted by the drill bit body, so that the hardness and the wear resistance of the drill bit body are improved, the drill bit body is in a truncated cone-shaped structure, the shock resistance and the compression resistance of the drill bit body are improved, the front end of the drill bit body is provided with conical spherical teeth at equal intervals along the circumferential direction of the drill bit body, the crushing efficiency of the drill bit body is improved, and the practicability of the drill bit body is improved; the drill core is coaxial with the drill bit body and is in threaded connection with the bottom of the drill bit body, so that the drill core is convenient to replace, and the overall service life is prolonged; the alloy teeth are in a column structure and are uniformly distributed along the circumferential direction of the drill bit body, and the tops of the alloy teeth are provided with the ribs, so that the crushing effect of the alloy teeth is improved, and the operation efficiency is improved; through the through hole which is vertically communicated is arranged in the transmission spline shaft, the bottom of the through hole penetrates through the drill bit body and is communicated with the annular groove on the outer wall of the drill core, so that air or medium can enter the drill bit body conveniently to protect the drill bit body, and the operation efficiency of the drill bit is improved; the application has the advantages of convenient operation, strong practicability and convenient popularization and use, and effectively solves the problems of poor pressure resistance, easy increase of drill bit falling risk and low crushing efficiency of the existing drill bit.
Drawings
FIG. 1 is a schematic view of the alloy drill bit according to the present application.
FIG. 2 is a schematic cross-sectional view of a through hole of an alloy drill according to the present application.
FIG. 3 is a schematic view of the structure of the alloy drill rib according to the present application.
FIG. 4 is a schematic structural view of an alloy bit collar of the present application.
In the figure, the bit body is 1-, the drill core is 2-, the snap ring is 3-, the spline shaft is 4-driven, the spline housing is 5-, the key assembly is 6-, the alloy teeth are 7-, the through holes are 8-, the annular grooves are 9-and the conical ball teeth are 10-and the convex strips are 11-and 12-.
Detailed Description
The technical solutions according to the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings, examples of which are shown in the accompanying drawings. When the following description refers to the accompanying drawings, like numerals in the various drawings refer to like or similar elements, unless otherwise specified.
It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
1-4, the alloy drill bit provided by the application comprises a drill bit body 1 and a drill core 2; the drill bit body 1 is made of hard alloy, the hardness and wear resistance of the drill bit body 1 are improved, the hard alloy can be made of the hard alloy with high hardness and high strength by the company, the components of the hard alloy comprise tungsten carbide, cobalt powder, tantalum carbide, chromium carbide and vanadium carbide, the drill bit body 1 is of a round table-shaped structure, the impact resistance and the compression resistance of the drill bit body 1 are improved, conical buttons 10 are arranged at the front end of the drill bit body 1 at equal intervals along the circumferential direction of the drill bit body 1, and the crushing efficiency and the crushing quality of the drill bit in operation are improved.
According to the application, under the condition that the test conditions of impact force, impact frequency, same breaking time (taking continuous operation as a reference) and the like are the same, a round table-shaped structure bit body 1 made of hard alloy materials is subjected to breaking test, and the breaking quality (preferably 8.5-10, 7.0-8.4 and 5.5-6.9) and the wearing condition (the drill core and pick judgment are carried out by a professional by referring to IADC bit wearing grading standards) of the round table-shaped structure bit body are detected, wherein the first control group adopts a non-round table-shaped structure bit made of non-hard alloy materials, the second control group adopts a non-round table-shaped structure bit made of hard alloy materials, the third control group adopts a round table-shaped structure bit made of non-hard alloy materials, and the test results are as follows:
| crushing quality | Wear consumption rate (%) | |
| Bit body of the present application | 9.3 | 0.5-1% |
| Control group I | 5.6 | 18-25% |
| Control group II | 7.2 | 9-14% |
| Control group No. three | 7.6 | 12-17% |
TABLE 1
As can be seen from the test measurement data, the bit body 1 with the truncated cone-shaped structure made of the hard alloy material is superior to the control groups in crushing quality and abrasion condition; the drill bit body 1 with the round table-shaped structure is prepared by adopting the high-hardness and high-strength hard alloy of the company, so that the wear resistance of the drill bit body 1 and the forward breaking effect of the drill bit body 1 are further improved, and the practicability of the drill bit is improved.
The drill bit comprises a drill bit body 1, and is characterized in that a drill core 2 is arranged at the front end of the drill bit body 1, a transmission spline shaft 4 is arranged at the rear end of the drill bit body 1, a spline sleeve 5 is sleeved outside the transmission spline shaft 4, raised strips 11 are arranged on the inner wall of the spline sleeve 5, grooves 12 matched with the raised strips 11 are formed in the transmission spline shaft 4, the connection stability of the spline sleeve 5 and the transmission spline shaft 4 is improved, the falling risk of the drill bit is effectively reduced, and therefore the service life of the drill bit is prolonged; the spline housing 5 is installed in drilling tool below through the key assembly 6, the key assembly 6 adopts the semi-ring key that uses in pairs, plays firm effect to the connecting piece when being convenient for lock connection, strengthens the linking property between, the last draw-in groove that corresponds the key assembly 6 of spline housing 5 improves the steadiness that key assembly 6 and transmission spline shaft 4 are connected, improves power transmission efficiency simultaneously.
The outer wall of the drill core 2 is provided with an annular groove 9, the drill core 2 is coaxial with the drill bit body 1 and is in threaded connection with the bottom of the drill bit body 1, so that the drill core 2 is convenient to replace, and the overall service life is prolonged; a clamping ring 3 is arranged between the bit body 1 and the spline housing 5, so that the impact resistance and bending resistance of the bit body 1 are effectively improved; the clamp ring 3 is formed by splicing and connecting a first ring body and a second ring body, so that the clamp ring 3 is convenient to detach and replace, the clamp ring 3 is made of hard alloy materials, and the clamp ring 3 is fixed on the drill bit body 1 through a fixing pin, so that the drill bit is stable, the deformation resistance is improved, and the drill bit is not easy to deform in work; the inside of the transmission spline shaft 4 is provided with a through hole 8 which is vertically communicated, the bottom of the through hole 8 penetrates through the drill bit body 1 and is communicated with an annular groove 9 on the outer wall of the drill core 2, so that air or medium can enter the drill bit body 1 conveniently to protect the drill bit body 1, and the operation efficiency of the drill bit is improved; the outer wall of the drill bit body 1 is provided with a plurality of alloy teeth 7 along the circumferential direction of the drill bit body 1, the alloy teeth 7 are of column structures, the alloy teeth 7 are uniformly distributed along the circumferential direction of the drill bit body 1, and the tops of the alloy teeth 7 are provided with ribs, so that the crushing effect of the drill bit body is improved, and the operation efficiency is improved.
A clamping ring 3 is arranged between a bit body 1 and a spline housing 5, and the clamping ring 3 is formed by splicing and connecting a first ring body and a second ring body; the control group adopts a sleeved clamping ring, a clamping sleeve clamping ring or a chuck to fix the drill bit after being connected with drilling machine equipment; the deformation resistance and the stability of the joint are measured by adopting a metal deformation resistance testing device, and the stability of the plug connection of the first ring body and the second ring body to equipment connection is better than that of the socket connection snap ring, the clamping sleeve snap ring or the chuck to fix the drill bit after the drill bit is connected with the drilling machine equipment; the anti-deformation performance of the chuck is that the chuck is smaller than the clamping sleeve and the clamping ring is smaller than the sleeved clamping ring, and the clamping ring 3 provided by the application is convenient to detach and replace, and the clamping ring 3 is fixed on the drill bit body 1 through the fixing pin, so that the anti-deformation performance of the drill bit is improved, the drill bit is not easy to deform in operation, and the practicability of the drill bit is improved.
The front end of the drill bit body 1 is provided with conical buttons 10 at equal intervals along the circumferential direction of the drill bit body 1, the outer wall of the drill bit body 1 is provided with a plurality of alloy teeth 7 along the circumferential direction of the drill bit body 1, the alloy teeth 7 are of a column type structure, the alloy teeth 7 are uniformly distributed along the circumferential direction of the drill bit body 1, the top of each alloy tooth 7 is provided with a rib, the outer wall of the drill bit body is provided with a plurality of column type teeth along the circumferential direction of the drill bit body in a comparison group, and the crushing rate and the crushing quality (preferably, the crushing rate and the crushing quality are 8.5-10, the crushing quality are 7.0-8.4, and the crushing quality are 5.5-6.9) are tested under the same conditions of other structures and test operation, and the test data are shown as follows:
| crushing ratio (%) | Crushing quality | Crushing time (S) | |
| Bit body of the present application | 95.6-98.85 | 8.5-9.3 | 60 |
| Control group | 89.7-93.4 | 6.9-7.2 | 120 |
TABLE 2
According to the test data, under the condition that the test conditions are the same, the crushing efficiency and the crushing quality are monitored by adopting the crushing impact system and the crushing detection device of the company, and the drill bit body 1 is superior to the drill bit body provided by the control group in crushing efficiency, quality and crushing time, and the outer wall of the drill bit body is provided with a plurality of column-shaped teeth along the circumferential direction of the drill bit body, so that the drill bit provided by the application can increase the crushing effect on objects, and the working efficiency is improved.
In summary, the alloy drill bit provided by the application is superior to the existing drill bit of the same model in terms of the connection stability performance, crushing quality and efficiency, and therefore the problems of poor pressure resistance, easiness in increasing the risk of drill bit falling and low crushing efficiency of the existing drill bit are further effectively solved.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
The protection scope of the present application is not limited to the specific technical scheme disclosed above, the above description is only a preferred embodiment of the present application, and the present application is not limited thereto, and any minor modification, equivalent replacement and improvement made to the specific technical scheme according to the technical substance of the present application should be included in the protection scope of the technical scheme of the present application.
Claims (4)
1. An alloy drill bit comprises a drill bit body (1) and a drill core (2); the method is characterized in that: the drill bit body (1) is made of hard alloy, the drill bit body (1) is of a truncated cone-shaped structure, and conical buttons (10) are arranged at equal intervals at the front end of the drill bit body (1) along the circumferential direction of the drill bit body (1); the drill bit comprises a drill bit body (1), and is characterized in that a drill core (2) is arranged at the front end of the drill bit body (1), a transmission spline shaft (4) is arranged at the rear end of the drill bit body (1), a spline sleeve (5) is sleeved outside the transmission spline shaft (4), the spline sleeve (5) is arranged below a drilling tool through a clamping key assembly (6), an annular groove (9) is formed in the outer wall of the drill core (2), and the drill core (2) is coaxial with the drill bit body (1) and is in threaded connection with the bottom of the drill bit body (1); be equipped with snap ring (3) between bit body (1) and spline housing (5), snap ring (3) are fixed on bit body (1) through the fixed pin, inside through-hole (8) that link up from top to bottom that are equipped with of transmission spline shaft (4), the bottom of through-hole (8) runs through bit body (1) and communicates with annular groove (9) on the outer wall of core (2), follow on the outer wall of bit body (1) be equipped with a plurality of alloy teeth (7) on the circumference of bit body (1), alloy teeth (7) are the column type structure, alloy teeth (7) are followed the circumference of bit body (1) is evenly arranged, the top of alloy teeth (7) is equipped with the rib.
2. The alloy drill bit according to claim 1, wherein: the inner wall of the spline housing (5) is provided with a convex strip (11), and the transmission spline shaft (4) is provided with a groove (12) which is matched with the convex strip (11).
3. The alloy drill bit according to claim 1, wherein: the clamping key assembly (6) adopts semi-ring clamping keys used in pairs, and clamping grooves are formed in the spline housing (5) corresponding to the clamping key assembly (6).
4. The alloy drill bit according to claim 1, wherein: the clamping ring (3) is formed by splicing a first ring body and a second ring body, and the clamping ring (3) is made of hard alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426466.8A CN113202419B (en) | 2021-04-20 | 2021-04-20 | Alloy drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426466.8A CN113202419B (en) | 2021-04-20 | 2021-04-20 | Alloy drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113202419A CN113202419A (en) | 2021-08-03 |
| CN113202419B true CN113202419B (en) | 2023-10-13 |
Family
ID=77027671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110426466.8A Active CN113202419B (en) | 2021-04-20 | 2021-04-20 | Alloy drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113202419B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203515323U (en) * | 2013-11-12 | 2014-04-02 | 吉林大学 | Rotary percussion-compact drill bit |
| CN110748302A (en) * | 2019-12-04 | 2020-02-04 | 吉林大学 | Split type major diameter air reverse circulation down-the-hole hammer expands end drill bit |
| CN211647993U (en) * | 2020-01-10 | 2020-10-09 | 成都探矿机械厂 | Novel tooth-distribution horizontal directional drilling and reaming drill bit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7637574B2 (en) * | 2006-08-11 | 2009-12-29 | Hall David R | Pick assembly |
| US9469015B2 (en) * | 2013-07-08 | 2016-10-18 | Varel International, Ind., L.P. | Impregnated rotary bit with high density monoblock center structure |
-
2021
- 2021-04-20 CN CN202110426466.8A patent/CN113202419B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203515323U (en) * | 2013-11-12 | 2014-04-02 | 吉林大学 | Rotary percussion-compact drill bit |
| CN110748302A (en) * | 2019-12-04 | 2020-02-04 | 吉林大学 | Split type major diameter air reverse circulation down-the-hole hammer expands end drill bit |
| CN211647993U (en) * | 2020-01-10 | 2020-10-09 | 成都探矿机械厂 | Novel tooth-distribution horizontal directional drilling and reaming drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113202419A (en) | 2021-08-03 |
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