CN113073942A - Drill bit for drilling - Google Patents
Drill bit for drilling Download PDFInfo
- Publication number
- CN113073942A CN113073942A CN202110305501.0A CN202110305501A CN113073942A CN 113073942 A CN113073942 A CN 113073942A CN 202110305501 A CN202110305501 A CN 202110305501A CN 113073942 A CN113073942 A CN 113073942A
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- China
- Prior art keywords
- sheet
- drill bit
- alloy powder
- drilling
- diamond
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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
- E21B10/46—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
Abstract
The invention discloses a drill bit for drilling, which comprises a tire body and a plurality of tire blocks, wherein the tire blocks are arranged on the tire body; the tyre block comprises a plurality of layers of tyre block sheets which are overlapped along the radial direction of the tyre body, and the tyre block sheets comprise a first sheet and a second sheet; the first sheet and the second sheet are arranged at intervals, and the hardness of the first sheet is higher than that of the second sheet. When the drill bit for drilling is used, a lip surface beneficial to drilling can be formed, the contact area of the drill bit and a rock stratum is reduced, and the drilling pressure and the drilling efficiency are improved; the matrix and the matrix block have good mechanical properties, good formability, lower sintering forming temperature and time, can obviously reduce the thermal damage of diamond in the material, have good bonding force between the diamond and other parts in the material, can effectively avoid the premature exposure of the diamond in use, and prolong the service life of the drill bit from multiple aspects.
Description
Technical Field
The invention relates to the field of drilling construction materials, in particular to a drill bit for drilling.
Background
In drilling operations, the drill bit is the most important tool for directly breaking rock in the formation, and the performance of the drill bit greatly affects the drilling rate and the economic benefit. At present, diamond drill bits are widely used, and generally comprise a steel body and a matrix, wherein a plurality of blocks are arranged on the matrix, and the contact surface of the blocks and an object to be processed is the lip surface of the blocks. In use, the diamond drill bit is slow in speed when drilling medium-abrasive rock strata and reinforced concrete, the service life of the drill bit is short, and the drilling aging and the service life of the drill bit cannot well meet engineering requirements. The main reason is that when the medium and strong abrasive rock stratum and the reinforced concrete are drilled, the drilling machine is pressurized by self weight, the drilling pressure is small, the pressure of the diamond particles on the medium and strong abrasive rock stratum and the reinforced concrete can not reach the pressing-in hardness, and the drill bit can not effectively advance. The diamond bit lip surface has a large contact area with the rock, so that the pressure exerted by the lip surface of the matrix on the rock surface is not enough to break the diamond bit lip surface. Therefore, the drilling efficiency of the drill bit is low, the depth of the diamond cutting into the rock is shallow, the generated rock powder is less, the abrasion to the matrix of the diamond drill bit is small, the diamond can not normally go out of the edge, and the rock breaking effect is poor. The traditional diamond drill bit can not meet the requirements of the existing market in aspects of form, materials and the like, and has the problems of short service life and low time efficiency.
Disclosure of Invention
The invention provides a drill bit for drilling, which is used for solving the technical problems that the structure of the existing drill bit for drilling is unreasonable and the material performance does not reach the standard.
In order to solve the technical problems, the invention adopts the following technical scheme:
a drill bit for drilling comprising a carcass and a plurality of blocks mounted on the carcass; the tyre block comprises a plurality of layers of tyre block sheets which are overlapped along the radial direction of the tyre body, and the tyre block sheets comprise a first sheet and a second sheet; the first sheet and the second sheet are arranged at intervals, and the hardness of the first sheet is higher than that of the second sheet.
The design idea of the technical scheme is that the block sheets with different hardness are arranged at intervals, when the drill bit drills, the abrasion degrees of the block sheets with different hardness are inconsistent, and the block of the drill bit can form a drilling lip surface with high and low intervals, so that the contact area between the drill bit and a rock stratum is reduced, and the drilling pressure and the drilling efficiency are improved.
As a further preferable mode of the above aspect, the block sheet further includes a third sheet provided outside the structure composed of the first sheet and the second sheet, and the third sheet has a higher hardness than the first sheet. The inventor researches and discovers that the outermost and innermost tire block sheets are worn most quickly in the drilling process, so that a third sheet with higher hardness is added on the outer sides of the first sheet and the second sheet in the preferred scheme, the third sheet can ensure that the wearing process of the sheets at all positions of the tire block is consistent with the drilling process on one hand, the stability of the shape of the lip surface of a drill bit in the drilling process is ensured, and on the other hand, the tire block sheets with lower hardness on the inner layer can be protected, so that the problem that the broken teeth of a special-shaped drill bit fall off due to the existence of steel bars in a reinforced concrete pile foundation is avoided, and the service life of the drill bit is prolonged.
In a further preferred embodiment of the present invention, the first sheet has a diamond concentration of 15 to 19%, the second sheet has a diamond concentration of 0, and the third sheet has a diamond concentration of 18 to 22%. According to the optimal scheme, the hardness of different block sheets is adjusted through the concentration of diamond, the optimal range of the concentration of the diamond in each layer of block sheet is determined through multiple tests and repeated researches of the inventor, and the diamond drill bit has the advantages of excellent drilling efficiency, stable drilling lip surface and long service life within the range.
As a further preferred mode of the technical scheme, the first thin slice and the third thin slice are made of iron-based pre-alloy powder, intermediate components, binding materials and diamond powder through cold press molding; the second sheet is made of iron-based pre-alloy powder, intermediate components and bonding materials through cold press molding. According to the preferred scheme, the iron-based pre-alloy powder is used for completely replacing tungsten carbide materials in the prior art to serve as the framework material of the green brick sheet, the advantages of good dispersity and high holding force of the iron-based pre-alloy powder are utilized, the overall hardness and strength of the green brick are improved, the loss increase caused by premature exposure of diamond particles in use is avoided, the production cost of the diamond drill bit, the sintering temperature and the sintering time in the preparation process of the diamond drill bit can be greatly reduced, the thermal damage of diamond is reduced, the good mechanical performance of the diamond drill bit is guaranteed, meanwhile, the cost is greatly reduced, and the service life is prolonged.
As a further preference of the above technical solution, the first sheet comprises the following components in parts by mass: 20-35 parts of iron-based pre-alloy powder, 8-16 parts of intermediate component, 32-40 parts of bonding material and 15-19 parts of diamond powder; the second sheet comprises the following components in parts by weight: 25-45 parts of iron-based pre-alloy powder, 10-20 parts of intermediate component and 40-50 parts of bonding material; the third slice comprises the following components in parts by weight: 20-35 parts of iron-based pre-alloy powder, 8-16 parts of intermediate components, 32-40 parts of bonding materials and 18-22 parts of diamond powder.
Preferably, the diamond powder is artificial diamond, and the granularity of the diamond is 30/50-50/60 meshes. The artificial diamond has high hardness and good wear resistance, and can be widely used for cutting, grinding and drilling. The granularity of the diamond needs to be matched with a concentration and formula system, so that the abrasion synchronism of the diamond and the bonding agent can be ensured, and the maximization of the drilling efficiency and the drilling service life can be realized.
As a further preference of the above technical solution, the iron-based pre-alloy powder comprises Cr-Fe pre-alloy powder and Fe pre-alloy powder; the mass ratio of the Cr-Fe pre-alloy powder to the Fe pre-alloy powder is (4-6): (20-35). The research of the inventor finds that when the pure Fe pre-alloy powder is used as the framework material of the diamond composite material, the wear resistance of the diamond composite material is reduced to a certain degree, so that the wear resistance of the whole material can be improved by utilizing the characteristics of high strength and high wear resistance of the Cr-Fe pre-alloy powder through the matching use of the Cr-Fe pre-alloy powder and the Fe pre-alloy powder. The mass ratio of the Cr-Fe pre-alloy powder to the Fe pre-alloy powder is determined by repeated tests and repeated researches of the inventor, and if the content of the Cr-Fe pre-alloy powder is too high, the material has higher hardness and wear resistance and lower toughness; therefore, the abrasion of the drill bit matrix is too slow in actual use, the diamond cannot be exposed in time, and the cutting effect cannot be effectively exerted.
As a further optimization of the technical scheme, the Fe pre-alloy powder comprises Cu-Fe pre-alloy powder, Ni-Fe-Sn-Cu pre-alloy powder and Cr-Ni-Fe pre-alloy powder, wherein the mass ratio of the Cu-Fe pre-alloy powder to the Ni-Fe-Sn-Cu pre-alloy powder to the Cr-Ni-Fe pre-alloy powder is (2-3): (1-2): (1-2). The Fe pre-alloy powder compounded according to the types and the proportion can ensure that the diamond composite material has the best service performance.
In a further preferred embodiment of the present invention, the intermediate components are Co and Ni, and the binder is 660-Cu and Cu. The intermediate component can improve the mechanical property of the carcass, wherein Ni is mainly used for improving the strength, the wear resistance and the toughness of the carcass, and Co can improve the bending strength of the iron-based carcass.
As a further preferred aspect of the above technical solution, the thickness of the first sheet and the second sheet is 1 to 1.2 mm; the thickness of the third sheet is 1.4-1.6 mm. By defining the difference in the thickness of the different block sheets, the protective effect of the third sheet on the first sheet and the second sheet can be enhanced, and meanwhile, the optimal contact lip surface can be formed by the drill bit in the drilling process.
In a further preferred embodiment of the present invention, the height of the block sheet is 12 to 15mm, and the width of the block sheet is 20 to 23 mm.
Preferably, the matrix sheet is an arc-shaped structure, the plurality of the matrix blocks are distributed along the circumferential direction of the matrix, the matrix sheet has seven layers, and the seven layers of the matrix sheet are equidistantly distributed along the radial direction of the diamond drill bit. The structure can ensure that the abrasion of the drill bit is more uniform, and the service life of the diamond is prolonged.
As a further preferable mode of the above-described means, the compact density (compacted density) of the block sheet is 80% to 90%.
Compared with the prior art, the invention has the advantages that:
(1) when the drill bit for drilling is used, a lip surface beneficial to drilling can be formed, the contact area of the drill bit and a rock stratum is reduced, and the drilling pressure and the drilling efficiency are improved;
(2) the invention optimizes the materials of the matrix and the matrix block of the drill bit, the matrix and the matrix block have good mechanical properties, good formability, lower sintering forming temperature and time, can obviously reduce the heat damage of diamond in the material, has good bonding force between the diamond and other parts in the material, can effectively avoid the premature exposure of the diamond in use, and improves the service life of the drill bit from multiple aspects.
Drawings
FIG. 1 is a schematic structural view of a drill bit according to example 1;
FIG. 2 is a schematic view showing the distribution of blocks on a carcass of the drill bit of example 1;
FIG. 3 is a schematic view of a block of the drill bit of example 1 in a drilling operation;
FIG. 4 is a schematic view of the structure of the drill of example 2;
FIG. 5 is a schematic view of the distribution of blocks on a carcass in example 2.
Illustration of the drawings:
1. a carcass; 2. a block; 3. a block sheet; 4. a first sheet; 5. a second sheet; 6. a third sheet; 7. a steel body.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Example 1:
as shown in fig. 1 and 2, the drill bit for drilling of the present embodiment comprises a steel body 7, a carcass 1 and eight blocks 2, wherein the blocks 2 are mounted on the carcass 1 along the circumferential direction of the carcass 1, each block 2 is composed of seven layers of block sheets 3, and the seven layers of block sheets 3 are distributed in an arc shape along the radial direction of the carcass 1 in an equidistant overlapping manner; wherein the innermost and outermost block sheets 3 are third sheets 6, and the first sheets 4 and the second sheets 5 are arranged between the third sheets 6 at intervals; in the block sheet 3, the third sheet 6 has the highest hardness, the first sheet 4 has the lowest hardness, and the second sheet 5 has the lowest hardness.
In this example, the concentration of diamond in the material of the first sheet 4 was 17%, the concentration of diamond in the second sheet 5 was 0, and the concentration of diamond in the material of the third sheet 6 was 21%.
In this example, the first sheet 4 was made of a composition formed of the following components in parts by mass: 5 parts of Cr-Fe pre-alloy powder, 28 parts of Fe pre-alloy powder (comprising 8 parts of Cu-Fe pre-alloy powder, 8 parts of Ni-Fe-Sn-Cu pre-alloy powder and 12 parts of Cr-Ni-Fe pre-alloy powder), 18 parts of middle components of Ni and Co, 32 parts of bonding materials of Cu and 600-Cu and 17 parts of diamond powder; the second sheet 5 is made of a composition formed by the following components in parts by mass: 5 parts of Cr-Fe pre-alloy powder, 35 parts of Fe pre-alloy powder (comprising 10 parts of Cu-Fe pre-alloy powder, 10 parts of Ni-Fe-Sn-Cu pre-alloy powder and 15 parts of Cr-Ni-Fe pre-alloy powder), 20 parts of middle components of Ni and Co and 40 parts of bonding materials of Cu and 600-Cu; the third sheet 6 is made of a composition formed by the following components in parts by mass: 5 parts of Cr-Fe pre-alloy powder, 26 parts of Fe pre-alloy powder (comprising 8 parts of Cu-Fe pre-alloy powder, 8 parts of Ni-Fe-Sn-Cu pre-alloy powder and 10 parts of Cr-Ni-Fe pre-alloy powder), 16 parts of middle components of Ni and Co, 32 parts of bonding materials of Cu and 600-Cu and 21 parts of diamond powder.
In this embodiment, the first sheet 4 and the second sheet 5 have a thickness of 1mm, and the third sheet 6 has a thickness of 1.4 mm.
In this embodiment, the height of the block sheet 3 is 12mm, and the width of the block sheet 3 is 20 mm.
In this embodiment, the density of the block sheet 3 is 80%.
The manufacturing method of the drill bit for drilling of the embodiment comprises the following steps:
(1) preparing the raw materials of each component of the block slice 3 into metal powder;
(2) pouring metal powder into a mixer, sealing the mixer, putting the mixer into an automatic mixer, adding a clamp to fix a mixing tank, setting the mixing time to be 120min and the rotating speed of the mixer to be 30r/min, pouring the uniformly mixed powder into prepared sample bags after the mixing is finished, numbering and sealing;
(3) cold-pressing and molding the mixture by using a mold to obtain three tire block sheets 3;
(4) radially overlapping the block sheets 3 in a graphite die after cold press molding, filling matrix powder, then placing a drill steel body 7, carrying out hot-press sintering on the semi-finished drill by using a medium-frequency sintering furnace, preserving heat for 5 minutes at the temperature of 950 ℃ and 50KN, preserving heat for 3 minutes at the temperature of 600 ℃ and cooling; and finally, machining the semi-finished drill bit product to finish the manufacture of the finished drill bit product.
Fig. 3 shows the block 2 of the drill bit for drilling according to the present embodiment in the initial drilling operation (in order to better represent the cutting edges of the second, fourth and sixth layers, fig. 3 shows the outermost lamella shortened to actually wear less than the second, fourth and sixth layers), and as shown, each layer is worn to a different extent along the central axis of the drill bit. Because the three-five layers do not contain diamond particles, the abrasion degree of the three-five layers is more serious than that of other layers, so that two grooves are formed, and the two, four and six layers form three cutting edges, so that the free surface of the 2 lip of the block is increased, the contact area between the 2 lip of the block and a rock drilling working surface is reduced, the pressure applied to the rock by the diamond drill bit is increased, and the rock can be more effectively crushed.
Example 2:
as shown in fig. 4-5, the drill bit for drilling of the present embodiment includes a steel body 7, a carcass 1 and eight blocks 2, wherein the carcass 1 is mounted on the steel body 7, and the blocks 2 are mounted on the carcass 1 along the circumferential direction of the carcass 1, wherein each block 2 is composed of five block sheets 3, and the five block sheets 3 are in arc shape and are equidistantly stacked and distributed along the radial direction of the carcass 1; wherein the innermost and outermost block sheets 3 are third sheets 6, and the first sheets 4 and the second sheets 5 are arranged between the third sheets 6 at intervals; in the block sheet 3, the third sheet 6 has the highest hardness, the first sheet 4 has the lowest hardness, and the second sheet 5 has the lowest hardness.
In this example, the concentration of diamond in the material of the first sheet 4 was 15%, the concentration of diamond in the second sheet 5 was 0, and the concentration of diamond in the material of the third sheet 6 was 21%.
In this example, the first sheet 4 was made of a composition formed of the following components in parts by mass: 5 parts of Cr-Fe pre-alloy powder, 28 parts of Fe pre-alloy powder (comprising 8 parts of Cu-Fe pre-alloy powder, 8 parts of Ni-Fe-Sn-Cu pre-alloy powder and 12 parts of Cr-Ni-Fe pre-alloy powder), 18 parts of middle components of Ni and Co, 32 parts of bonding materials of Cu and 600-Cu and 17 parts of diamond powder; the second sheet 5 is made of a composition formed by the following components in parts by mass: 5 parts of Cr-Fe pre-alloy powder, 35 parts of Fe pre-alloy powder (comprising 10 parts of Cu-Fe pre-alloy powder, 10 parts of Ni-Fe-Sn-Cu pre-alloy powder and 15 parts of Cr-Ni-Fe pre-alloy powder), 20 parts of middle components of Ni and Co and 40 parts of bonding materials of Cu and 600-Cu; the third sheet 6 is made of a composition formed by the following components in parts by mass: 5 parts of Cr-Fe pre-alloy powder, 26 parts of Fe pre-alloy powder (comprising 8 parts of Cu-Fe pre-alloy powder, 8 parts of Ni-Fe-Sn-Cu pre-alloy powder and 10 parts of Cr-Ni-Fe pre-alloy powder), 16 parts of middle components of Ni and Co, 32 parts of bonding materials of Cu and 600-Cu and 21 parts of diamond powder.
In this example, the thickness of the first sheet 4 and the second sheet 5 was 1.2mm, and the thickness of the third sheet 6 was 1.5 mm.
In this example, the height of the block sheet 3 is 14mm, and the width of the block sheet 3 is 23 mm.
In this embodiment, the density of the block sheet 3 is 80%.
The drill of this example was prepared by the method described in example 1.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.
Claims (10)
1. A drill bit for drilling, characterized by comprising a carcass (1) and a plurality of blocks (2), said blocks (2) being mounted on the carcass (1); the tyre block (2) comprises a plurality of layers of tyre block sheets (3) which are stacked along the radial direction of the tyre body (1), and the tyre block sheets (3) comprise a first sheet (4) and a second sheet (5); the first sheet (4) and the second sheet (5) are arranged at intervals, and the hardness of the first sheet (4) is higher than that of the second sheet (5).
2. Drill bit for drilling according to claim 1, characterized in that the block lamella (3) further comprises a third lamella (6) arranged outside the structure of the first lamella (4) and the second lamella (5), the third lamella (6) having a higher hardness than the first lamella (4).
3. The drill bit for drilling according to claim 2, characterized in that the concentration of diamond in the material of the first sheet (4) is 15-19%, the concentration of diamond in the second sheet (5) is 0 and the concentration of diamond in the material of the third sheet (6) is 18-22%.
4. Drill bit for drilling according to claim 3, characterized in that said first and third laminae (4, 6) are cold-formed of iron-based pre-alloyed powder, intermediate components, binding material and diamond powder; the second sheet (5) is prepared by cold press molding of iron-based pre-alloy powder, intermediate components and binding materials.
5. The drill bit for drilling according to claim 4, wherein the iron-based pre-alloyed powder comprises Cr-Fe pre-alloyed powder and Fe pre-alloyed powder; the mass ratio of the Cr-Fe pre-alloy powder to the Fe pre-alloy powder is (4-6): (20-35).
6. The drill bit for drilling according to claim 5, wherein the Fe pre-alloy powder comprises Cu-Fe pre-alloy powder, Ni-Fe-Sn-Cu pre-alloy powder and Cr-Ni-Fe pre-alloy powder, and the mass ratio of the Cu-Fe pre-alloy powder, the Ni-Fe-Sn-Cu pre-alloy powder and the Cr-Ni-Fe pre-alloy powder is (2-3): (1-2): (1-2).
7. The drill bit for drilling according to claim 4, wherein the intermediate component is Co and Ni and the binder material is 660-Cu and Cu.
8. The drill bit for drilling according to claim 2, characterized in that the first lamina (4) and the second lamina (5) have a thickness comprised between 1 and 1.2 mm; the thickness of the third sheet (6) is 1.4-1.6 mm.
9. Drill bit for drilling according to any of the claims 1-8, characterized in that the height of the block sheet (3) is 12-15 mm and the width of the block sheet (3) is 20-23 mm.
10. Drill bit for drilling according to any of claims 1-8, characterized in that the block lamella (3) is in an arc-shaped structure and a plurality of blocks (2) are distributed along the circumference of the carcass (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305501.0A CN113073942A (en) | 2021-03-19 | 2021-03-19 | Drill bit for drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305501.0A CN113073942A (en) | 2021-03-19 | 2021-03-19 | Drill bit for drilling |
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| CN113073942A true CN113073942A (en) | 2021-07-06 |
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| CN202110305501.0A Pending CN113073942A (en) | 2021-03-19 | 2021-03-19 | Drill bit for drilling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756724A (en) * | 2021-09-02 | 2021-12-07 | 长沙锐合钻石工具有限公司 | Block type diamond bit for geological exploration and manufacturing process |
| CN115401197A (en) * | 2022-08-17 | 2022-11-29 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated bit manufacturing die, manufacturing method and diamond-impregnated bit |
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| CN113756724A (en) * | 2021-09-02 | 2021-12-07 | 长沙锐合钻石工具有限公司 | Block type diamond bit for geological exploration and manufacturing process |
| CN113756724B (en) * | 2021-09-02 | 2024-01-26 | 长沙锐合钻石工具有限公司 | Block type diamond drill bit for geological exploration and manufacturing process |
| CN115401197A (en) * | 2022-08-17 | 2022-11-29 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated bit manufacturing die, manufacturing method and diamond-impregnated bit |
| CN115401197B (en) * | 2022-08-17 | 2024-01-23 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated drill bit manufacturing die, manufacturing method and diamond-impregnated drill bit |
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