CN104929527A - Drill bit with diamond compacts - Google Patents
Drill bit with diamond compacts Download PDFInfo
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- CN104929527A CN104929527A CN201510292176.3A CN201510292176A CN104929527A CN 104929527 A CN104929527 A CN 104929527A CN 201510292176 A CN201510292176 A CN 201510292176A CN 104929527 A CN104929527 A CN 104929527A
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- diamond compact
- heat pipe
- bit matrix
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- bit
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Abstract
The invention discloses a drill bit with diamond compacts. The drill bit comprises a bit matrix and the diamond compacts. The diamond compacts are welded on the bit matrix. The operating end of the bit matrix is peripherally and integrally provided with a plurality of supports; each support is provided with a cavity in which one diamond compact is disposed; the diamond compacts are 1mm to 5mm higher than the top of the supports. The bit matrix is internally provided with a plurality of first heat tubes as many as the supports and corresponding to the same in position. The top of each first heat tube extends into the corresponding support. The center of the bit matrix is provided with a second heat tube. The lower end of the second heat tube is thicker than tis upper end. One end, close to the operating end, of each of the first and second heat tubes is provided with an evaporating segment, and the other end thereof is provided with a condensing segment. The wall of each of the first and second heat tubes is provided with an absorbent core; the first and second heat tubes are filled with medium and sealed by end covers. The drill bit can be cooled better.
Description
Technical field
The present invention relates to a kind of drill bit, especially a kind of drill bit with diamond compact.
Background technology
Diamond compact PDC (Polycrystalline Diamond Compact), its top is polycrystalline diamond thin layer, bottom is Talide substrate, and diamond compact (PDC) instrument in sector applications such as geological prospecting, oil drilling, machinings widely.
The technical problem that the drill bit with diamond compact exists is: the first radiating effect is undesirable, adopts adhesives or oxygen and acetylene torch high-temperature soldering between the second diamond compact and steel bit matrix (bit body) more.In use procedure, diamond compact easily produces " flake " phenomenon, and " flake " is the main failure forms of the drill bit with diamond compact, and its reason is due to not prison welding or loosely bonding and cause.
Owing to there is such problem, so be necessary to improve the existing drill bit with diamond compact.
Summary of the invention
The object of the invention is the deficiency in order to solve above-mentioned technology and a kind of drill bit with diamond compact had from heat dispersion designed.
A kind of drill bit with diamond compact designed by the present invention, comprise bit matrix and diamond compact, described diamond compact is welded on bit matrix, the working end of bit matrix has along the circumferential direction been wholely set some supporters, supporter is provided with groove, be provided with described diamond compact in groove, described diamond compact is higher than supporter top 1mm-5mm; There is in described bit matrix some first heat pipes, described first heat pipe quantity and position identical with supporter and supporter corresponding; Described supporter is stretched at described first heat pipe top; The second heat pipe is provided with in bit matrix center; Described second heat pipe lower end is coarser than its upper end; First heat pipe and the second heat pipe are evaporator section near one end of working end, the other end is condensation segment; The tube wall of the first heat pipe and the second heat pipe is provided with liquid-sucking core, is injected with working medium and by end cap seal at the first heat pipe and the second heat pipe; Under the effect of liquid-sucking core, working medium enters into evaporator section, when there is the drill bit use of diamond compact, Temperature of Working near working end raises vaporization, the working medium of vaporizing under differential pressure action flows to the condensation segment of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment, these liquid working substances being positioned at condensation segment turn back to evaporator section under the effect of liquid-sucking core capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact.
The drill bit with diamond compact designed by the present invention, its beneficial effect is: bit life is long: take diamond compact as main cutting tooth, the anti-wear performance of composite sheet be carbide alloy 20-40 doubly more than, application life be normal drill bit 3-5 doubly more than.In the present invention, the first heat pipe and the second heat pipe have the characteristic of circulation cooling, by the conversion of working medium vapour-liquid binary states, the high temperature that bit operation end produces can be released into end, and iterative cycles is to realize the cooling with the drill bit of diamond compact; First heat pipe is corresponding with supporter and described supporter is stretched at top, and the high temperature produced at supporter place is more easily shed, and the first heat pipe top is stretched into described supporter and made the first heat pipe closer to operating point to improve radiating effect; Then dispelled the heat in the central area between supporter at second heat pipe at middle part, reduce the temperature of work plane, and the second heat pipe lower end is coarser than its upper end makes its condensation segment relatively larger, and evaporator section is relatively less, such structure is convenient to the condensation of working medium at condensation segment, also make working medium easier negative pressure after evaporator section vaporization, improve circulation cooling effect.This drill bit utilizes following principle to dispel the heat: under the effect of liquid-sucking core, working medium enters into evaporator section, when there is the drill bit use of diamond compact, Temperature of Working near working end raises vaporization, the working medium of vaporizing under differential pressure action flows to the condensation segment of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment, these liquid working substances being positioned at condensation segment turn back to evaporator section under the effect of liquid-sucking core capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact, and radiating effect is better.
The further scheme of the present invention is: described bit matrix is made up of cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloy, YG8, Mn, and the weight portion of each component is: cobalt 30 parts, iron 5 parts, 2 parts, nickel, 2 parts, tungsten, copper 11 parts, 1 part, tin, Cu-Re alloy 32 parts, YG8 12 parts, Mn2 part.Wherein: Cu-Re alloy is copper base rare earth alloy, YG8 is W-Co kind material.Abrasion resistance is good, and working strength and impact toughness are better than YG6, all can tie up the buying of moral metal product plant from Jiangyan City.
The present invention further scheme is: the step that diamond compact is welded on bit matrix is as follows:
Adopt volumetric concentration be 99.5% the solder side of absolute ethyl alcohol to diamond compact and bit matrix clean;
Copper brazing flux is smeared on bit matrix solder side and on diamond compact solder side, and after they are placed in be full of argon gas heating clamber in heat up, heating clamber internal gas pressure remains on 0.5 standard atmospheric pressure, and bit matrix is heated to 650-652 DEG C, and leaves standstill 5-10 second;
Bit matrix after heating and diamond compact are placed in high-frequency induction heating weldering indoor, weldering interior temperature controls at 660-670 DEG C, bronze braze and copper brazing flux are added between processed diamond compact and bit matrix solder side, and adopting oxygen-acetylene torch to add thermal weld, welding temperature is 670 DEG C.
Adopt bronze braze to carry out the welding of diamond compact, bronze braze has excellent brazing manufacturability and wetability, and metallurgical interface combines fine and close, postwelding smooth surface, firm welding, effectively can solve the problem of flake in prior art, flake rate can decline 15%, extends the application life of drill bit.
The present invention further scheme is: described bronze braze is Cu
6-Sn
5or Cu
3-Sn.
The drill bit with diamond compact designed by the present invention is particularly suitable for geological prospecting.
Accompanying drawing explanation
Fig. 1 is the schematic appearance that embodiment 1 has the drill bit of diamond compact;
Fig. 2 is the sectional side elevation that embodiment 1 has the drill bit of diamond compact;
Fig. 3 is the sectional side elevation that embodiment 5 has the drill bit of diamond compact;
In figure: bit matrix 1, diamond compact 2, supporter 3, groove 4, first heat pipe 5, second heat pipe 6, evaporator section 7, condensation segment 8, end cap 10, liquid-sucking core 9, working medium 11.
Detailed description of the invention
Below by embodiment, the invention will be further described by reference to the accompanying drawings.
Embodiment 1:
As shown in Figure 1, 2, the drill bit with diamond compact described by the present embodiment, comprise bit matrix 1 and diamond compact 2, described diamond compact 2 welds (as adopted silver brazing) on bit matrix 1, the working end of bit matrix 1 has along the circumferential direction been wholely set some supporters 3, supporter 3 is provided with groove 4, is provided with described diamond compact 2 in groove 4, described diamond compact 2 is higher than supporter 3 top 1mm; There is in described bit matrix 1 some first heat pipes 5, described first heat pipe 5 quantity and position identical with supporter 3 and supporter 3 corresponding; Described supporter 3 is stretched at described first heat pipe 5 top; The second heat pipe 6 is provided with in bit matrix 1 center; Described second heat pipe 6 lower end is coarser than its upper end; First heat pipe 5 and the second heat pipe 6 are evaporator section 7 near one end of working end, the other end is condensation segment 8; The tube wall of the first heat pipe 5 and the second heat pipe 6 is provided with liquid-sucking core 9, is injected with working medium 11 at the first heat pipe 5 and the second heat pipe 6 and is sealed by end cap 10; Under the effect of liquid-sucking core 9, working medium 11 enters into evaporator section 7, when there is the drill bit use of diamond compact, working medium 11 temperature near working end raises vaporization, the working medium 11 of vaporizing under differential pressure action flows to the condensation segment 8 of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment 8, these liquid working substances 11 being positioned at condensation segment 8 turn back to evaporator section 7 under the effect of liquid-sucking core 9 capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact.
The drill bit with diamond compact described by the present embodiment, its beneficial effect is: bit life is long: take diamond compact as main cutting tooth, the anti-wear performance of composite sheet be carbide alloy 20-40 doubly more than, application life be normal drill bit 3-5 doubly more than.In the present invention, the first heat pipe 5 and the second heat pipe 6 have the characteristic of circulation cooling, by the conversion of working medium 11 vapour-liquid binary states, the high temperature that bit operation end produces can be released into end, and iterative cycles is to realize the cooling with the drill bit of diamond compact; First heat pipe 5 is corresponding with supporter 3 and described supporter 3 is stretched at top, and the high temperature produced at supporter 3 place is more easily shed, and the first heat pipe 5 top is stretched into described supporter 3 and made the first heat pipe 5 closer to operating point to improve radiating effect; Then dispelled the heat in the central area between supporter 3 at second heat pipe 6 at middle part, reduce the temperature of work plane, and the second heat pipe 6 lower end is coarser than its upper end makes its condensation segment 8 relatively larger, and evaporator section 7 is relatively less, such structure is convenient to the condensation of working medium 11 at condensation segment 8, also make working medium 11 easier negative pressure after evaporator section 7 is vaporized, improve circulation cooling effect.This drill bit utilizes following principle to dispel the heat: under the effect of liquid-sucking core 9, working medium 11 enters into evaporator section 7, when there is the drill bit use of diamond compact, working medium 11 temperature near working end raises vaporization, the working medium 11 of vaporizing under differential pressure action flows to the condensation segment 8 of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment 8, these liquid working substances 11 being positioned at condensation segment 8 turn back to evaporator section 7 under the effect of liquid-sucking core 9 capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact, radiating effect is better.
Embodiment 2:
The drill bit with diamond compact described by the present embodiment, as different from Example 1: described bit matrix 1 is made up of cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloy, YG8, Mn, the weight portion of each component is: cobalt 30 parts, iron 5 parts, 2 parts, nickel, 2 parts, tungsten, copper 11 parts, 1 part, tin, Cu-Re alloy 32 parts, YG8 12 parts, Mn2 part.
Described bit matrix 1 performance is as following table
| Flexural strength MPa | Impact toughness J | Hardness HRA | Density g/cm 3 | |
| The present embodiment bit matrix | 653 | 5.1 | 62 | 9.26 |
| Similar PDC drill bit on market | 470 - 647 | 2 - 4.9 | 47 - 60.5 | 8.5 – 10.2 |
It can thus be appreciated that the drill bit with diamond compact described by the present embodiment, has obvious advantage compared with similar products in flexural strength, impact toughness and hardness, can be improved application life.
Embodiment 3:
The drill bit with diamond compact described by the present embodiment, as different from Example 1: the step that diamond compact 2 is welded on bit matrix 1 is as follows:
Adopt volumetric concentration be 99.5% the solder side of absolute ethyl alcohol to diamond compact 2 and bit matrix 1 clean;
Copper brazing flux is smeared on bit matrix 1 solder side and on diamond compact 2 solder side, and after they are placed in be full of argon gas heating clamber in heat up, heating clamber internal gas pressure remains on 0.5 standard atmospheric pressure, and bit matrix 1 is heated to 650-652 DEG C, and leaves standstill 5-10 second; In this step, copper brazing flux obtains preheating;
Bit matrix 1 after heating and diamond compact 2 are placed in high-frequency induction heating weldering indoor, weldering interior temperature controls at 660-670 DEG C, bronze braze and copper brazing flux are added between processed diamond compact 2 and bit matrix 1 solder side, and adopting oxygen-acetylene torch to add thermal weld, welding temperature is 670 DEG C.
Wherein: described bronze braze is Cu
6-Sn
5.Copper brazing flux adopts FB301 copper brazing flux, can buy from Qinghe, Hebei wear resistance electrode company.
Bronze braze is adopted to carry out the welding of diamond compact, bronze braze has excellent brazing manufacturability and wetability, metallurgical interface combines fine and close, postwelding smooth surface, firm welding, front and back twice executed by copper brazing flux, make it distribute more even abundant, more full and uniform to the effect of bronze braze; Effectively can solve the problem of flake in prior art, flake rate can decline 15%, extends the application life of drill bit.
Embodiment 4:
The drill bit with diamond compact described by the present embodiment, as different from Example 2: the step that diamond compact 2 is welded on bit matrix 1 is as follows:
Adopt volumetric concentration be 99.5% the solder side of absolute ethyl alcohol to diamond compact 2 and bit matrix 1 clean;
Copper brazing flux is smeared on bit matrix 1 solder side and on diamond compact 2 solder side, and after they are placed in be full of argon gas heating clamber in heat up, heating clamber internal gas pressure remains on 0.5 standard atmospheric pressure, and bit matrix 1 is heated to 650-652 DEG C, and leaves standstill 5-10 second;
Bit matrix 1 after heating and diamond compact 2 are placed in high-frequency induction heating weldering indoor, weldering interior temperature controls at 660-670 DEG C, bronze braze and copper brazing flux are added between processed diamond compact 2 and bit matrix 1 solder side, and adopting oxygen-acetylene torch to add thermal weld, welding temperature is 670 DEG C.
Wherein: described bronze braze is Cu
3-Sn.
Embodiment 5:
As shown in Figure 3, the drill bit with diamond compact described by the present embodiment, comprise bit matrix 1 and diamond compact 2, described diamond compact 2 welds (as adopted silver brazing) on bit matrix 1, the working end of bit matrix 1 has along the circumferential direction been wholely set some supporters 3, supporter 3 is provided with groove 4, is provided with described diamond compact 2 in groove 4, described diamond compact 2 is higher than supporter 3 top 5mm; There is in described bit matrix 1 some first heat pipes 5, described first heat pipe 5 quantity and position identical with supporter 3 and supporter 3 corresponding; Described supporter 3 is stretched at described first heat pipe 5 top; First heat pipe 5 is evaporator section 7 near one end of working end, the other end is condensation segment 8; The tube wall of the first heat pipe 5 is provided with liquid-sucking core 9, in the first heat pipe 5, is injected with working medium 11 and is sealed by end cap 10; Under the effect of liquid-sucking core 9, working medium 11 enters into evaporator section 7, when there is the drill bit use of diamond compact, working medium 11 temperature near working end raises vaporization, the working medium 11 of vaporizing under differential pressure action flows to the condensation segment 8 of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment 8, these liquid working substances 11 being positioned at condensation segment 8 turn back to evaporator section 7 under the effect of liquid-sucking core 9 capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact.The drill bit with diamond compact described by the present embodiment, described bit matrix 1 is made up of cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloy, YG8, Mn, and the weight portion of each component is: cobalt 30 parts, iron 5 parts, 2 parts, nickel, 2 parts, tungsten, copper 11 parts, 1 part, tin, Cu-Re alloy 32 parts, YG8 12 parts, Mn2 part.
Described bit matrix 1 performance is as following table
| Flexural strength MPa | Impact toughness J | Hardness HRA | Density g/cm 3 | |
| The present embodiment bit matrix | 653 | 5.1 | 62 | 9.26 |
| Similar PDC drill bit on market | 470 - 647 | 2 - 4.9 | 47 - 60.5 | 8.5 – 10.2 |
The drill bit with diamond compact described by the present embodiment, its beneficial effect is: bit life is long: take diamond compact as main cutting tooth, the anti-wear performance of composite sheet be carbide alloy 20-40 doubly more than, application life be Common platings, more than 3 ~ 5 times of type diamond bit.In the present invention, the first heat pipe 5 has the characteristic of circulation cooling, by the conversion of working medium 11 vapour-liquid binary states, the high temperature that bit operation end produces can be released into end, and iterative cycles is to realize the cooling with the drill bit of diamond compact, first heat pipe 5 is corresponding with supporter 3 and described supporter 3 is stretched at top, and the high temperature produced at supporter 3 place is more easily shed, and the first heat pipe 5 top is stretched into described supporter 3 and made the first heat pipe 5 closer to operating point to improve radiating effect, this drill bit utilizes following principle to dispel the heat: under the effect of liquid-sucking core 9, working medium 11 enters into evaporator section 7, when there is the drill bit use of diamond compact, working medium 11 temperature near working end raises vaporization, the working medium 11 of vaporizing under differential pressure action flows to the condensation segment 8 of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment 8, these liquid working substances 11 being positioned at condensation segment 8 turn back to evaporator section 7 under the effect of liquid-sucking core 9 capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact, radiating effect is better.
Embodiment 6:
The drill bit with diamond compact described by the present embodiment, as different from Example 5: the step that diamond compact 2 is welded on bit matrix 1 is as follows:
Adopt volumetric concentration be 99.5% the solder side of absolute ethyl alcohol to diamond compact 2 and bit matrix 1 clean;
Copper brazing flux is smeared on bit matrix 1 solder side and on diamond compact 2 solder side, and after they are placed in be full of argon gas heating clamber in heat up, heating clamber internal gas pressure remains on 0.5 standard atmospheric pressure, and bit matrix 1 is heated to 650-652 DEG C, and leaves standstill 5-10 second;
Bit matrix 1 after heating and diamond compact 2 are placed in high-frequency induction heating weldering indoor, weldering interior temperature controls at 660-670 DEG C, bronze braze and copper brazing flux are added between processed diamond compact 2 and bit matrix 1 solder side, and adopting oxygen-acetylene torch to add thermal weld, welding temperature is 670 DEG C.
Wherein: described bronze braze is Cu
3-Sn.
Above-described embodiment is only to design of the present invention explanation for example, and significantly, the protection domain of this patent is not limited to above-described embodiment.
The various equivalent modifications or supplementary that those skilled in the art do above-described embodiment, all should fall into the protection domain of this patent.
Claims (4)
1. one kind has the drill bit of diamond compact, comprise bit matrix (1) and diamond compact (2), described diamond compact (2) is welded on bit matrix (1), it is characterized in that the working end of bit matrix (1) has along the circumferential direction been wholely set some supporters (3), supporter (3) is provided with groove (4), be provided with described diamond compact (2) in groove (4), described diamond compact (2) is higher than supporter (3) top 1mm-5mm, there is in described bit matrix (1) some first heat pipes (5), described first heat pipe (5) quantity and position identical with supporter (3) and supporter (3) corresponding, described supporter (3) is stretched at described first heat pipe (5) top, the second heat pipe (6) is provided with in bit matrix (1) center, described second heat pipe (6) lower end is coarser than its upper end, first heat pipe (5) and the second heat pipe (6) are evaporator section (7) near one end of working end, the other end is condensation segment (8), the tube wall of the first heat pipe (5) and the second heat pipe (6) is provided with liquid-sucking core (9), is injected with working medium (11) at the first heat pipe (5) and the second heat pipe (6) and is sealed by end cap (10), under the effect of liquid-sucking core (9), working medium (11) enters into evaporator section (7), when there is the drill bit use of diamond compact, working medium (11) temperature near working end raises vaporization, the working medium (11) of vaporizing under differential pressure action flows to the condensation segment (8) of heat pipe, liquid is condensed into and outwardly releases heat at condensation segment (8), these liquid working substances (11) being positioned at condensation segment (8) turn back to evaporator section (7) under the effect of liquid-sucking core (9) capillary suction force, and vaporization of being again heated, iterative cycles like this is to realize the cooling with the drill bit of diamond compact.
2. the drill bit with diamond compact according to claim 1, it is characterized in that described bit matrix (1) is made up of cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloy, YG8, Mn, the weight portion of each component is: cobalt 30 parts, iron 5 parts, 2 parts, nickel, 2 parts, tungsten, copper 11 parts, 1 part, tin, Cu-Re alloy 32 parts, YG8 12 parts, Mn2 part.
3. the drill bit with diamond compact according to claim 1 and 2, is characterized in that the step that diamond compact (2) is welded on bit matrix (1) is as follows:
Adopt volumetric concentration be 99.5% the solder side of absolute ethyl alcohol to diamond compact (2) and bit matrix (1) clean;
Copper brazing flux is smeared on bit matrix (1) solder side and on diamond compact (2) solder side, and after they are placed in be full of argon gas heating clamber in heat up, heating clamber internal gas pressure remains on 0.5 standard atmospheric pressure, bit matrix (1) is heated to 650-652 DEG C, and leaves standstill 5-10 second;
Bit matrix (1) after heating and diamond compact (2) are placed in high-frequency induction heating weldering indoor, weldering interior temperature controls at 660-670 DEG C, bronze braze and copper brazing flux are added between processed diamond compact (2) and bit matrix (1) solder side, and adopting oxygen-acetylene torch to add thermal weld, welding temperature is 670 DEG C.
4. the drill bit with diamond compact according to claim 3, is characterized in that described bronze braze is Cu
6-Sn
5or Cu
3-Sn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292176.3A CN104929527B (en) | 2015-05-29 | 2015-05-29 | A kind of drill bit with diamond compact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292176.3A CN104929527B (en) | 2015-05-29 | 2015-05-29 | A kind of drill bit with diamond compact |
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| Publication Number | Publication Date |
|---|---|
| CN104929527A true CN104929527A (en) | 2015-09-23 |
| CN104929527B CN104929527B (en) | 2017-05-31 |
Family
ID=54116921
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292176.3A Active CN104929527B (en) | 2015-05-29 | 2015-05-29 | A kind of drill bit with diamond compact |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120067A (en) * | 2017-06-26 | 2017-09-01 | 吉林大学 | A kind of diamond geological core bit of utilization heat pipe heat radiation |
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|---|---|---|---|---|
| US4334585A (en) * | 1980-07-14 | 1982-06-15 | Smith International, Inc. | Insert retention and cooling apparatus for drag bits |
| US4499958A (en) * | 1983-04-29 | 1985-02-19 | Strata Bit Corporation | Drag blade bit with diamond cutting elements |
| CN2570436Y (en) * | 2002-06-05 | 2003-09-03 | 邵兴新 | Casing of bit head |
| US20040040752A1 (en) * | 2002-08-27 | 2004-03-04 | Brandenberg Kristin R | Method of producing downhole drill bits with integral carbide studs |
| CN102086757A (en) * | 2010-10-23 | 2011-06-08 | 李仕清 | Composite cutting drill |
| CN201865583U (en) * | 2010-11-23 | 2011-06-15 | 通化市远通石油机械有限责任公司 | High-efficiency three-scraper drill bit |
-
2015
- 2015-05-29 CN CN201510292176.3A patent/CN104929527B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4334585A (en) * | 1980-07-14 | 1982-06-15 | Smith International, Inc. | Insert retention and cooling apparatus for drag bits |
| US4499958A (en) * | 1983-04-29 | 1985-02-19 | Strata Bit Corporation | Drag blade bit with diamond cutting elements |
| CN2570436Y (en) * | 2002-06-05 | 2003-09-03 | 邵兴新 | Casing of bit head |
| US20040040752A1 (en) * | 2002-08-27 | 2004-03-04 | Brandenberg Kristin R | Method of producing downhole drill bits with integral carbide studs |
| CN102086757A (en) * | 2010-10-23 | 2011-06-08 | 李仕清 | Composite cutting drill |
| CN201865583U (en) * | 2010-11-23 | 2011-06-15 | 通化市远通石油机械有限责任公司 | High-efficiency three-scraper drill bit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120067A (en) * | 2017-06-26 | 2017-09-01 | 吉林大学 | A kind of diamond geological core bit of utilization heat pipe heat radiation |
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| CN104929527B (en) | 2017-05-31 |
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