CN104929527B - A kind of drill bit with diamond compact - Google Patents
A kind of drill bit with diamond compact Download PDFInfo
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- CN104929527B CN104929527B CN201510292176.3A CN201510292176A CN104929527B CN 104929527 B CN104929527 B CN 104929527B CN 201510292176 A CN201510292176 A CN 201510292176A CN 104929527 B CN104929527 B CN 104929527B
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- heat pipe
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Abstract
The invention discloses a kind of drill bit with diamond compact, including bit matrix and diamond compact, the diamond compact is welded on bit matrix, the working end of bit matrix has along the circumferential direction been wholely set some supporters, set on supporter fluted, the diamond compact is provided with groove, the diamond compact is higher than 1 mm 5mm of supporter top；There are some first heat pipes, the first heat pipe quantity is identical with supporter and position is corresponding with supporter in the bit matrix；Stretch into the supporter in the first heat pipe top；The second heat pipe is provided with bit matrix center；The second heat pipe lower end is coarser than its upper end；First heat pipe and the second heat pipe near one end of working end be evaporator section, the other end be condensation segment；Liquid-sucking core is provided with the tube wall of the first heat pipe and the second heat pipe, working medium is injected with and by end cap seal in the first heat pipe and the second heat pipe.This drill bit radiating effect is more preferable.
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 that polycrystalline diamond is thin
Layer, bottom is Talide substrate, and diamond compact (PDC) instrument is in geological prospecting, oil drilling, machining
Deng sector application widely.
The technical problem that drill bit with diamond compact is present is：First radiating effect is undesirable, the second diamond
It is between composite sheet and steel bit matrix (bit body) to use adhesives or oxygen and acetylene torch high-temperature soldering more.Used
Diamond compact is also easy to produce " flake " phenomenon in journey, and " flake " is the dominant failure shape of the drill bit with diamond compact
Formula, its reason is loosely caused due to not prison welding or bonding.
It is such due to there are problems that, it is therefore necessary to be improved to the existing drill bit with diamond compact.
The content of the invention
That is designed the invention aims to solve the deficiency of above-mentioned technology is a kind of with having from heat dispersion
The drill bit of diamond compact.
A kind of drill bit with diamond compact designed by the present invention, including bit matrix and diamond compact,
The diamond compact is welded on bit matrix, and the working end of bit matrix has along the circumferential direction been wholely set some supports
Body, sets fluted on supporter, the diamond compact is provided with groove, and the diamond compact is higher than supporter top
Portion 1mm-5mm；There are some first heat pipes, the first heat pipe quantity is identical with supporter and position in the bit matrix
It is corresponding with supporter；Stretch into the supporter in the first heat pipe top；The second heat pipe is provided with bit matrix center；Institute
State the second heat pipe lower end and be coarser than its upper end；First heat pipe and the second heat pipe near one end of working end be evaporator section, the other end be
Condensation segment；Liquid-sucking core is provided with the tube wall of the first heat pipe and the second heat pipe, working medium is injected with the first heat pipe and the second heat pipe
And by end cap seal；Working medium enters into evaporator section in the presence of liquid-sucking core, when the drill bit with diamond compact is used, leans on
The Temperature of Working of nearly working end raises vaporization, and the working medium vaporized under differential pressure action flows to the condensation segment of heat pipe, solidifying in condensation segment
Form liquid and outwardly discharge heat, these are located at the liquid working substance of condensation segment in the presence of liquid-sucking core capillary suction force
Evaporator section is returned to, and vaporization of being heated again, such iterative cycles are realizing the cooling of the drill bit with diamond compact.
The drill bit with diamond compact designed by the present invention, its beneficial effect is：Bit life is long：With Buddha's warrior attendant
Stone composite sheet is main cutting tooth, and the anti-wear performance of composite sheet is more than 20-40 times of hard alloy, and service life is normal drill bit
More than 3-5 times.In the present invention, the first heat pipe and the second heat pipe have the characteristic of circulation cooling, can be by working medium vapour-liquid two
The conversion of state, the high temperature that bit operation end produces is discharged to end, and iterative cycles are realizing the brill with diamond compact
The cooling of head；First heat pipe is corresponding with supporter and the supporter is stretched at top, and the high temperature produced at supporter more holds
Easily shed, and the first heat pipe top stretch into the supporter so that the first heat pipe closer to operating point to improve radiating effect；
And the second heat pipe for being located at middle part then radiates to the central area between supporter, the temperature of reduction working face, and the
Two heat pipe lower ends are coarser than its upper end makes its condensation segment relatively bigger, and evaporator section is relatively smaller, and such structure is easy to working medium to exist
The condensation of condensation segment, also causes that working medium is more easy to negative pressure after evaporator section vaporization, improves circulation cooling effect.This drill bit is using such as
Lower principle radiating：Working medium enters into evaporator section in the presence of liquid-sucking core, when the drill bit with diamond compact is used, is close to
The Temperature of Working of working end raises vaporization, and the working medium vaporized under differential pressure action flows to the condensation segment of heat pipe, is condensed in condensation segment
Heat is discharged into liquid and outwardly, these liquid working substances for being located at condensation segment are returned in the presence of liquid-sucking core capillary suction force
Evaporator section is returned to, and vaporization of being heated again, such iterative cycles are realizing the cooling of the drill bit with diamond compact, radiating
Effect is more preferable.
Further scheme is the present invention：The bit matrix by cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloys, YG8,
Mn is constituted, and the weight portion of each component is：30 parts of cobalt, 5 parts of iron, 2 parts of nickel, 2 parts of tungsten, 11 parts of copper, 1 part of tin, Cu-Re alloys
32 parts, 12 parts, Mn2 parts of YG8.Wherein：Cu-Re alloys are copper-based rare earth alloy, and YG8 is W-Co kind material.Wearability is good,
Use intensity and impact flexibility are better than YG6, all can be from Jiangyan City's dimension moral metal product plant buying.
Further scheme is the present invention：The step that diamond compact is welded on bit matrix is as follows：
Use volumetric concentration is carried out clearly for 99.5% absolute ethyl alcohol to the solder side of diamond compact and bit matrix
Wash；
On bit matrix solder side and on diamond compact solder side smear copper brazing flux, and after by they
It is placed in the heating chamber full of argon gas and heats up, heating room pressure is maintained at 0.5 standard atmospheric pressure, and bit matrix is heated to
650-652 DEG C, and stand 5-10 seconds；
Bit matrix and diamond compact after heating is placed in high-frequency induction heating the welding chamber, temperature control in the welding chamber
At 660-670 DEG C, by copper brazing material and copper brazing flux be added in processed diamond compact and bit matrix solder side it
Between, and using oxygen-acetylene torch heating welding, welding temperature is 670 DEG C.
The welding of diamond compact is carried out using copper brazing material, copper brazing material has excellent brazing manufacturability and wetting
Property, metallurgical interface is with reference to densification, and postwelding surface is smooth, and firm welding can effectively solve the problems, such as flake in the prior art, flake
Rate can decline 15%, extend the service life of drill bit.
Further scheme is the present invention：The copper brazing material is Cu6-Sn5Or Cu3-Sn。
The drill bit with diamond compact designed by the present invention is particularly suitable for geological prospecting.
Brief description of the drawings
Fig. 1 is the schematic appearance of the drill bit that embodiment 1 has diamond compact；
Fig. 2 is the sectional side elevation of the drill bit that embodiment 1 has diamond compact；
Fig. 3 is the sectional side elevation of the drill bit that embodiment 5 has diamond compact；
In figure：Bit matrix 1, diamond compact 2, supporter 3, groove 4, the first heat pipe 5, the second heat pipe 6, evaporator section
7th, condensation segment 8, end cap 10, liquid-sucking core 9, working medium 11.
Specific embodiment
Below by embodiment combination accompanying drawing, the invention will be further described.
Embodiment 1：
As shown in Figure 1, 2, the drill bit with diamond compact described by the present embodiment, including bit matrix 1 and gold
Hard rock composite sheet 2, the diamond compact 2 is welded（Such as use silver brazing）On bit matrix 1, the work of bit matrix 1
End has along the circumferential direction been wholely set some supporters 3, is set on supporter 3 in fluted 4, groove 4 and is provided with the diamond
Composite sheet 2, the diamond compact 2 is higher than the top 1mm of supporter 3；There are some first heat pipes in the bit matrix 1
5, the quantity of the first heat pipe 5 is identical with supporter 3 and position is corresponding with supporter 3；Stretch into institute in the top of first heat pipe 5
State supporter 3；The second heat pipe 6 is provided with the center of bit matrix 1；The lower end of second heat pipe 6 is coarser than its upper end；First heat pipe
5 and second heat pipe 6 near working end one end for the evaporator section 7, other end be condensation segment 8；In the first heat pipe 5 and the second heat pipe 6
Tube wall be provided with liquid-sucking core 9, be injected with working medium 11 in the first heat pipe 5 and the second heat pipe 6 and sealed by end cap 10；In liquid-sucking core
Working medium 11 enters into evaporator section 7 in the presence of 9, when the drill bit with diamond compact is used, near the working medium 11 of working end
Temperature raises vaporization, and the working medium 11 vaporized under differential pressure action flows to the condensation segment 8 of heat pipe, and liquid is condensed into simultaneously in condensation segment 8
Heat is outwardly discharged, these liquid working substances 11 for being located at condensation segment 8 are returned in the presence of the capillary suction force of liquid-sucking core 9
Evaporator section 7, and vaporization of being heated again, such iterative cycles are realizing the cooling of the drill bit with diamond compact.
The drill bit with diamond compact described by the present embodiment, its beneficial effect is：Bit life is long：With gold
Hard rock composite sheet is main cutting tooth, and the anti-wear performance of composite sheet is more than 20-40 times of hard alloy, and service life is common boring
More than 3-5 times of head.In the present invention, the first heat pipe 5 and the second heat pipe 6 have the characteristic of circulation cooling, can be by working medium 11
The conversion of vapour-liquid binary states, the high temperature that bit operation end produces is discharged to end, and iterative cycles are compound with diamond to realize
The cooling of the drill bit of piece；First heat pipe 5 is corresponding with supporter 3 and the supporter 3 is stretched at top, is produced at supporter 3
High temperature be easier to be shed, and the supporter 3 is stretched at the top of the first heat pipe 5 so that the first heat pipe 5 closer to operating point with
Improve radiating effect；And the second heat pipe 6 for being located at middle part then radiates to the central area between supporter 3, work is reduced
The temperature in face, and the lower end of the second heat pipe 6 is coarser than its upper end and makes its condensation segment 8 relatively bigger, and evaporator section 7 is relatively smaller, this
The structure of sample is easy to working medium 11 in the condensation of condensation segment 8, also causes that working medium 11 is more easy to negative pressure after the vaporization of evaporator section 7, and raising is followed
Ring radiating effect.This drill bit is radiated using following principle：Working medium 11 enters into evaporator section 7 in the presence of liquid-sucking core 9, has
When the drill bit of diamond compact is used, the temperature of working medium 11 near working end raises vaporization, the work vaporized under differential pressure action
Matter 11 flows to the condensation segment 8 of heat pipe, condenses into liquid in condensation segment 8 and outwardly discharges heat, and these are located at condensation segment 8
Liquid working substance 11 returns to evaporator section 7 in the presence of the capillary suction force of liquid-sucking core 9, and vaporization of being heated again, so follows repeatedly
Ring is to realize the cooling of the drill bit with diamond compact, and radiating effect is more preferable.
Embodiment 2：
The drill bit with diamond compact described by the present embodiment, as different from Example 1：The bit matrix
1 is made up of cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloys, YG8, Mn, and the weight portion of each component is：30 parts of cobalt, 5 parts of iron, nickel
2 parts, 2 parts of tungsten, 11 parts of copper, 1 part of tin, 32 parts of Cu-Re alloys, 12 parts, Mn2 parts of YG8.
The performance such as following table of the bit matrix 1
| Bending strength MPa | Impact flexibility J | Hardness HRA | Density g/cm3 | |
| The present embodiment bit matrix | 653 | 5.1 | 62 | 9.26 |
| The similar PDC drill bit of in the market | 470 - 647 | 2 - 4.9 | 47 - 60.5 | 8.5 – 10.2 |
It follows that the drill bit with diamond compact described by the present embodiment, bending strength, impact flexibility and
Hardness has obvious advantage compared with similar products, can be improved service life.
Embodiment 3：
The drill bit with diamond compact described by the present embodiment, as different from Example 1：Diamond compact
2 steps being welded on bit matrix 1 are as follows：
Use volumetric concentration is carried out for 99.5% absolute ethyl alcohol to the solder side of diamond compact 2 and bit matrix 1
Cleaning；
On the solder side of bit matrix 1 and on the solder side of diamond compact 2 smear copper brazing flux, and after by it
Be placed in the heating chamber full of argon gas and heat up, heating room pressure is maintained at 0.5 standard atmospheric pressure, by bit matrix 1 plus
Heat stands 5-10 seconds to 650-652 DEG C；Copper brazing flux is preheated in the step；
Bit matrix 1 and diamond compact 2 after heating is placed in high-frequency induction heating the welding chamber, indoor temperature control is welded
Copper brazing material and copper brazing flux are added in processed diamond compact 2 and are welded with bit matrix 1 by system at 660-670 DEG C
Between face, and using oxygen-acetylene torch heating welding, welding temperature is 670 DEG C.
Wherein：The copper brazing material is Cu6-Sn5.Copper brazing flux uses FB301 copper brazing flux, can be from Hebei Qinghe
Wear resistance electrode company buys.
The welding of diamond compact is carried out using copper brazing material, copper brazing material has excellent brazing manufacturability and wetting
Property, metallurgical interface combines fine and close, and postwelding surface is smooth, firm welding, copper brazing flux applied it is front and rear twice, make its distribution more
Uniform abundant, the effect to copper brazing material is more full and uniform；Flake in the prior art can be effectively solved the problems, such as, flake rate can
Decline 15%, extend the service life of drill bit.
Embodiment 4：
The drill bit with diamond compact described by the present embodiment, as different from Example 2：Diamond compact
2 steps being welded on bit matrix 1 are as follows：
Use volumetric concentration is carried out for 99.5% absolute ethyl alcohol to the solder side of diamond compact 2 and bit matrix 1
Cleaning；
On the solder side of bit matrix 1 and on the solder side of diamond compact 2 smear copper brazing flux, and after by it
Be placed in the heating chamber full of argon gas and heat up, heating room pressure is maintained at 0.5 standard atmospheric pressure, by bit matrix 1 plus
Heat stands 5-10 seconds to 650-652 DEG C；
Bit matrix 1 and diamond compact 2 after heating is placed in high-frequency induction heating the welding chamber, indoor temperature control is welded
Copper brazing material and copper brazing flux are added in processed diamond compact 2 and are welded with bit matrix 1 by system at 660-670 DEG C
Between face, and using oxygen-acetylene torch heating welding, welding temperature is 670 DEG C.
Wherein：The copper brazing material is Cu3-Sn。
Embodiment 5：
As shown in figure 3, the drill bit with diamond compact described by the present embodiment, including bit matrix 1 and Buddha's warrior attendant
Stone composite sheet 2, the diamond compact 2 is welded（Such as use silver brazing）On bit matrix 1, the working end of bit matrix 1
Some supporters 3 are along the circumferential direction wholely set, fluted 4 have been set on supporter 3, the diamond have been provided with groove 4 and are answered
Piece 2 is closed, the diamond compact 2 is higher than the top 5mm of supporter 3；There are some first heat pipes 5 in the bit matrix 1,
The quantity of first heat pipe 5 is identical with supporter 3 and position is corresponding with supporter 3；Stretch into described in the top of first heat pipe 5
Supporter 3；First heat pipe 5 is that the evaporator section 7, other end is condensation segment 8 near one end of working end；In the tube wall of the first heat pipe 5
Liquid-sucking core 9 is provided with, working medium 11 is injected with and is sealed by end cap 10 in the first heat pipe 5；The working medium 11 in the presence of liquid-sucking core 9
Evaporator section 7 is entered into, when the drill bit with diamond compact is used, the temperature of working medium 11 near working end raises vaporization,
The working medium 11 vaporized under differential pressure action flows to the condensation segment 8 of heat pipe, condenses into liquid in condensation segment 8 and outwardly discharges heat
Amount, these liquid working substances 11 for being located at condensation segment 8 return to evaporator section 7 in the presence of the capillary suction force of liquid-sucking core 9, and again
It is heated vaporization, such iterative cycles are realizing the cooling of the drill bit with diamond compact.Having described by the present embodiment
The drill bit of diamond compact, the bit matrix 1 is made up of cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloys, YG8, Mn, respectively
The weight portion of component is：30 parts of cobalt, 5 parts of iron, 2 parts of nickel, 2 parts of tungsten, 11 parts of copper, 1 part of tin, 32 parts of Cu-Re alloys, YG8
12 parts, Mn2 parts.
The performance such as following table of the bit matrix 1
| Bending strength MPa | Impact flexibility J | Hardness HRA | Density g/cm3 | |
| The present embodiment bit matrix | 653 | 5.1 | 62 | 9.26 |
| The similar PDC drill bit of in the 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：With gold
Hard rock composite sheet is main cutting tooth, and the anti-wear performance of composite sheet is more than 20-40 times of hard alloy, and service life is common electricity
Plating, more than 3 ~ 5 times of type diamond bit.In the present invention, the first heat pipe 5 has the characteristic of circulation cooling, can be by working medium
The conversion of 11 vapour-liquid binary states, the high temperature that bit operation end produces is discharged to end, and iterative cycles are multiple with diamond to realize
Close the cooling of the drill bit of piece；First heat pipe 5 is corresponding with supporter 3 and the supporter 3 is stretched at top, is produced at supporter 3
Raw high temperature is easier to be shed, and the supporter 3 is stretched at the top of the first heat pipe 5 so that the first heat pipe 5 is closer to operating point
To improve radiating effect；This drill bit is radiated using following principle：Working medium 11 enters into evaporator section 7 in the presence of liquid-sucking core 9,
When drill bit with diamond compact is used, the temperature of working medium 11 near working end raises vaporization, is vaporized under differential pressure action
Working medium 11 flow to the condensation segment 8 of heat pipe, condense into liquid in condensation segment 8 and outwardly discharge heat, these are located at condensation
The liquid working substance 11 of section 8 returns to evaporator section 7 in the presence of the capillary suction force of liquid-sucking core 9, and vaporization of being heated again, so anti-
Multiple to circulate to realize the cooling of the drill bit with diamond compact, radiating effect is more preferable.
Embodiment 6：
The drill bit with diamond compact described by the present embodiment, as different from Example 5：Diamond compact
2 steps being welded on bit matrix 1 are as follows：
Use volumetric concentration is carried out for 99.5% absolute ethyl alcohol to the solder side of diamond compact 2 and bit matrix 1
Cleaning；
On the solder side of bit matrix 1 and on the solder side of diamond compact 2 smear copper brazing flux, and after by it
Be placed in the heating chamber full of argon gas and heat up, heating room pressure is maintained at 0.5 standard atmospheric pressure, by bit matrix 1 plus
Heat stands 5-10 seconds to 650-652 DEG C；
Bit matrix 1 and diamond compact 2 after heating is placed in high-frequency induction heating the welding chamber, indoor temperature control is welded
Copper brazing material and copper brazing flux are added in processed diamond compact 2 and are welded with bit matrix 1 by system at 660-670 DEG C
Between face, and using oxygen-acetylene torch heating welding, welding temperature is 670 DEG C.
Wherein：The copper brazing material is Cu3-Sn。
Above-described embodiment is only to design explanation for example of the invention, it will be apparent that, the protection domain of this patent is not limited
In above-described embodiment.
Various equivalent modifications or supplement that those skilled in the art are made to above-described embodiment, should all fall into this patent
Protection domain.
Claims (1)
1. a kind of drill bit with diamond compact, including bit matrix (1) and diamond compact (2), the diamond
Composite sheet (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), are set fluted (4) on supporter (3), and the diamond compact (2) is provided with groove (4), described
Diamond compact (2) is higher than supporter (3) top 1mm-5mm；There are some first heat pipes (5) in the bit matrix (1),
First heat pipe (5) quantity is identical with supporter (3) and position is corresponding with supporter (3)；First heat pipe (5) top
Stretch into the supporter (3)；The second heat pipe (6) is provided with bit matrix (1) center；Second heat pipe (6) lower end is coarser than
Its upper end；First heat pipe (5) and the second heat pipe (6) near one end of working end be evaporator section (7), the other end be condensation segment (8)；
Liquid-sucking core (9) is provided with the tube wall of the first heat pipe (5) and the second heat pipe (6), is noted in the first heat pipe (5) and the second heat pipe (6)
Enter to have working medium (11) and by end cap (10) sealing；The bit matrix (1) by cobalt, iron, nickel, tungsten, copper, tin, Cu-Re alloys,
YG8, Mn are constituted, and the weight portion of each component is：30 parts of cobalt, 5 parts of iron, 2 parts of nickel, 2 parts of tungsten, 11 parts of copper, 1 part of tin, Cu-Re alloys 32
Part, 12 parts, Mn2 parts of YG8.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104929527A CN104929527A (en) | 2015-09-23 |
| CN104929527B true CN104929527B (en) | 2017-05-31 |
Family
ID=54116921
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN104929527B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120067B (en) * | 2017-06-26 | 2018-09-14 | 吉林大学 | A kind of diamond geological core bit using heat pipe heat radiation |
Citations (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6799648B2 (en) * | 2002-08-27 | 2004-10-05 | Applied Process, Inc. | Method of producing downhole drill bits with integral carbide studs |
-
2015
- 2015-05-29 CN CN201510292176.3A patent/CN104929527B/en active Active
Patent Citations (5)
| 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 |
| 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 |
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| CN104929527A (en) | 2015-09-23 |
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Effective date of registration: 20170503 Address after: 257000 No. two, 750 North Road, Dongying District, Shandong, Dongying Applicant after: Shengli Oil Field is contained pyroxene oil tech Development Co., Ltd Address before: 310051, No. 121 foreshore Road, Hangzhou, Zhejiang, Binjiang District Applicant before: Gao Yuanqin |
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Inventor after: Hang Qingdong Inventor after: Ge Lei Inventor after: Zhang Ximin Inventor after: Wang Qiang Inventor before: Hang Qingdong Inventor before: Wang Qiang |