CN203742458U - Polycrystalline diamond compact drill bit with six blades - Google Patents
Polycrystalline diamond compact drill bit with six blades Download PDFInfo
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- CN203742458U CN203742458U CN201420093497.1U CN201420093497U CN203742458U CN 203742458 U CN203742458 U CN 203742458U CN 201420093497 U CN201420093497 U CN 201420093497U CN 203742458 U CN203742458 U CN 203742458U
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- main cutting
- wing
- cutting tooth
- drill bit
- wings
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Abstract
The utility model provides a polycrystalline diamond compact drill bit with six blades. The polycrystalline diamond compact drill bit with the six blades comprises a drill bit body, a connector, the blades, main cutting teeth and a spraying nozzle, wherein the main cutting teeth are numbered as a1, a2, a3... with the vertical distance between the main cutting teeth and the central line of the drill bit ranged from large to small, the main cutting teeth from an are sequentially arranged on the six blades, the blade comprising the main cutting tooth an is the blade B1, and the other blades are sequentially numbered as the blades B2, B3, B4, B5 and B6 according to the direction reverse to the rotation direction of the drill bit. The distribution rule of the main cutting teeth from an is as follows: the main cutting teeth an, an+1, an+2, an+3, an+4, an+5, an+6... are circularly and sequentially distributed on the blades B1, B3, B6, B4, B2, B5, B1.... According to the polycrystalline diamond compact drill bit with the six blades, the cutting area of the main cutting teeth is reduced, a cutting blade edge in contact friction with the ground layer is shortened, lateral stress is reduced, and the polycrystalline diamond compact drill bit with the six blades has the technical advantages of being small in torque, high in cutting efficiency, good in stability and long in service life.
Description
Technical field
The utility model relates to a kind of oil and gas well drilling industry, specifically a kind of polycrystalline diamond compact bit of six wings with high-efficient cutting structure.
Background technology
Because world energy sources day is becoming tight, oil and gas well drilling is movable constantly to be increased, so also increasing to the demand of oil and gas well drilling drill bit.Oil and gas well drilling composite polycrystal-diamond (PDC) drill bit, because bit speed is high and long service life, has therefore obtained application extremely widely.
Composite polycrystal-diamond (PDC) drill bit is divided into three wings, the four blade wing, five wings, six wings, seven wings and eight wing PDC drill bits etc. according to drill bit wing quantity, wherein bit speed and the application life of six wing PDC drill bits are moderate, adapt to stratum scope wide, in oil and gas well drilling activity, be widely used.
Taking existing six wing PDC drill bits as example, analyze the cutting structure of existing PDC drill bit:
As shown in Figure 1, composite polycrystal-diamond (PDC) drill bit is mainly made up of drill body 4, jointing 5, wing 2, main cutting tooth 1 and nozzle 3.Composite polycrystal-diamond (PDC) drill bit has 6 wings 2 and multiple main cutting tooth 1(composite polycrystal-diamond), the main cutting tooth 1 of diverse location is arranged on each wing 2 according to specific cutting rule, forms the cutting structure of PDC drill bit.
As shown in Figure 2 to 4, for the cutting structure schematic diagram of existing PDC drill bit, Figure 2 shows that the main cutting tooth 1(composite polycrystal-diamond of existing PDC drill bit) cloth tooth coverage diagram, Figure 3 shows that Z-direction view, represent the main cutting tooth 1 of the diverse location distribution situation on each wing 2, Fig. 4 is the single main cutting tooth of existing PDC drill bit 1(composite polycrystal-diamond) the area of cut and cutting edge limit schematic diagram.Mark CEN is PDC center line of bit, direction of rotation when mark V is PDC drill bit formation drilling, the drilling direction of coordinate system Z axis and the coincidence of PDC center line of bit and sensing PDC drill bit.
The six wing PDC drill bits that general prior art adopts have 3 rimmer knife wings and 3 short sword wings, and several main cutting teeth 1 are distributed on the front wing face of the rimmer knife wing and the short sword wing.6 wings 2 are sequentially defined as to B1, B2, B3, B4, B5 and B6 wing 2 successively along the opposite direction (negative V direction) of bit direction, wherein: B1, B3 and B5 wing 2 are the rimmer knife wing, and B2, B4 and B6 wing 2 are the short sword wing.Again by near described center line of bit (Z axis) vertical distance ascending, be a by main cutting tooth 1 serial number
1, a
2, a
3..., a
nmain cutting tooth a before number
1, a
2a
n-1alternately be arranged in successively on rimmer knife wing B1, B3 and B5; From a
nnumber start, the regularity of distribution of main cutting tooth 1 circulates as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 is arranged in B1, B2, B3, B4, B5, B6, B1 successively ... on number wing 2.So, form the cutting structure of whole existing PDC drill bit according to above-mentioned rule, complete the complete covering of main cutting tooth 1 this regional stratum of cutting.
Defining above-mentioned cutting structure is forward (by wing number ascending order) order cutting structure, and in like manner existing PDC drill bit also has oppositely (pressing wing number descending order) order cutting structure.Reverse sequence cutting structure, due to other reason, is seldom used in actual applications.Because of cutting principle and the forward sequence cutting structure of reverse sequence cutting structure similar, after described in mention no longer separately reverse sequence cutting structure.
As shown in Figure 2, a
nnumber main cutting tooth 1 is the main cutting tooth all standing district of PDC drill bit by the region in PDC drill bit outside, a
nnumber main cutting tooth 1(composite polycrystal-diamond) be the main cutting Chi Fei all standing district of PDC drill bit by the region of PDC drill bit inner side.As can be seen here, in the main cutting tooth 1 all standing district of existing PDC drill bit, its cutting structure is followed forward sequence cutting rule completely; In main cutting Chi Fei all standing district, its cutting structure part is followed forward sequence cutting rule.
As shown in Figure 4, in figure, dash area is a in existing PDC drill bit forward sequence cutting structure
n+1number main cutting tooth 1(composite polycrystal-diamond) the area of cut, in figure, the intersection on dash area and main cutting tooth 1 cutting edge limit is the cutting edge limit that main cutting tooth 1 cuts stratum.Hence one can see that, and the area of cut of this main cutting tooth 1 is excessive, and cutting edge limit is long, must cause whole existing PDC drill bit to have following defect:
1. the area of cut is excessive: cause drill bit operation torque to increase, energy consumption is high, reduces stock-removing efficiency.
2. cutting edge limit is long: cause the frictional heating on main cutting tooth 1 cutting edge limit and stratum to increase, reduce the application life of main cutting tooth 1, the application life of simultaneously reducing whole PDC drill bit.
3. cutting edge limit tilts (as shown in Figure 4) toward drill bit side direction (outside): cause PDC drill bit lateral force to strengthen, reduce the stability of PDC drill bit.
Summary of the invention
For the defect of existing PDC bit cutting structure existence, provide a kind of polycrystalline diamond compact bit of six wings with high-efficient cutting structure.
The technical scheme that the utility model adopts is:
A polycrystalline diamond compact bit for six wings, comprises drill body, jointing, wing, main cutting tooth and nozzle, and the outer end of described wing extends on the outer peripheral face of drill body, inner to bit central linear distance difference; Main cutting tooth is that several are distributed in the composite polycrystal-diamond on the front wing face of wing; By ascending with the vertical distance of described center line of bit, be a by main cutting tooth serial number
1, a
2, a
3, From a
nthe main cutting tooth number starting is arranged sequentially on all six wings successively, sets and comprises a
nthe wing of number main cutting tooth is B1 wing, and is B2, B3, B4, B5, B6 wing by all the other wings by the opposite direction of bit direction successively serial number; From described a
nnumber start the main cutting tooth regularity of distribution as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B3, B6, B4, B2, B5, B1 successively ... on number wing.
From described a
nthe main cutting tooth regularity of distribution number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B5, B2, B4, B6, B3, B1 successively ... on number wing.
From described a
nthe main cutting tooth regularity of distribution number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B4, B2, B6, B3, B5, B1 successively ... on number wing.
From described a
nthe main cutting tooth regularity of distribution number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B5, B3, B6, B2, B4, B1 successively ... on number wing.
The beneficial effect that the utility model produces is:
The polycrystalline diamond compact bit of the utility model six wings, the main cutting tooth on diverse location is arranged according to specific rule, forms distinctive cutting structure; Reduce the area of cut of main cutting tooth, shorten the cutting edge limit of main cutting tooth and stratum contact friction, reduce lateral force; Have moment of torsion little, stock-removing efficiency is high, good stability, the technical advantage of long service life.
The utility model and existing PDC drill bit comparison (under other the same terms), its beneficial effect is:
1. the less single main cutting tooth area of cut, reduces drill bit operation torque, improves bit cutting efficiency.
2. shorter single main cutting tooth cutting edge limit, reduces the frictional heating on main cutting tooth cutting edge limit and stratum, improves the application life of main cutting tooth, thus the application life of improving whole PDC drill bit.
3. reduce the slope trend of single main cutting tooth cutting edge limit toward drill bit side direction (outside), reduce drill bit lateral force, increase the stability of drill bit.
Brief description of the drawings
Fig. 1 is the structural representation of six wing PDC drill bits.
Fig. 2 is that the main cutting tooth cloth tooth of PDC drill bit in prior art covers schematic diagram.
Fig. 3 is the schematic diagram of the Z-direction view of Fig. 2.
Fig. 4 is the area of cut and the cutting edge limit schematic diagram of the single main cutting tooth of PDC drill bit in prior art.
Fig. 5 is that the main cutting tooth cloth tooth of the utility model six wing PDC drill bits covers schematic diagram.
Fig. 6 is that the main cutting tooth cloth tooth of the Z-direction PDC drill bit of Fig. 5 covers schematic diagram.
Fig. 7 is the area of cut and the cutting edge limit schematic diagram of the single main cutting tooth of the utility model six wing PDC drill bit.
Number in the figure represents: 1-main cutting tooth, 2-wing, 3-nozzle, 4-drill body, 5-jointing; a
1, a
2, a
3... for the numbering of main cutting tooth, the numbering that B1～B6 is wing; Z is coordinate system z axle, and CEN is center line of bit, direction of rotation when V is drill bit formation drilling.
Detailed description of the invention
As shown in Fig. 5～7, the utility model is a kind of polycrystalline diamond compact bit of six wings, comprises drill body 4, jointing 5, wing 2, main cutting tooth 1 and nozzle 3.On drill body 4, arrange vertically wing 2, wing 2 on drill body 4 outer peripheral faces decile or not decile arrange.The outer end of wing 2 extends on the outer peripheral face of drill body 4, the inner distance difference to center line of bit CEN, and main cutting tooth 1 is that several are distributed in the composite polycrystal-diamond on the front wing face of wing 2.All wings 2 and all main cutting tooth 1(composite polycrystal-diamond exposed portions serve) form the cutting structure of six wing polycrystalline diamond compact bits of the present utility model.
Drill body 4 can use alloy steel to process by milling machine, is processed into steel body PDC drill bit by six wing polycrystalline diamond compact bits of the present utility model; Drill body 4 also can use tungsten carbide powder, nickel powder, copper alloy to form according to certain ratio high temperature sintering, is processed into tyre case PDC drill.
The cutting edge place of wing 2, be circumferentially provided with the groove that main cutting tooth 1 is installed along drill bit, composite polycrystal-diamond is fixed in the groove at wing 2 cutting edge places by the connected mode of soldering or similar soldering.Main cutting tooth 1(composite polycrystal-diamond) comprise hard alloy substrate and polycrystalline diamond layer, the front wing face of the corresponding wing 2 of end face of polycrystalline diamond layer arranges.
At this, shape and structure to wing 2 do not limit, because the shape of wing 2 can adopt screw type design or linear pattern design, wing 2 height vertically can deeply can be shallow according to designing requirement, the length of wing 2 can be all identical or have long have short.Shape and structure to main cutting tooth 1 do not limit, because main cutting tooth 1 can be various sizes and various shape, its cross section can be circle, ellipse, polygon etc.
Coordinate system Z axis and PDC center line of bit CEN overlap and point to creeping into of the utility model six wing polycrystalline diamond compact bits.
By near center line of bit CEN vertical distance ascending, be a by main cutting tooth 1 serial number
1, a
2, a
3, From a
nnumber start main cutting tooth 1 be arranged sequentially in successively on all six wings 2, i.e. a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5number main cutting tooth 1 is arranged on six wings 2 successively, remaining main cutting tooth 1 cycle arrangement according to this.Setting comprises a
nthe wing 2 of number main cutting tooth 1 is B1 wing 2, and is B2, B3, B4, B5, B6 wing 2 by all the other wings 2 by the opposite direction of bit direction (anti-V direction) successively serial number; From described a
nnumber start main cutting tooth 1 regularity of distribution as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B3, B6, B4, B2, B5, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.（
）
From a
nthe regularity of distribution of the main cutting tooth 1 number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B5, B2, B4, B6, B3, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.（
）
From a
nthe regularity of distribution of the main cutting tooth 1 number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B4, B2, B6, B3, B5, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.（
）
From a
nthe regularity of distribution of the main cutting tooth 1 number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B5, B3, B6, B2, B4, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.（
）
Definition main cutting tooth all standing district:
Cutting blank space on the utility model six any one wing 2 of wing PDC drill bit between any two adjacent main cutting teeth 1, on whole wings 2 relevant positions by remainder, each main cutting tooth 1 covers this blank space of cutting, and on this wing 2, two adjacent regions are main cutting tooth all standing district.
That is to say: on drill body 4 end faces: a
nnumber main cutting tooth 1 circular region is in the outer part the main cutting tooth all standing district of the utility model six wing PDC drill bits, a
nnumber main cutting tooth 1 border circular areas is in the inner part the main cutting Chi Fei all standing district of the utility model six wing PDC drill bits.
In the main cutting tooth all standing district of the utility model six wing PDC drill bits, its cutting structure is followed above-mentioned layout rule completely
~
one of in.In the utility model six wing PDC drill bit main cutting Chi Fei all standing districts, its cutting structure part is followed above-mentioned layout rule
~
one of in.
Here the utility model six wing PDC drill bit main cutting Chi Fei all standing districts are not limited, because this region is near drill bit heart portion, because reasons in structure can be made two wings covering cuttings, also can make three wings or four wings covering cuttings, also the mixing that can make two wings, three wings and four wings covers cutting, and the mixing that also can make two wings, three wings, four wings and five wings covers cutting.
Embodiment mono-
As shown in Fig. 5～Fig. 7, it is the cutting structure schematic diagram of this detailed description of the invention six wing PDC drill bits.Figure 5 shows that the main cutting tooth 1 cloth tooth coverage diagram of the utility model six wing PDC drill bits, Figure 6 shows that the utility model six wing PDC drill bit Z-direction schematic diagrames, the deployment scenarios of the main cutting tooth 1 of expression diverse location on each wing 2.Mark CEN is PDC center line of bit, direction of rotation when mark V is PDC drill bit formation drilling, the drilling direction of coordinate system Z axis and the coincidence of PDC center line of bit and sensing PDC drill bit.
In this detailed description of the invention, 6 wings 2 on six wing PDC drill bits are made up of 3 short sword wings and 3 rimmer knife wings, and the main cutting tooth 1 of its diverse location is arranged on wing 2 by specific rule, specific as follows:
By near center line of bit CEN vertical distance ascending, be a by main cutting tooth 1 serial number
1, a
2, a
3..., a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6..., and from a
nnumber main cutting tooth 1 starts, a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5number main cutting tooth 1 is arranged on six wings 2, remaining main cutting tooth 1 cycle arrangement according to this.Setting comprises a
nthe wing 2 of number main cutting tooth 1 is for B1 wing 2 and be B2, B3, B4, B5, B6 wing 2 by all the other wings 2 by the opposite direction of bit direction (anti-V direction) successively serial number.In this detailed description of the invention, a
nnumber main cutting tooth 1 is arranged in that rimmer knife wing B1 is upper, other wing 2 is respectively along anti-V direction: short sword wing B2, rimmer knife wing B3, short sword wing B4, rimmer knife wing B5 and short sword wing B6.:
From a
nthe regularity of distribution of main cutting tooth 1 number starting is as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B3, B6, B4, B2, B5, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.Rule circulation according to this, finally forms the complete covering of main cutting tooth 1 this regional stratum of cutting.
Embodiment bis-
In this detailed description of the invention, 6 wings 2 on six wing PDC drill bits are made up of 3 short sword wings and 3 rimmer knife wings, and the main cutting tooth 1 of its diverse location is arranged on wing 2 by specific rule, specific as follows:
By near center line of bit CEN vertical distance ascending, be a by main cutting tooth 1 serial number
1, a
2, a
3..., a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6..., and from a
nnumber main cutting tooth 1 starts, a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5number main cutting tooth 1 is arranged on six wings 2, remaining main cutting tooth 1 cycle arrangement according to this.Setting comprises a
nthe wing 2 of number main cutting tooth 1 is for B1 wing 2 and be B2, B3, B4, B5, B6 wing 2 by all the other wings 2 by the opposite direction of bit direction (anti-V direction) successively serial number.:
From a
nthe regularity of distribution of main cutting tooth 1 number starting is as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B5, B2, B4, B6, B3, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.Rule circulation according to this, finally forms the complete covering of main cutting tooth 1 this regional stratum of cutting.
Embodiment tri-
In this detailed description of the invention, 6 wings 2 on six wing PDC drill bits are made up of 3 short sword wings and 3 rimmer knife wings, and the main cutting tooth 1 of its diverse location is arranged on wing 2 by specific rule, specific as follows:
By near center line of bit CEN vertical distance ascending, be a by main cutting tooth 1 serial number
1, a
2, a
3..., a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6..., and from a
nnumber main cutting tooth 1 starts, a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5number main cutting tooth 1 is arranged on six wings 2, remaining main cutting tooth 1 cycle arrangement according to this.Setting comprises a
nthe wing 2 of number main cutting tooth 1 is for B1 wing 2 and be B2, B3, B4, B5, B6 wing 2 by all the other wings 2 by the opposite direction of bit direction (anti-V direction) successively serial number.:
From a
nthe regularity of distribution of main cutting tooth 1 number starting is as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B4, B2, B6, B3, B5, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.Rule circulation according to this, finally forms the complete covering of main cutting tooth 1 this regional stratum of cutting.
Embodiment tetra-
In this detailed description of the invention, 6 wings 2 on six wing PDC drill bits are made up of 3 short sword wings and 3 rimmer knife wings, and the main cutting tooth 1 of its diverse location is arranged on wing 2 by specific rule, specific as follows:
By near center line of bit CEN vertical distance ascending, be a by main cutting tooth 1 serial number
1, a
2, a
3..., a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6..., and from a
nnumber main cutting tooth 1 starts, a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5number main cutting tooth 1 is arranged on six wings 2, remaining main cutting tooth 1 cycle arrangement according to this.Setting comprises a
nthe wing 2 of number main cutting tooth 1 is for B1 wing 2 and be B2, B3, B4, B5, B6 wing 2 by all the other wings 2 by the opposite direction of bit direction (anti-V direction) successively serial number.:
From a
nthe regularity of distribution of main cutting tooth 1 number starting is as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6number main cutting tooth 1 circulates and is arranged in successively B1, B5, B3, B6, B2, B4, B1 ... on number wing 2.Form the cutting structure of the utility model six wing PDC drill bits with this rule circulation.Rule circulation according to this, finally forms the complete covering of main cutting tooth 1 this regional stratum of cutting.
Claims (4)
1. a polycrystalline diamond compact bit for six wings, comprises drill body, jointing, wing, main cutting tooth and nozzle, and the outer end of described wing extends on the outer peripheral face of drill body, inner to bit central linear distance difference; Main cutting tooth is that several are distributed in the composite polycrystal-diamond on the front wing face of wing; It is characterized in that: by ascending with the vertical distance of described center line of bit, be a by main cutting tooth serial number
1, a
2, a
3, From a
nthe main cutting tooth number starting is arranged sequentially on all six wings successively, sets and comprises a
nthe wing of number main cutting tooth is B1 wing, and is B2, B3, B4, B5, B6 wing by all the other wings by the opposite direction of bit direction successively serial number; From described a
nnumber start the main cutting tooth regularity of distribution as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B3, B6, B4, B2, B5, B1 successively ... on number wing.
2. the polycrystalline diamond compact bit of six wings according to claim 1, is characterized in that: from described a
nthe main cutting tooth regularity of distribution number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B5, B2, B4, B6, B3, B1 successively ... on number wing.
3. the polycrystalline diamond compact bit of six wings according to claim 1, is characterized in that: from described a
nthe main cutting tooth regularity of distribution number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B4, B2, B6, B3, B5, B1 successively ... on number wing.
4. the polycrystalline diamond compact bit of six wings according to claim 1, is characterized in that: from described a
nthe main cutting tooth regularity of distribution number starting can also be as follows: a
n, a
n+1, a
n+2, a
n+3, a
n+4, a
n+5, a
n+6the circulation of number main cutting tooth is arranged in B1, B5, B3, B6, B2, B4, B1 successively ... on number wing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093497.1U CN203742458U (en) | 2014-03-04 | 2014-03-04 | Polycrystalline diamond compact drill bit with six blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093497.1U CN203742458U (en) | 2014-03-04 | 2014-03-04 | Polycrystalline diamond compact drill bit with six blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203742458U true CN203742458U (en) | 2014-07-30 |
Family
ID=51342275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420093497.1U Expired - Fee Related CN203742458U (en) | 2014-03-04 | 2014-03-04 | Polycrystalline diamond compact drill bit with six blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203742458U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184502A (en) * | 2022-02-15 | 2022-03-15 | 西南石油大学 | PDC micro-drill bit, rock drillability testing device and method |
-
2014
- 2014-03-04 CN CN201420093497.1U patent/CN203742458U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184502A (en) * | 2022-02-15 | 2022-03-15 | 西南石油大学 | PDC micro-drill bit, rock drillability testing device and method |
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