CN105422010A - Polycrystalline diamond compact bit with six blades - Google Patents
Polycrystalline diamond compact bit with six blades Download PDFInfo
- Publication number
- CN105422010A CN105422010A CN201510895240.7A CN201510895240A CN105422010A CN 105422010 A CN105422010 A CN 105422010A CN 201510895240 A CN201510895240 A CN 201510895240A CN 105422010 A CN105422010 A CN 105422010A
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- CN
- China
- Prior art keywords
- bit
- tooth
- teeth
- wing
- angle
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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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
Abstract
The invention provides a polycrystalline diamond compact bit with six blades. The profiles of the three main blades and the profiles of the three auxiliary blades are in a circular arc shape, a small number of cutting teeth are arranged at the positions close to the center of the bit, a large number of cutting teeth are arranged at the positions close to the edge of the bit, the first rows of cutting teeth are tunneling teeth, the second rows of cutting teeth are ploughing teeth, the tops of the tunneling teeth are in a pinnacle shape, and the tops of the pinnacles are inclined towards one side of the center of the bit. Broaching teeth are in a disc shape, and stabilizing teeth are in a strip shape. By means of the arc-shaped design of the blades, the tooth-shape design of the tunneling teeth and the arrangement of the cutting teeth, the bit can initiatively discharge chippings in the tunneling process, the working temperature of the cutting teeth is lowered, the working conditions of the cutting teeth are improved, and the bit balling phenomenon is not likely to occur; by means of the tooth-shape design of the tunneling teeth, the crushing capability of the bit is improved, the centripetal force of the bit is increased, and the drilling quality is improved; meanwhile, all the cutting teeth are evenly stressed, and the service life of the bit is prolonged; by means of the arrangement of the initiative type guiding stabilizing teeth, the guiding performance of the bit is good, and the vortex motion preventing performance of the bit is improved.
Description
Technical field:
The present invention relates to field drilling field of tool, be specifically related to six wing polycrystalline diamond compact bits.
Background technology:
Polycrystalline diamond compact bit is by steel carcass, tungsten carbide sinter layer and the diamond compact composition be arranged on tungsten carbide sinter layer, diamond compact directly affects the performance of drill bit in the cloth tooth of drill bit and the density of tooth, because drill bit is different in whole linear velocity diametrically, each the stressed of cutter tooth diametrically is also not quite similar, operating position residing for each cutter tooth is different, stressed direction impact shock, each cutter tooth stressed make a concerted effort centripetal force whole drill bit also can not be made easily to produce whirling motion by force, if the gage surface of drill bit produces shear action to the borehole wall, can destroy the borehole wall makes drill bit produce horizontal movement, mud drainage slot between wing and wing arranges that improper is also cause spoil disposal not smooth, form the main cause of bit balling.
Summary of the invention:
In order to overcome the deficiency in background technology, the present invention proposes six wing polycrystalline diamond compact bits and solves the problem.
Technical scheme of the present invention is: six wing polycrystalline diamond compact bits, comprise drill body, the drill bit that the semicircle of drill body is spherical extends equally distributed three operator wings and three secondary wings, the profile in three operator wings and three secondary wing cutting faces is circular arc, the center line of this summit, circular arc side and drill body is tangent, this circular arc is contrary with bit direction to the offset direction of drill bit cylindrical side, and three operator wings are similar to cutting face to shape with the trend at three secondary wing back sides; Cloth tooth aspect, the cloth tooth principle of whole wing is, the closer to bit central position, it is fewer that cutting teeth is arranged, more the closer to drill margin position cloth tooth, wherein, cutting teeth is divided into two parts, first row is tunneling gear, and second row is for ploughing into tooth, and each row's cutting teeth is spaced apart; Wherein, tunneling gear top is pinnacle shape composite polycrystal-diamond structure, described pinnacle shape, its top is to bit central lopsidedness, leaning angle c is formed inside the pinnacle shape of tunneling gear and center line of bit, form camber angle d outside the pinnacle shape of tunneling gear and center line of bit, the cutting face that the camber angle of tunneling gear extends is convex structure, plough into tooth be disc-shaped composite polycrystal-diamond;
In such scheme by tunneling gear and ploughing form into tooth between cutting face and center line of bit in drift angle b, in inclination angle a between the cutting face formed by reaming tooth and center line of bit, the cutting face be made up of stable tooth is circular profile, reaming tooth is disc-shaped composite polycrystal-diamond, and stable tooth is that bar shaped composite polycrystal-diamond vertical circumferential is arranged.The operator wing and secondary wing front are equipped with nozzle.The drift angle of tunneling gear is radiussed structure, the leaning angle c of tunneling gear and the scope of camber angle d depend on: when tunneling gear is subject to strata pressure, to act on leaning angle c face and radial direction subitem power on camber angle d face make a concerted effort point to bit central, the axial force acted on leaning angle c and camber angle d face is all positioned at the root of tunneling gear, the scope of described drift angle b is between 135 ~ 155 °, and the scope of described inclination angle a is between 8 ~ 11 °.
Described stable tooth is bar shaped, it is arc surface outside it, stablize between the tangent line between the arc surface of tooth and the drill bit nominal diameter of side, bit direction and arrange in angle e, the exradius that the circular arc opposite side afterbody stablizing tooth is formed is greater than drill bit nominal diameter size f, wherein, the scope of angle e is between 10 ~ 15 °, and the scope of size f is between 0 ~ 2mm.
The present invention has following beneficial effect: by the cambered design of wing, the tooth Shape Design of tunneling gear and the layout of each cutting teeth, make the initiatively chip removal when creeping into of this drill bit, reduce the operating temperature of cutting teeth, the condition of work improving cutting teeth not easily produces mud drum phenomenon, the tooth Shape Design of tunneling gear improves the breaking capacity of drill bit and improves the centripetal force of drill bit, improve and creep into quality, each force on PDC cutter is balanced simultaneously, improve drilling life of bit, the layout of the stable tooth of active guiding makes drill bit guidance quality good, improve the anti-whirling motion performance of drill bit, the compacting borehole wall can be repaired simultaneously, improve drilling quality.
Accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is part elevation figure of accompanying drawing 1;
Accompanying drawing 3 is A-A face sectional drawings of accompanying drawing 2;
Accompanying drawing 4 is partial enlarged drawings of accompanying drawing 3;
Accompanying drawing 5 is elevations of tunneling gear in the present invention;
Accompanying drawing 6 is force diagrams of tunneling gear in the present invention.
1-drill body in figure, 2-operates the wing, and 3-stablizes tooth, 4-reaming tooth, 5-inclination angle a, and 6-ploughs into tooth, 7-tunneling gear, 8-drift angle b, 9-nozzle, 10-angle e, 11-size f, 12-drill bit nominal diameter, 13-leaning angle c, the secondary wing of 14-camber angle d, 15-.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described:
Shown in Fig. 1 composition graphs 2 ~ Fig. 6, six wing polycrystalline diamond compact bits, comprise drill body 1, the drill bit that the semicircle of drill body 1 is spherical extends equally distributed three operator wings 2 and three secondary wings 15, the profile in three operator wings 2 and three secondary wing 15 cutting faces is circular arc, the center line of this summit, circular arc side and drill body 1 is tangent, this circular arc is contrary with bit direction to the offset direction of drill bit cylindrical side, three the operators wing 2 and three secondary wing 15 back sides to move towards shape similar to cutting face; Cloth tooth aspect, the cloth tooth principle of whole wing 2,15 is, the closer to bit central position, it is fewer that cutting teeth is arranged, more the closer to drill margin position cloth tooth, wherein, cutting teeth is divided into two parts, first row is tunneling gear 7, and second row is for ploughing into tooth 6, and each row's cutting teeth is spaced apart; Wherein, tunneling gear 7 top is pinnacle shape composite polycrystal-diamond structure, described pinnacle shape, its top is to bit central lopsidedness, leaning angle c13 is formed inside the pinnacle shape of tunneling gear 7 and center line of bit, form camber angle d14 outside the pinnacle shape of tunneling gear 7 and center line of bit, the cutting face that the camber angle of tunneling gear 7 extends is convex structure, plough into tooth 6 be disc-shaped composite polycrystal-diamond;
By tunneling gear 7 and ploughing form into tooth 6 between cutting face and center line of bit in drift angle b8, in inclination angle a5 between the cutting face formed by reaming tooth 4 and center line of bit, the cutting face be made up of stable tooth 3 is circular profile, reaming tooth 4 is disc-shaped composite polycrystal-diamond, stablizes tooth 3 for bar shaped composite polycrystal-diamond vertical circumferential layout.The operator wing 2 and secondary wing 15 front are equipped with nozzle 9.The drift angle of tunneling gear 7 is radiussed structure, the leaning angle c13 of tunneling gear 7 and the scope of camber angle d14 depend on: when tunneling gear 7 is subject to strata pressure, to act on leaning angle c13 face and radial direction subitem power on camber angle d14 face make a concerted effort point to bit central, the axial force acted on leaning angle c13 and camber angle d14 face is all positioned at the root of tunneling gear 7, the cutting angle that described drift angle b (8) is whole drill bit, according to different stratum, the scope of drift angle b (8) is between 135 ~ 155 °, described inclination angle a (5) is reaming angle, according to different stratum, the scope of inclination angle a (5) is between 8 ~ 11 °.
Described stable tooth 3 is bar shaped, it is arc surface outside it, stablize between the tangent line between the arc surface of tooth 3 and the drill bit nominal diameter 12 of side, bit direction and arrange in angle e10, the exradius that the circular arc opposite side afterbody stablizing tooth 3 is formed is greater than drill bit nominal diameter 12 1 size f11, wherein, angle e10 is the entering angle of stable tooth 3 when wedging the borehole wall, the scope of angle e10 is between 10 ~ 15 °, the size f11 stablizing tooth 3 is the excircle dimension of the interference fits borehole wall, in the process that drill bit creeps into, stablize the effect that tooth 3 pairs of boreholes wall produce compacting and grinding, simultaneously concerning the effect playing guiding whole drill bit, consider the gap between the borehole wall and drill bit, the scope of size f11 is between 0 ~ 2mm.
Designed by wing arc line shaped, make the chip area that formed between wing form the blade wheel structure of centrifugal pump, when drill bit creeps into, rock is cut and is centrifuged power with mud and throws away wing center, forms initiatively chip removal effect.
The camber angle design of tunneling gear makes tunneling gear point to bit central making a concerted effort when cutting suffered by each tunneling gear, drill bit centripetal force when creeping into is stronger, decrease the tendency of drill bit because of various factors generation whirling motion, the design of leaning angle makes tunneling gear stressed more balanced, and it is simultaneously not easily broken that the circular arc cutting face of tunneling gear makes tunneling gear stressed sensing tooth root portion not easily fall tooth.
Tunneling gear angular shape makes tunneling gear cutting face short, stressed little, tunneling gear ploughs to enter to cut rock stratum into heel after making rock stratum produce cracking, during bit, power suffered by from center to cylindrical strengthens gradually, cloth tooth principle designed by the present invention is identical with it, makes each force on PDC cutter evenly and state of wear is more balanced.
Reaming tooth well is expanded qualified to diameter after, the arcwall face stablize tooth produces the effect of compacting to the borehole wall, meanwhile, stablizes the anchor ring that tooth forms and is a bit larger tham the effect that borehole wall diameter also plays guiding, prevent drill bit horizontal movement.
What drift angle b and inclination angle a made whole wing be formed makes a concerted effort to point to bit central, and improve the stability of drill bit, inclination angle a makes reaming tooth cutting force little, without the need to arranging a lot of cutting teeth.
In sum, by the cambered design of wing, the tooth Shape Design of tunneling gear and the layout of each cutting teeth, make the initiatively chip removal when creeping into of this drill bit, reduce the operating temperature of cutting teeth, the condition of work improving cutting teeth not easily produces mud drum phenomenon, the tooth Shape Design of tunneling gear improves the breaking capacity of drill bit and improves the centripetal force of drill bit, improve and creep into quality, each force on PDC cutter is balanced simultaneously, improve drilling life of bit, the layout of the stable tooth of active guiding makes drill bit drill bit guidance quality good, improve the anti-whirling motion performance of drill bit, the compacting borehole wall can be repaired simultaneously, improve drilling quality.
Claims (4)
1. a wing polycrystalline diamond compact bit, comprise drill body (1), it is characterized in that: the drill bit that the semicircle of drill body (1) is spherical extends equally distributed three operators wing (2) and three secondary wings (15), the profile in three operators wing (2) and three secondary wing (15) cutting faces is circular arc, the center line of this summit, circular arc side and drill body (1) is tangent, this circular arc is contrary with bit direction to the offset direction of drill bit cylindrical side, three operators wing (2) are similar to cutting face to shape with the trend at three secondary wing (15) back sides,
Cloth tooth aspect, the cloth tooth principle of whole wing (2,15) is, the closer to bit central position, it is fewer that cutting teeth is arranged, more the closer to drill margin position cloth tooth, wherein, cutting teeth is divided into two parts, first row is tunneling gear (7), and second row is for ploughing into tooth (6), and each row's cutting teeth is spaced apart;
Wherein, tunneling gear (7) top is pinnacle shape composite polycrystal-diamond structure, described pinnacle shape, its top is to bit central lopsidedness, leaning angle c (13) is formed inside the pinnacle shape of tunneling gear (7) and center line of bit, camber angle d (14) is formed outside the pinnacle shape of tunneling gear (7) and center line of bit, the cutting face that the camber angle of tunneling gear (7) extends is convex structure, plough into tooth (6) be disc-shaped composite polycrystal-diamond;
By tunneling gear (7) and ploughing form into tooth (6) between cutting face and center line of bit in drift angle b (8), in inclination angle a (5) between the cutting face formed by reaming tooth (4) and center line of bit, the cutting face be made up of stable tooth (3) is circular profile, reaming tooth (4) is disc-shaped composite polycrystal-diamond, stablizes tooth (3) for bar shaped composite polycrystal-diamond vertical circumferential layout.
2. six wing polycrystalline diamond compact bits according to claim 1, is characterized in that: the operator wing (2) and secondary wing (15) front are equipped with nozzle (9).
3. six wing polycrystalline diamond compact bits according to claim 1, it is characterized in that: the drift angle of tunneling gear (7) is radiussed structure, the leaning angle c (13) of tunneling gear (7) and the scope of camber angle d (14) depend on: when tunneling gear (7) is subject to strata pressure, to act on leaning angle c (13) face and radial direction subitem power on camber angle d (14) face make a concerted effort point to bit central, the axial force acted on leaning angle c (13) and camber angle d (14) face is all positioned at the root of tunneling gear, the scope of described drift angle b (8) is between 135 ~ 155 °, the scope of described inclination angle a (5) is between 8 ~ 11 °.
4. six wing polycrystalline diamond compact bits according to claim 1, it is characterized in that: described stable tooth (3) is bar shaped, it is arc surface outside it, stablize between the tangent line between the arc surface of tooth (3) and the drill bit nominal diameter (12) of side, bit direction and arrange in angle e (10), the exradius that the circular arc opposite side afterbody stablizing tooth (3) is formed is greater than drill bit nominal diameter (12) size f (11), wherein, the scope of angle e (10) is between 10 ~ 15 °, the scope of size f (11) is between 0 ~ 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510895240.7A CN105422010B (en) | 2015-12-08 | 2015-12-08 | Six wing polycrystalline diamond compact bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510895240.7A CN105422010B (en) | 2015-12-08 | 2015-12-08 | Six wing polycrystalline diamond compact bits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422010A true CN105422010A (en) | 2016-03-23 |
| CN105422010B CN105422010B (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510895240.7A Active CN105422010B (en) | 2015-12-08 | 2015-12-08 | Six wing polycrystalline diamond compact bits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422010B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6332503B1 (en) * | 1992-01-31 | 2001-12-25 | Baker Hughes Incorporated | Fixed cutter bit with chisel or vertical cutting elements |
| CN201588553U (en) * | 2010-01-05 | 2010-09-22 | 四川川石金刚石钻头有限公司 | Multifunctional compound drill bit |
| CN203066868U (en) * | 2013-01-25 | 2013-07-17 | 成都西油机械有限公司 | Drill bit structure with three rows of teeth |
| CN203961797U (en) * | 2014-07-30 | 2014-11-26 | 大庆天瑞机械制造有限公司 | Combination tooth polycrystalline diamond compact bit |
| CN204476282U (en) * | 2015-01-29 | 2015-07-15 | 翁朝阳 | A kind of high-performance six wing PDC drill bit |
-
2015
- 2015-12-08 CN CN201510895240.7A patent/CN105422010B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6332503B1 (en) * | 1992-01-31 | 2001-12-25 | Baker Hughes Incorporated | Fixed cutter bit with chisel or vertical cutting elements |
| CN201588553U (en) * | 2010-01-05 | 2010-09-22 | 四川川石金刚石钻头有限公司 | Multifunctional compound drill bit |
| CN203066868U (en) * | 2013-01-25 | 2013-07-17 | 成都西油机械有限公司 | Drill bit structure with three rows of teeth |
| CN203961797U (en) * | 2014-07-30 | 2014-11-26 | 大庆天瑞机械制造有限公司 | Combination tooth polycrystalline diamond compact bit |
| CN204476282U (en) * | 2015-01-29 | 2015-07-15 | 翁朝阳 | A kind of high-performance six wing PDC drill bit |
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| Publication number | Publication date |
|---|---|
| CN105422010B (en) | 2017-08-29 |
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