CN104074465A - Drill bit for scraper cutting roller cone - Google Patents
Drill bit for scraper cutting roller cone Download PDFInfo
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- CN104074465A CN104074465A CN201410324372.XA CN201410324372A CN104074465A CN 104074465 A CN104074465 A CN 104074465A CN 201410324372 A CN201410324372 A CN 201410324372A CN 104074465 A CN104074465 A CN 104074465A
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- drill bit
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- drill body
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Abstract
The invention relates to a drill bit for a scraper cutting roller cone. The drill bit comprises a screw rod (4) and a screw rod drill bit body (9), wherein the drill bit body (9) is connected with the screw rod (4) through a circular arc transition section connecting part (5); the radian of the circular arc transition section connecting part (5) is 70 to 80 degrees; the drill bit body (9) is of a hemispherical structure; wear-resistant roller cones (1) are uniformly distributed on the arc-shaped upper surface and are concretely made of the following hard alloy ingredients in percentage by mass: 50 to 60 percent of Co, 10 to 30 percent of Ni, 20 to 40 percent of C and the balance Cu, in addition, the total amount of impurities is not greater than 0.45 percent, and the total mass percent is 100 percent; a plurality of scraper cutting driving grooves (2) are formed in the surface of the drill bit body (9) in a radial way, wherein a symmetrical line A (7) of the driving groove (2) positioned in the maximum circle position of the drill bit body (9) forms 20 to 40-degree included angles with two symmetrical lines B (8) and two symmetrical lines C (6) adjacent to the symmetrical line A (7); and the included angle formed between the symmetrical lines B (8) and the horizontal line, and the included angles formed between the symmetrical lines C (6) and the horizontal line are respectively 60 to 80 degrees; and a screw thread connecting part (3) is arranged on the screw rod (4).
Description
Technical field
The present invention relates to a kind of drill bit, relate in particular to a kind of drill bit for scraper cutting gear wheel that oil and gas development drilling well is used.
Background technology
Bearing ubiquity carbide alloy module hardness is low, the shortcoming such as hard module easily comes off and abrasion resistance properties is poor.The performance of the journal bearing in helicoid hydraulic motor directly has influence on the application life of screw drill, and its working environment is disliked slightly, when work, is covered with high temperature mud around, therefore requires bearing to have good steadiness, abrasion resistance and shock resistance.Prior art once disclosed a kind of helicoid hydraulic motor bearing, and it is provided with hard alloy layer and supersonic speed thermally sprayed coating on bearing inner sleeve, and because wearing layer is MULTILAYER COMPOSITE, its processing cost is high, and difficulty of processing is large.
In existing drill bit apparatus, obviously have following defect in addition, drill bit hardness does not reach requirement, can not creep into efficiently, the chip of scraper cutting is outwards carried in can not be between unit, and drilling efficiency is not high.
Summary of the invention
In order to overcome the shortcoming existing in above-mentioned prior art, the invention provides a kind of drill bit for scraper cutting gear wheel, wearing layer hardness is high, good toughness, wear-resisting of long duration, be combined firmly screw drill bearing with steel matrix; And this drill bit has advantages of that drilling efficiency is high.
In order to solve the problems of the technologies described above, the technical scheme adopting is: a kind of drill bit for scraper cutting gear wheel, described drill bit comprises screw rod, screw rod drill body, described drill body is connected by arc transition section connecting portion with described screw rod, the radian of described arc transition section connecting portion is 70-80 degree, described drill body is hemispherical structure, in curved upper surface, be evenly equipped with wear-resisting gear wheel, described gear wheel is that carbide alloy becomes to be grouped into, it specifically consists of by mass percentage: the Co of 50-60%, the Ni of 10-30%, the C of 20-40%, surplus is copper, and total impurities is not more than 0.45%, gross mass percentage sum is 100%, radially on the surface of described drill body offer the cutting of some scrapers and drive grooves, described driving groove is all S shape curve, extend and be radial to external surface from the bottom of described drill body, described bottom refers to that described drill body and described screw rod connecting portion are described arc transition section connecting portion, wherein being positioned at two line of symmetry B that the line of symmetry A of described driving groove at the greatest circle shaped position place of described drill body is adjacent with described line of symmetry A and the angle of two line of symmetry C is 20-40 degree, and described line of symmetry B and two line of symmetry C and horizontal angle are 60-80 degree, on screw rod, there is threaded joints.
Preferably, described gear wheel is that carbide alloy becomes to be grouped into, and it specifically consists of by mass percentage: 50% Co, and 10% Ni, 30% C, surplus is copper, and total impurities is not more than 0.45%, gross mass percentage sum is 100%.
Preferably, described gear wheel is that carbide alloy becomes to be grouped into, and it specifically consists of by mass percentage: 55% Co, and 20% Ni, 25% C, and total impurities is not more than 0.45%, and gross mass percentage sum is 100%.
Preferably, being positioned at two line of symmetry B that the line of symmetry A of described driving groove at the greatest circle shaped position place of described drill body is adjacent with described line of symmetry A and the angle of two line of symmetry C is 20 degree, and described line of symmetry B and two line of symmetry C and horizontal angle are 60 degree.
Preferably, the radian of described arc transition section connecting portion is 80 degree.
Technique effect
Advantage and good effect that the present invention has are:
1, the rich surface cobalt Ultra-fine Grained gradient hard alloy hardness that the present invention prepares is higher, and wear-resisting personality is better.
2, the ultra-fine cemented carbide matrix of rich surface cobalt of the present invention, the more conventional carbide alloy of its toughness and abrasion resistance is high.
3, to have optimized carbide alloy and steel body body be that the combination of drill body is more firm in the present invention, difficult drop-off.
4, bearing internal external sleeve, all with wearing layer, makes bearing more sturdy and durable.
6, the present invention adopts the driving groove of S type, extends and is radial to external surface from the bottom of described drill body, has increased widely and has driven the transmission efficiency of the chip of cutting, and can not cause because of groove the reduction of drilling tool hardness.
Brief description of the drawings
Fig. 1 is the schematic diagram of drill bit of the present invention.
Detailed description of the invention
Embodiment 1
A kind of drill bit for scraper cutting gear wheel, described drill bit comprises screw rod 4, screw rod drill body 9, described drill body 9 is connected by arc transition section connecting portion 5 with described screw rod 4, the radian of described arc transition section connecting portion 5 is 80 degree, described drill body 9 is hemispherical structure, in curved upper surface, be evenly equipped with wear-resisting gear wheel 1, described gear wheel 1 for carbide alloy become be grouped into, it specifically consists of by mass percentage: 50% Co, 30% Ni, 20% C, and total impurities is not more than 0.45%, gross mass percentage sum is 100%; Radially on the surface of described drill body 9 offer the cutting of some scrapers and drive grooves 2, described driving groove 2 is all S shape curve, extend and be radial to external surface from the bottom of described drill body 9, described bottom refers to that described drill body 9 is described arc transition section connecting portion 5 with described screw rod 4 connecting portions; Wherein being positioned at two line of symmetry B8 that the line of symmetry A7 of described driving groove 2 at the greatest circle shaped position place of described drill body 9 is adjacent with described line of symmetry A7 and the angle of two line of symmetry C6 is 40 degree, and described line of symmetry B8 and two line of symmetry C6 and horizontal angle are 60 degree; On screw rod 4, there is threaded joints 3.
Embodiment 2
A kind of drill bit for scraper cutting gear wheel, described drill bit comprises screw rod 4, screw rod drill body 9, described drill body 9 is connected by arc transition section connecting portion 5 with described screw rod 4, the radian of described arc transition section connecting portion 5 is 75 degree, described drill body 9 is hemispherical structure, is evenly equipped with wear-resisting gear wheel 1 in curved upper surface; Radially on the surface of described drill body 9 offer the cutting of some scrapers and drive grooves 2, described driving groove 2 is all S shape curve, extend and be radial to external surface from the bottom of described drill body 9, described bottom refers to that described drill body 9 is described arc transition section connecting portion 5 with described screw rod 4 connecting portions; Wherein being positioned at two line of symmetry B8 that the line of symmetry A7 of described driving groove 2 at the greatest circle shaped position place of described drill body 9 is adjacent with described line of symmetry A7 and the angle of two line of symmetry C6 is 20 degree, and described line of symmetry B8 and two line of symmetry C6 and horizontal angle are 70 degree; On screw rod 4, there is threaded joints 3; Described gear wheel 1 becomes to be grouped into for carbide alloy, and it specifically consists of by mass percentage: 50% Co, and 10% Ni, 30% C, surplus is copper, and total impurities is not more than 0.45%, gross mass percentage sum is 100%.
By embodiment 1 and 2, the mechanical property of its drilling efficiency and drill bit to be tested, concrete outcome is in table 1.
Table 1: performance test table
As can be seen from the above table, the indices of drill bit of the present invention is obviously better than plain bearing of the prior art, and drilling efficiency improves greatly, has exceeded those skilled in the art's expection level completely.
Claims (5)
1. the drill bit for scraper cutting gear wheel, it is characterized in that: described drill bit comprises screw rod (4), screw rod drill body (9), described drill body (9) is connected by arc transition section connecting portion (5) with described screw rod (4), the radian of described arc transition section connecting portion (5) is 70-80 degree, described drill body (9) is hemispherical structure, in curved upper surface, be evenly equipped with wear-resisting gear wheel (1), described gear wheel (1) for carbide alloy become be grouped into, it specifically consists of by mass percentage: the Co of 50-60%, the Ni of 10-30%, the C of 20-40%, surplus is copper, and total impurities is not more than 0.45%, gross mass percentage sum is 100%, radial some the scraper cutting driving grooves (2) that offer on the surface of described drill body (9), described driving groove (2) is all S shape curve, extend and be radial to external surface from the bottom of described drill body (9), described bottom refers to that described drill body (9) and described screw rod (4) connecting portion are described arc transition section connecting portion (5), wherein being positioned at two line of symmetry B (8) that the line of symmetry A (7) of described driving groove (2) at the greatest circle shaped position place of described drill body (9) is adjacent with described line of symmetry A (7) and the angle of two line of symmetry C (6) is 20-40 degree, and described line of symmetry B (8) and two line of symmetry C (6) are 60-80 degree with horizontal angle, on screw rod (4), there is threaded joints (3).
2. drill bit as claimed in claim 1, described gear wheel (1) for carbide alloy become be grouped into, it specifically consists of by mass percentage: 50% Co, 10% Ni, 30% C, surplus is copper, and total impurities is not more than 0.45%, gross mass percentage sum is 100%.
3. drill bit as claimed in claim 1, described gear wheel (1) for carbide alloy become be grouped into, it specifically consists of by mass percentage: 55% Co, 20% Ni, 25% C, and total impurities is not more than 0.45%, and gross mass percentage sum is 100%.
4. drill bit as claimed in claim 1, being positioned at two line of symmetry B (8) that the line of symmetry A (7) of described driving groove (2) at the greatest circle shaped position place of described drill body (9) is adjacent with described line of symmetry A (7) and the angle of two line of symmetry C (6) is 20 degree, and described line of symmetry B (8) and two line of symmetry C (6) are 60 degree with horizontal angle.
5. drill bit as claimed in claim 1, the radian of described arc transition section connecting portion (5) is 80 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410324372.XA CN104074465A (en) | 2014-07-09 | 2014-07-09 | Drill bit for scraper cutting roller cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410324372.XA CN104074465A (en) | 2014-07-09 | 2014-07-09 | Drill bit for scraper cutting roller cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104074465A true CN104074465A (en) | 2014-10-01 |
Family
ID=51596031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410324372.XA Pending CN104074465A (en) | 2014-07-09 | 2014-07-09 | Drill bit for scraper cutting roller cone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104074465A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101589207A (en) * | 2006-11-29 | 2009-11-25 | 贝克休斯公司 | Detritus flow management features for drag bit cutters and bits so equipped |
| CN101605962A (en) * | 2007-02-12 | 2009-12-16 | 贝克休斯公司 | Rotary drag |
| US20100163310A1 (en) * | 2008-12-31 | 2010-07-01 | Baker Hughes Incorporated | Method of manufacturing and repairing fixed-cutter drag-type rotary tools with cutting control structures |
| US20100175930A1 (en) * | 2009-01-09 | 2010-07-15 | Baker Hughes Incorporated | Drill Bit With A Hybrid Cutter Profile |
| CN202483456U (en) * | 2012-04-01 | 2012-10-10 | 北京金宝顺福石油技术开发有限公司 | Novel arc-head petroleum drill bit |
-
2014
- 2014-07-09 CN CN201410324372.XA patent/CN104074465A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101589207A (en) * | 2006-11-29 | 2009-11-25 | 贝克休斯公司 | Detritus flow management features for drag bit cutters and bits so equipped |
| CN101605962A (en) * | 2007-02-12 | 2009-12-16 | 贝克休斯公司 | Rotary drag |
| US20100163310A1 (en) * | 2008-12-31 | 2010-07-01 | Baker Hughes Incorporated | Method of manufacturing and repairing fixed-cutter drag-type rotary tools with cutting control structures |
| US20100175930A1 (en) * | 2009-01-09 | 2010-07-15 | Baker Hughes Incorporated | Drill Bit With A Hybrid Cutter Profile |
| CN202483456U (en) * | 2012-04-01 | 2012-10-10 | 北京金宝顺福石油技术开发有限公司 | Novel arc-head petroleum drill bit |
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Application publication date: 20141001 |
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| WD01 | Invention patent application deemed withdrawn after publication |