CN202431207U - Composite cutting teeth structure for PDC (polycrystalline diamond compact) bit - Google Patents
Composite cutting teeth structure for PDC (polycrystalline diamond compact) bit Download PDFInfo
- Publication number
- CN202431207U CN202431207U CN2011205143997U CN201120514399U CN202431207U CN 202431207 U CN202431207 U CN 202431207U CN 2011205143997 U CN2011205143997 U CN 2011205143997U CN 201120514399 U CN201120514399 U CN 201120514399U CN 202431207 U CN202431207 U CN 202431207U
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- cutting
- teeth
- hypsokinesis
- drill bit
- tooth
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Abstract
The utility model discloses a composite cutting teeth structure for a PDC (polycrystalline diamond compact) bit, which comprises a wing and main cutting teeth, wherein a group of retroverted pointed teeth are formed behind the main cutting teeth; and the cutting ends of the retroverted pointed teeth are wedged. Through the adoption of the novel composite cutting manner (plow cutting), the front row of main cutting teeth is adopted for normal rock breaking cutting, and the rear row of novel retroverted pointed teeth is adopted for plow cutting. Tests show that the rear row of the novel retroverted pointed teeth can conduct plow cutting on a formation through short circular arc-shaped tooth surface parts, so as to realize pre-crushing of the formation and improve the rock breaking efficiency of the main cutting teeth. Therefore, the cutting capability of the bit in a plasticine formation is improved.
Description
Technical field
The utility model relates to a kind of PDC drill bit, relates in particular to a kind of plastic formation PDC drill bit combined cut toothings such as plasticine stratum that are used for.
Background technology
The PDC drill bit is a kind of synthetic diamond core bit of extensive use in present oil, the natural gas drilling.To cut brokenly the broken bottom rock of rock mode, the pressure of the drill effect keeps cutting teeth wedging stratum certain depth to PDC bit cutting tooth under the effect of pressure and moment of torsion in the drilling process, and torsional interaction keeps cutting teeth to cut the stratum continuously.To in the plasticine stratum creep into because the plasticine stratum belongs to plastic formation, existing cutting way can not creep into it effectively, causes the rate of penetration of PDC drill bit low excessively.Rate of penetration when improving PDC drill bit creeping in plasticine, the existing at present design about this respect is like a kind of point circle combination tooth PDC drill bit; Divide arrange chisel teeth and cylin-drical tooth on the drill bit; A kind of PDC creeps into pointed tooth comprehensively and strengthens teeth drill bit, inlays the pointed tooth that creeps into of one group of canine tooth shape at the back at the main cutting tooth, and this creeps into pointed tooth and adopts the man-made polycrystalline diamond composite sheet; These designs for the back toothrow have improved the drilling efficiency of drill bit to a certain extent; But reduced the impact resistance of drilling stability with the back toothrow, the too early damage of back toothrow causes the main cutting tooth to wear and tear fast, thereby the application life of having reduced drill bit.
The utility model content
To above-mentioned prior art, the technical problem that the utility model will solve provides a kind of wearing and tearing that in plastic formations such as plasticine, reduce the main cutting tooth, improves the PDC drill bit combined cut toothing of the impact resistance of back toothrow.
In order to solve the problems of the technologies described above; The utility model adopts following technical scheme: a kind of PDC drill bit combined cut toothing; Comprise wing, main cutting tooth, the back of said main cutting tooth is provided with one group of hypsokinesis pointed tooth that retreats, and the cutting end of said hypsokinesis pointed tooth is a wedge shape.
Further, the inclination angle A angle that constitutes with respect to hypsokinesis pointed tooth axle center of the lozenges of said hypsokinesis pointed tooth be 6 ° ~
15°。
Further, the acute angle B angle of the connecting line of the dual-side of said hypsokinesis pointed tooth and dual-side end points formation is 45 ° ~ 65 °.
Compared with prior art, the utlity model has following beneficial effect: the utility model adopts new combined cut mode (wedge shape plow), and front-seat main cutting tooth adopts normal broken rock cutting, and back toothrow adopts novel hypsokinesis pointed tooth.Test result shows that this novel back row's cutting teeth carries out precracking through short circular-arc tooth surface part plow stratum to the stratum, has improved the efficiency of breaking rock of main cutting tooth, thereby has improved the cutting power of drill bit in the plasticine stratum.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of hypsokinesis pointed tooth;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the right view of Fig. 2;
Fig. 5 is the A-A sectional view of Fig. 4.
The specific embodiment
To combine the accompanying drawing and the specific embodiment that the utility model is done further to describe below.
Referring to Fig. 1-5, a kind of PDC drill bit combined cut toothing comprises wing 1, main cutting tooth 2, and the back of said main cutting tooth 2 is provided with one group of hypsokinesis pointed tooth 3 that retreats, and the cutting end of said hypsokinesis pointed tooth 3 is a wedge shape; The lozenges 5 of said hypsokinesis pointed tooth 3 is preferably 12 ° with respect to the inclination angle A angle in hypsokinesis pointed tooth 3 axle center; The acute angle B angle that the connecting line of the dual-side of said hypsokinesis pointed tooth 3 and dual-side end points constitutes is preferably 51 °.
The utility model is guaranteeing to have under the prerequisite of reinforcement and cushioning effect; Increase the function of its auxiliary rock; Improved rock breaking efficiency through the plow effect of hypsokinesis pointed tooth 3 and the broken jointly rock of shear action of main cutting tooth 2; And reduced the wearing and tearing of main cutting tooth 2 in plasticine stratum 4 to a certain extent, improved the impact resistance of hypsokinesis pointed tooth 3 in plasticine stratum 4.
Claims (5)
1. a PDC drill bit combined cut toothing comprises wing (1), main cutting tooth (2), it is characterized in that: the back of said main cutting tooth (2) is provided with one group of hypsokinesis pointed tooth (3) that retreats, and the cutting end of said hypsokinesis pointed tooth (3) is a wedge shape.
2. PDC drill bit combined cut toothing according to claim 1 is characterized in that: the lozenges (5) of said hypsokinesis pointed tooth (3) is 6 ° ~ 15 ° with respect to the inclination angle A angle that hypsokinesis pointed tooth (3) axle center constitutes.
3. PDC drill bit combined cut toothing according to claim 1 is characterized in that: the acute angle B angle that the dual-side of said hypsokinesis pointed tooth (3) and the connecting line of dual-side end points constitute is 45 ° ~ 65 °.
4. PDC drill bit combined cut toothing according to claim 2, it is characterized in that: said inclination angle A is 12 °.
5. PDC drill bit combined cut toothing according to claim 3 is characterized in that: said acute angle B angle is 51 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205143997U CN202431207U (en) | 2011-12-12 | 2011-12-12 | Composite cutting teeth structure for PDC (polycrystalline diamond compact) bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205143997U CN202431207U (en) | 2011-12-12 | 2011-12-12 | Composite cutting teeth structure for PDC (polycrystalline diamond compact) bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431207U true CN202431207U (en) | 2012-09-12 |
Family
ID=46780667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205143997U Expired - Lifetime CN202431207U (en) | 2011-12-12 | 2011-12-12 | Composite cutting teeth structure for PDC (polycrystalline diamond compact) bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431207U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061676A (en) * | 2013-01-14 | 2013-04-24 | 山东国岳金刚石制品有限公司 | Ploughing-cutting type diamond bit |
| CN105275403A (en) * | 2014-07-01 | 2016-01-27 | 中国石油化工集团公司 | A plowing type PDC drill bit suitable for hard formations |
| CN105888562A (en) * | 2016-04-29 | 2016-08-24 | 宜昌神达石油机械有限公司 | Inclination-proof PDC drill bit capable of easily removing chips |
| CN109424323A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of orientation CDE drill bit suitable for ground consisting of hard rock |
-
2011
- 2011-12-12 CN CN2011205143997U patent/CN202431207U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061676A (en) * | 2013-01-14 | 2013-04-24 | 山东国岳金刚石制品有限公司 | Ploughing-cutting type diamond bit |
| CN105275403A (en) * | 2014-07-01 | 2016-01-27 | 中国石油化工集团公司 | A plowing type PDC drill bit suitable for hard formations |
| CN105888562A (en) * | 2016-04-29 | 2016-08-24 | 宜昌神达石油机械有限公司 | Inclination-proof PDC drill bit capable of easily removing chips |
| CN109424323A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of orientation CDE drill bit suitable for ground consisting of hard rock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |
|
| CX01 | Expiry of patent term |