CN202483444U - Variable-angle diamond tooth drill bit with multiple scraper strips - Google Patents
Variable-angle diamond tooth drill bit with multiple scraper strips Download PDFInfo
- Publication number
- CN202483444U CN202483444U CN2012201383695U CN201220138369U CN202483444U CN 202483444 U CN202483444 U CN 202483444U CN 2012201383695 U CN2012201383695 U CN 2012201383695U CN 201220138369 U CN201220138369 U CN 201220138369U CN 202483444 U CN202483444 U CN 202483444U
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- drill bit
- degree
- tooth
- pdc
- scraper
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Abstract
The utility model discloses a variable-angle diamond tooth drill bit with multiple scraper strips, and belongs to the field of petroleum exploration tools. A threaded joint is arranged at the lower section of a drill bit body; a drill bit crown part is formed at the upper section of the drill bit body; 4 to 6 scraper strips are asymmetrically arranged on the crown part of the drill bit; polycrystalline diamond compact (PDC) teeth are welded on each scraper strip; a surface slot is formed on the top of the crown part of the drill bit, and a slag discharging slot is formed on the side face of the crown part of the drill bit; an inner flow channel is formed in the center of the drill bit body; and the scraper strips with the PDC teeth A and the PDC teeth B on the top of the crown part of the drill bit are arranged at intervals. According to the variable-angle diamond tooth drill bit, a rear inclination angle and a side inclination angle of each PDC tooth are changed, so that the variable-angle diamond tooth drill bit can adapt to a complicated stratum condition; the drill bit is low in abrasion; and the service life of the drill bit is prolonged.
Description
Technical field
The utility model belongs to oil detective tools range, particularly a kind of varied angle diamond tooth drill bit with many scraper strips.
Background technology
At present in the exploitation of oil, natural gas and other mine drilling wells, most of usefulness be diamond tooth (PDC tooth) drill bit and three gear wheels bore PDC tooth back rake angle be to immobilize or do not have back rake angle, poor to bad ground situation compliance, accidents happened easily; It is slow that three gear wheels bore rate of penetration, makes complicacy, and also poor to bad ground situation compliance, scraper strip PDC tooth all is the PDC tooth of single diameter, can not adapt to the deficiency of bad ground situation.
The utility model content
The purpose of the utility model be to most of usefulness in the prior art be diamond tooth (PDC tooth) drill bit and three gear wheels bore PDC tooth back rake angle be to immobilize or do not have back rake angle, poor to bad ground situation compliance, accidents happened easily; It is slow that three gear wheels bore rate of penetration, makes complicacy, to the also poor deficiency of bad ground situation compliance, proposes a kind of varied angle diamond tooth drill bit with many scraper strips, it is characterized in that,
Said bit body top with varied angle diamond tooth drill bit of many scraper strips is drill bit, and the bottom is the connecting thread section, and the center is an inner flow passage; Drill bit is made up of N asymmetrical scraper strip, and N is 4-12; Be the face groove between each scraper strip at drill bit top, the face groove connects the chip area of side; Nozzle bore communicates with face groove and inner flow passage respectively.
Each scraper strip asymmetric geometry at said drill bit top is two kinds of alternate layouts of PDC tooth of being arranged by different back rake angles, and promptly these PDC tooth back rake angles change; Two kinds of PDC teeth that wherein different back rake angles are arranged are A PDC tooth and B PDC tooth.
The alternate layout of scraper strip with A PDC tooth and B PDC tooth row row at said drill bit top.
Said each scraper strip has three PDC teeth at least, and the PDC tooth of each scraper strip has three kinds of back rake angles at least, promptly by the A PDC tooth scraper strip of A1, A2, A3 and A4 layout and the B PDC tooth scraper strip of being arranged by B1, B2, B3 and B4; The values of camber angles of PDC tooth changes on each scraper strip.
A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of said four blade bar: A1, A2 are that 15 degree, A3 are that 18 degree, A4 are 21 degree; The values of camber angles of PDC tooth is spent between 15 degree 0 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 is that 15 degree, B2 are that 18 degree, B3 and B4 are 21 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and is chosen on each scraper strip.
A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of said five scraper strips: A1 and A2 are that 15 degree, A3 are that 18 degree, A4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 0 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 is that 15 degree, B2 are that 18 degree, B3 and B4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and is chosen on each scraper strip.
A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of said six scraper strips: A1 is that 15 degree, A2 are that 18 degree, A3 and A4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 and B2 are that 15 degree, B3 are that 17 degree, B4 20 spend; The values of camber angles of PDC tooth is spent between 15 degree 0 and is chosen on each scraper.
The beneficial effect of the utility model is to overcome existing wheel to bore rate of penetration slow; Make complicacy, poor to bad ground situation compliance, the deficiency that accidents happened easily; The utility model changes the back rake angle value and the values of camber angles of PDC tooth; To adapt to the bad ground situation, bit wear is little, increases the application life of drill bit.
Description of drawings
Fig. 1 is the bit body structures sketch map of the varied angle diamond tooth drill bit of many scraper strips.
Fig. 2 is the drill bit sketch map of the varied angle diamond tooth drill bit of four blade bar.
Fig. 3 is the drill bit sketch map of the varied angle diamond tooth drill bit of five scraper strips.
Fig. 4 is the drill bit sketch map of the varied angle diamond tooth drill bit of six scraper strips.
The specific embodiment
The utility model proposes a kind of varied angle diamond tooth drill bit with many scraper strips.Explain below in conjunction with accompanying drawing.
Shown in Figure 1 is the bit body structures sketch map of the varied angle diamond tooth drill bit of many scraper strips.Among the figure, bit body 1 top is drill bit 2, and the bottom is a connecting thread section 8, and the center is an inner flow passage 7; Drill bit 2 is that 4-12 asymmetrical scraper strip constitutes by N; Be face groove 3 between each scraper strip at drill bit top, the chip area 6 of face groove 3 connection sides; Nozzle bore 4 communicates 7 with face groove 3 and inner flow passage respectively.Each scraper strip asymmetric geometry at drill bit 2 tops is two kinds of PDC teeth, the 5 alternate layouts of being arranged by different back rake angles, and promptly these PDC tooth 5 back rake angles change; Two kinds of PDC teeth that wherein different back rake angles are arranged are A PDC tooth and B PDC tooth.The alternate layout of scraper strip at the drill bit top with A PDC tooth and B PDC tooth row row.
Each scraper strip has three PDC teeth at least, and the PDC tooth of each scraper strip has three kinds of back rake angles at least, promptly by the A PDC tooth scraper strip of A1, A2, A3 and A4 layout and the B PDC tooth scraper strip of being arranged by B1, B2, B3 and B4; The values of camber angles of PDC tooth 5 changes on each scraper strip.A PDC tooth back rake angle value is different with B PDC tooth back rake angle value on the varied angle diamond tooth drill bit of the varied angle diamond tooth drill bit of the four blade bar for example, the varied angle diamond tooth drill bit of five scraper strips and six scraper strips.
Shown in Figure 2 is the drill bit sketch map of the varied angle diamond tooth drill bit of four blade bar.Among the figure, A PDC tooth back rake angle value is on the varied angle value diamond tooth drill bit of four blade bar: A1, A2 are that 15 degree, A3 are that 18 degree, A4 are 21 degree; The values of camber angles of A PDC tooth is spent between 15 degree 0 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 is that 15 degree, B2 are that 18 degree, B3 and B4 are 21 degree; The values of camber angles of B PDC tooth is spent between 15 degree 5 and is chosen on each scraper strip.
Shown in Figure 3 is the drill bit sketch map of the varied angle diamond tooth drill bit of five scraper strips.Among the figure, A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of five scraper strips: A1 and A2 are that 15 degree, A3 are that 18 degree, A4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 0 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 is that 15 degree, B2 are that 18 degree, B3 and B4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and is chosen on each scraper strip.
Shown in Figure 4 is the drill bit sketch map of the varied angle diamond tooth drill bit of six scraper strips.Among the figure, A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of six scraper strips: A1 is that 15 degree, A2 are that 18 degree, A3 and A4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 and B2 are that 15 degree, B3 are that 17 degree, B4 20 spend; The values of camber angles of PDC tooth is spent between 15 degree 0 and is chosen on each scraper strip.
Claims (7)
1. the varied angle diamond tooth drill bit with many scraper strips is characterized in that, said bit body top with varied angle diamond tooth drill bit of many scraper strips is drill bit, and the bottom is the connecting thread section, and the center is an inner flow passage; Drill bit is made up of N asymmetrical scraper strip, and N is 4-12; Be the face groove between each scraper strip at drill bit top, the face groove connects the chip area of side; Nozzle bore communicates with face groove and inner flow passage respectively.
2. according to the said varied angle diamond tooth drill bit of claim 1 with many scraper strips; It is characterized in that; Each scraper strip asymmetric geometry at said drill bit top is two kinds of alternate layouts of PDC tooth of being arranged by different back rake angles, and promptly these PDC tooth back rake angles change; Two kinds of PDC teeth that wherein different back rake angles are arranged are A PDC tooth and B PDC tooth.
3. according to claim 1 or 2 said varied angle diamond tooth drill bits, it is characterized in that the alternate layout of scraper strip with A PDC tooth and B PDC tooth row row at said drill bit top with many scraper strips.
4. according to the said varied angle diamond tooth drill bit of claim 1 with many scraper strips; It is characterized in that; Said each scraper strip has three PDC teeth at least; The PDC tooth of each scraper strip has three kinds of back rake angles at least, promptly by the A PDC tooth scraper strip of A1, A2, A3 and A4 layout and the B PDC tooth scraper strip of being arranged by B1, B2, B3 and B4; The values of camber angles of PDC tooth changes on each scraper strip.
5. according to the said varied angle diamond tooth drill bit with many scraper strips of claim 4, it is characterized in that A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of four blade bar: A1, A2 are that 15 degree, A3 are that 18 degree, A4 are 21 degree; The values of camber angles of PDC tooth is spent between 15 degree 0 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 is that 15 degree, B2 are that 18 degree, B3 and B4 are 21 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and is chosen on each scraper strip.
6. according to the said varied angle diamond tooth drill bit with many scraper strips of claim 4, it is characterized in that A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of said five scraper strips: A1 and A2 are that 15 degree, A3 are that 18 degree, A4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 0 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 is that 15 degree, B2 are that 18 degree, B3 and B4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and is chosen on each scraper strip.
7. according to the said varied angle diamond tooth drill bit with many scraper strips of claim 4, it is characterized in that A PDC tooth back rake angle value is on the varied angle diamond tooth drill bit of six scraper strips: A1 is that 15 degree, A2 are that 18 degree, A3 and A4 are 20 degree; The values of camber angles of PDC tooth is spent between 15 degree 5 and chosen and B PDC tooth back rake angle value is on each scraper strip: B1 and B2 are that 15 degree, B3 are that 17 degree, B4 20 spend; The values of camber angles of PDC tooth is spent between 15 degree 0 and is chosen on each scraper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201383695U CN202483444U (en) | 2012-04-01 | 2012-04-01 | Variable-angle diamond tooth drill bit with multiple scraper strips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201383695U CN202483444U (en) | 2012-04-01 | 2012-04-01 | Variable-angle diamond tooth drill bit with multiple scraper strips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483444U true CN202483444U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201383695U Expired - Fee Related CN202483444U (en) | 2012-04-01 | 2012-04-01 | Variable-angle diamond tooth drill bit with multiple scraper strips |
Country Status (1)
| Country | Link |
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| CN (1) | CN202483444U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519128A (en) * | 2019-01-18 | 2019-03-26 | 沧州格锐特钻头有限公司 | A kind of gear wheel-PDC cutting structure composite drill bit |
-
2012
- 2012-04-01 CN CN2012201383695U patent/CN202483444U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519128A (en) * | 2019-01-18 | 2019-03-26 | 沧州格锐特钻头有限公司 | A kind of gear wheel-PDC cutting structure composite drill bit |
| CN109519128B (en) * | 2019-01-18 | 2024-02-23 | 沧州格锐特钻头有限公司 | Composite drill bit with cone-PDC cutting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20170401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |