CN202483455U - Coring bit with multiple scrapers - Google Patents
Coring bit with multiple scrapers Download PDFInfo
- Publication number
- CN202483455U CN202483455U CN2012201383267U CN201220138326U CN202483455U CN 202483455 U CN202483455 U CN 202483455U CN 2012201383267 U CN2012201383267 U CN 2012201383267U CN 201220138326 U CN201220138326 U CN 201220138326U CN 202483455 U CN202483455 U CN 202483455U
- Authority
- CN
- China
- Prior art keywords
- tooth
- drill bit
- degree
- scraper
- back rake
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a coring bit with multiple scrapers and belongs to the field of oil detecting tools. The lower portion of a drill bit body is a thread connector, and the upper portion of the drill bit body is a crown part of a drill bit, wherein 4-8 scrapers are arranged symmetrically on the crown part of the drill bit, and polycrystalline diamond compact (PDC) teeth are respectively welded on each scraper. The top of the crown part of the drill bit is provided with a surface groove, the side of the crown part of the drill bit is provided with a chip groove, and the center of the drill bit body is an internal flow passage. The coring bit with the multiple scrapers changes values of a back rake angle and a side dip angle of the PDC teeth to adapt to complex formation conditions. In addition, due to the fact that abrasion of the drill bit is small, service life of the drill bit is prolonged.
Description
Technical field
The utility model belongs to oil detective tools range, particularly a kind of many scraper coring bits.
Background technology
At present in the exploitation of oil, natural gas and other mine drilling wells, most of usefulness be that diamond (PDC) drill bit and three gear wheels bore, it is slow that three gear wheels bore rate of penetration, makes complicatedly, poor to bad ground situation compliance, accidents happened easily; Diamond (PDC) drill bit can not adapt to the bad ground situation, the deficiency that compliance is poor.
The utility model content
The purpose of the utility model is slow to three gear wheels brill rate of penetration in the prior art, makes complicacy, and poor to bad ground situation compliance, accidents happened easily; Diamond (PDC) drill bit can not adapt to the bad ground situation, the deficiency that compliance is poor, and a kind of many scraper coring bits are provided; It is characterized in that the bit body hypomere is a nipple, epimere is a drill bit; Six scrapers of symmetric arrangement on drill bit; Be welded with the PDC tooth above the every scraper, the face groove is set at the drill bit top and the drill bit side is provided with chip area, and the bit body center is an inner flow passage.
Said drill bit has the scraper strip of one group of symmetry at least, has the PDC tooth of three kinds of back rake angles on every scraper at least, and wherein, it is different that B1 tooth, B2 tooth, B3 tooth and B4 tooth are formed one group back rake angle value; It also is different that A1 tooth, A2 tooth, A3 tooth and A4 tooth are formed one group back rake angle value;
Said back rake angle value is respectively that the B1 tooth is 15 degree; The B2 tooth is the 17-18 degree; B3 tooth and B4 tooth respectively are 20 degree; The angle of heel of said B1 tooth, B2 tooth, B3 tooth and B4 tooth is spent between 15 degree 0 and is chosen.
Said back rake angle value is respectively that A1 tooth and A2 tooth respectively are 15 degree; The A3 tooth is 17 degree, and the A4 tooth is the 20-25 degree; The angle of heel of said A1 tooth, A2 tooth, A3 tooth and A4 tooth is spent between 9 degree 3 and is chosen.
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 six scraper coring bit structural representations.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is eight scraper coring bit vertical views.
The specific embodiment
The utility model provides a kind of many scraper coring bits, explains below in conjunction with accompanying drawing.
Like Fig. 1, shown in Figure 2, said six scraper PDC coring bits are made up of nipple 1, drill bit 2, PDC tooth 3, inner flow passage 4, face groove 5 and chip area 6; The bit body hypomere is a nipple 1; Epimere is a drill bit 2, and six scrapers of symmetric arrangement are welded with PDC tooth 3 above the every scraper on drill bit 2; Drill bit 2 tops are provided with face groove 5 and with drill bit 2 sides chip area 6 are set, and the bit body center is an inner flow passage 4.
Above-mentioned drill bit has the scraper strip of one group of symmetry at least; The PDC tooth that has three kinds of back rake angles on every scraper strip at least; Wherein, the back rake angle value of a group in B1 tooth, B2 tooth, B3 tooth and B4 tooth is respectively that the B1 tooth is 15 degree in six scraper coring bit structural representations shown in Figure 2; The B2 tooth is 17 degree; B3 tooth and B4 tooth respectively are 20 degree; The angle of heel of said B1 tooth, B2 tooth, B3 tooth and B4 tooth is spent between 15 degree 0 and is chosen; The back rake angle value that A1 tooth, A2 tooth, A3 tooth and A4 tooth are one group is respectively A1 tooth 13 degree, and A2 is 15 degree; A3 is 18 degree, and A4 is 25 degree; The angle of heel of said A1 tooth, A2 tooth, A3 tooth and A4 tooth is spent between 9 degree 3 and is chosen.
In eight scraper coring bit vertical views shown in Figure 3, it is respectively that the B1 tooth is 15 degree that B1 tooth, B2 tooth and B3 tooth are formed one group back rake angle value; The B2 tooth is 18 degree; B3 tooth and B4 tooth respectively are 20 degree; The angle of heel of said B1 tooth, B2 tooth, B3 tooth and B4 tooth is spent between 15 degree 0 and is chosen; The back rake angle value that A1 tooth, A2 tooth, A3 tooth and A4 tooth are one group also is to be respectively that A1 tooth and A2 tooth respectively are 15 degree, and A3 is 18 degree, and A4 is 25 degree; The angle of heel of said A1 tooth, A2 tooth, A3 tooth and A4 tooth is spent between 9 degree 3 and is chosen.
Use many scraper coring bits of the utility model; Change the back rake angle value and the values of camber angles of PDC tooth, to adapt to the bad ground situation, scraper strip and diamond cutting tooth are not hard collisions to hard stratum; But certain cushioning effect is arranged; So the diamond cutting tooth is not easy to be injured, so bit wear is little, increase the application life of drill bit.
Claims (4)
1. one kind many scraper coring bits; It is characterized in that the bit body hypomere is a nipple, epimere is a drill bit; Six scrapers of symmetric arrangement on drill bit; Be welded with the PDC tooth above the every scraper, the face groove is set at the drill bit top and the drill bit side is provided with chip area, and the bit body center is an inner flow passage.
2. according to the said many scraper coring bits of claim 1; It is characterized in that said drill bit has the scraper strip of one group of symmetry at least, have the PDC tooth of three kinds of back rake angles on every scraper at least; Wherein, to form one group back rake angle value be different for B1 tooth, B2 tooth, B3 tooth and B4 tooth; It also is different that A1 tooth, A2 tooth, A3 tooth and A4 tooth are formed one group back rake angle value.
3. according to the said many scraper coring bits of claim 1, it is characterized in that said back rake angle value is respectively that the B1 tooth is 15 degree; The B2 tooth is the 17-18 degree; Each 20 degree of B3 tooth and B4 tooth; The angle of heel of said B1 tooth, B2 tooth, B3 tooth and B4 tooth is spent between 15 degree 0 and is chosen.
4. according to the said many scraper coring bits of claim 1, it is characterized in that said back rake angle value is respectively an A1 tooth 13-15 degree, the A2 tooth is 15 degree; The A3 tooth is the 17-18 degree, and the A4 tooth is the 20-25 degree; The angle of heel of said A1 tooth, A2 tooth, A3 tooth and A4 tooth is spent between 9 degree 3 and is chosen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201383267U CN202483455U (en) | 2012-04-01 | 2012-04-01 | Coring bit with multiple scrapers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201383267U CN202483455U (en) | 2012-04-01 | 2012-04-01 | Coring bit with multiple scrapers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483455U true CN202483455U (en) | 2012-10-10 |
Family
ID=46957882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201383267U Expired - Fee Related CN202483455U (en) | 2012-04-01 | 2012-04-01 | Coring bit with multiple scrapers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202483455U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096295A (en) * | 2020-11-09 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | Combined PDC drill bit for drilling and using method thereof |
-
2012
- 2012-04-01 CN CN2012201383267U patent/CN202483455U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096295A (en) * | 2020-11-09 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | Combined PDC drill bit for drilling and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208456509U (en) | A kind of novel PDC, gear wheel composite drill bit | |
| CN202483461U (en) | Polycrystalline diamond compact (PDC) bit with six scrapers | |
| CN202483457U (en) | 8.375-inch-long eight-scraper polycrystalline diamond compact (PDC) coring bit | |
| CN203347693U (en) | PDC (polycrystalline diamond compact) drill bit with gauge teeth | |
| CN204984416U (en) | Cutter bit | |
| CN202483455U (en) | Coring bit with multiple scrapers | |
| CN202483458U (en) | Four-scraping knife stripe mixed teeth drill head | |
| CN202483444U (en) | Variable-angle diamond tooth drill bit with multiple scraper strips | |
| CN206903590U (en) | A kind of new six wings PDC drill bit of band cone tooth | |
| CN206903589U (en) | A kind of new five wings PDC drill bit of band cone tooth | |
| CN201714305U (en) | Geological drill bit | |
| CN202249787U (en) | Geological exploration sharp-tooth mudstone coring drill bit | |
| CN201588554U (en) | Addendum deviated button bit | |
| CN203463017U (en) | Diamond-impregnated bit | |
| CN2743526Y (en) | Top deviating wedge shaped teeth | |
| CN205330542U (en) | Diamond compact piece multiple wing indent drill bit | |
| CN204476282U (en) | A kind of high-performance six wing PDC drill bit | |
| CN204024481U (en) | Pointed tooth PDC drill bit | |
| CN208594868U (en) | A kind of high PDC drill bit of stratum containing gravel | |
| CN202165017U (en) | Diamond composite tooth | |
| CN202417317U (en) | Double-layer coring bit used for coal mine | |
| CN201835751U (en) | Drill bit of gauge protection air hammer | |
| CN205654302U (en) | Polycrystalline diamond compact cambered surface drill bit | |
| CN202194576U (en) | Three-knife wing diamond bit | |
| CN208885192U (en) | A kind of drill bit that point knuckle-tooth wing is spaced apart |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20170401 |