IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
UP-0938069
(2004-09-10)
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등록번호 |
US-7681670
(2010-04-21)
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발명자
/ 주소 |
- Centala, Prabhakaran K.
- Larsen, James L.
- Boudrare, Mohammed
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출원인 / 주소 |
- Smith International, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
26 |
초록
▼
A two-cone drill bit with a hydraulic arrangement that can be used for one or more of the following: cleaning roller cones, impinging on a hole bottom, or inducing a helical flow field. A two-cone drill bit having a bit body formed from two leg sections and two spacing members; methods of manufactur
A two-cone drill bit with a hydraulic arrangement that can be used for one or more of the following: cleaning roller cones, impinging on a hole bottom, or inducing a helical flow field. A two-cone drill bit having a bit body formed from two leg sections and two spacing members; methods of manufacturing a two-cone drill bit; and methods of improving hydraulics of a two-cone drill bit are disclosed.
대표청구항
▼
What is claimed is: 1. A two-cone drill bit for drilling a well bore, the two-cone drill bit comprising: a bit body comprising, a connection adapted to connect to a drill string, two leg sections each having a leg formed thereon and disposed between about 145 degrees and about 166 degrees from each
What is claimed is: 1. A two-cone drill bit for drilling a well bore, the two-cone drill bit comprising: a bit body comprising, a connection adapted to connect to a drill string, two leg sections each having a leg formed thereon and disposed between about 145 degrees and about 166 degrees from each other, a fluid plenum, and two spacing members disposed on opposite sides from each other between each of the two leg sections, wherein each of the two spacing members comprise two openings therein, each forming a conduit for channeling a fluid from the fluid plenum to outside the bit body; and a roller cone rotatably mounted to each leg; wherein the bit body comprises at least two components other than the two legs extending to bit gage. 2. The two-cone drill bit of claim 1, further comprising: a nozzle attached to at least one of the openings. 3. The two-cone drill bit of claim 2, wherein the nozzle is oriented to direct a fluid stream to perform at least one function selected from the group consisting of cleaning the roller cone, impinging on a hole bottom, and inducing a helical flow field. 4. The two-cone drill bit of claim 2, wherein the nozzle comprises an extension piece. 5. The two-cone drill bit of claim 4, wherein the extension piece extends proximate to a hole bottom. 6. The two-cone drill bit of claim 1, wherein one of the conduits is oriented to direct the fluid to impinge on the hole bottom and another of the conduits is oriented to direct the fluid to clean one of the roller cones. 7. The two-cone drill bit of claim 1, wherein one of the conduits is oriented to direct the fluid to create a helical flow field and another of the conduits is oriented to direct the fluid to clean one of the roller cones. 8. The two-cone drill bit of claim 1, further comprising: four nozzles each attached to one of the four openings, wherein each of the four nozzles is selected from the group consisting of a cone cleaning nozzle, a hole bottom cleaning nozzle, and a helical flow nozzle. 9. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a cone cleaning nozzle oriented at a lateral angle greater than a magnitude of about 6 degrees. 10. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a cone cleaning nozzle oriented at a lateral angle greater than a magnitude of about 10 degrees. 11. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a hole bottom cleaning nozzle oriented at a lateral angle less than a magnitude of about 5 degrees. 12. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a hole bottom cleaning nozzle oriented at a lateral angle of about 0 degrees. 13. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a hole bottom cleaning nozzle oriented at a radial angle of about 0 degrees. 14. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a helical flow nozzle oriented at a lateral angle greater than a magnitude of about 6 degrees. 15. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a helical flow nozzle oriented at a lateral angle greater than a magnitude of about 10 degrees. 16. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a helical flow nozzle oriented at a lateral angle greater than a magnitude of about 15 degrees. 17. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a helical flow nozzle directed towards one selected from the group consisting of a hole bottom, a gage area of a well bore and a hole wall. 18. The two-cone drill bit of claim 8, wherein the four nozzles are cone cleaning nozzles. 19. The two-cone drill bit of claim 8, wherein the four nozzles are bottom hole cleaning nozzles. 20. The two-cone drill bit of claim 8, wherein two of the four nozzles are cone cleaning nozzles and two of the four nozzles are helical flow nozzles. 21. The two-cone drill bit of claim 8, wherein at least one of the nozzles is a helical flow nozzle directed towards the hole wall. 22. The two-cone drill bit of claim 1, wherein the bit body comprises: a center opening in a bottom of the bit body. 23. The two-cone drill bit of claim 1, further comprising: a gauge pad. 24. The two-cone drill bit of claim 1, wherein the two legs are disposed between about 163 degrees and about 165 degrees from each other. 25. The two-cone drill bit of claim 1, wherein at least one of the two openings on one of the two spacing members is at a location near the bottom of the drill bit. 26. The two-cone drill bit of claim 1, wherein both of the two openings on one of the two spacing members are directed towards different portions on one of the roller cones. 27. The two-cone drill bit of claim 1, wherein at least one of the two spacing members has one opening that is at a location near the hole bottom and wherein the other opening is directed towards a portion of a cone. 28. The two-cone drill bit of claim 1, wherein at least one of the two space members has an opening that is at a location near the hole bottom and wherein the other opening is directed to create helical flow. 29. The two-cone drill bit of claim 1, wherein the offset from the hole bottom of at least one opening on the first side of the bit is determined by the desired bottom hole energy and wherein the other opening is directed toward a portion of a cone. 30. The two-cone drill bit of claim 1, wherein the two-cone drill bit comprises at least one other opening. 31. The two-cone drill bit of claim 1, wherein each spacing member has at least two points of contact with the borehole.
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