Passive and active up-drill features on fixed cutter earth-boring tools and related systems and methods
US8047309B2 · kind B2 · utility
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31References
31Claims
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Assignee
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Key dates
| Filing date | Jun 5, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Nov 20, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1092
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Earth-boring tools include at least one up-drill feature disposed on a transition surface so as to be passive during down drilling and active during up drilling and/or back reaming operations. Systems for down drilling and up drilling with drill bits comprising one or more up-drill features are also disclosed. Furthermore, methods for forming a borehole with an earth-boring tool including such up-drill features and for forming an earth-boring tool comprising such up-drill features are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.