Two-cone drill bit with enhanced stability
US7549488B2 · kind B2 · utility
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2References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2008 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jan 7, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A two-cone drill bit that exhibits improved stability. In one embodiment, the two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of cutting elements arranged on the roller cones such that a bottom hole coverage greater than about 17 percent is achieved per revolution of the two-cone drill bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.