Bowed crests for milled tooth bits
US6725952B2 · kind B2 · utility
12Cited by
14References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/52
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit has a bit body and at least one roller cone rotatably mounted on the bit body. The cone has a plurality of milled teeth at selected locations on the cone. At least one of the milled teeth has a substrate having a convex crest and a layer of hardfacing applied to the convex crest. The convex crest is adapted to produce at least one of a convex axial stress distribution, a substantially even axial stress distribution, and a substantially smooth axial stress distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.