Bowed crests for milled tooth bits
US6948403B2 · kind B2 · utility
10Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Aug 16, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/52
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of forming milled teeth on a roller cone of a milled tooth roller cone rock bit includes shaping a crest of a chisel shaped milled tooth on the roller cone. The crest is shaped such that the crest has a convex profile from one corner to an opposite corner of the crest. Such a 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. Further, the forming includes radiusing each of the corners at the ends of the crest of the chisel shaped milled tooth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.