Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals
US7434632B2 · kind B2 · utility
4Cited by
111References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Aug 20, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Roller cone drill bits may be formed with cutting elements and cutting structures having cutting element profile angles selected to minimize cone wobble and improve life of associated bearings and seals. Normal force axes of the cutting elements may intersect with each other as a force center. Crest points of the cutting elements may be disposed on one or more circles extending from the associated force center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.