Roller cone drill bits with optimized bearing structures
US7360612B2 · kind B2 · utility
54Cited by
111References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2005 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Jun 23, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a respective cutting structure with a minimal moment center located along each respective axis of rotation. Each respective bearing structure has a center point located proximate each respective minimal moment center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.