Roller cone drill bits with optimized bearing structures
US9493990B2 · kind B2 · utility
0Cited by
116References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2007 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Jan 16, 2033 |
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.