Earth boring bit with wear resistant bearing and seal
US8196682B2 · kind B2 · utility
3Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2009 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Jun 25, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cone bit is provided that includes a wear resistant coating applied to a bearing shaft, which is attached to a roller cone. The wear resistant coating can be a tungsten/tungsten carbide composite applied by chemical vapor deposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.