Roller cone drill bit with improved erosion resistance
US9988854B2 · kind B2 · utility
1Cited by
13References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2016 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Feb 6, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/20
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of manufacturing a roller cone for a drill bit includes: selectively carburizing a land of the roller cone between a plurality of spots on the land for protection against erosion; after carburization, forming sockets in the roller cone at the spots; and mounting cermet inserts in the sockets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.