Hardfaced mill tooth rotary cone rock bit
US5152194A · kind A · utility
54Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Apr 24, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A milled teeth rotary cone rock bit consists of chisel crested milled teeth with generously radiused corners at the ends of the crest. A concave depression is formed in the crest between the radiused ends. A layer of hardfacing material formed over each tooth is thicker at the corners and in the concave depressions in the crest to provide a means to inhibit wear of the hardfacing as the bit works in a borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.