Steel tooth drill bit with improved tooth breakage resistance
US7654346B2 · kind B2 · utility
4Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Oct 1, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C29/067
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A drill bit having steel teeth is provided with a combination of hardfacing materials on the teeth. The bases of the teeth are hardfaced with nickel-based materials to significantly reduce any potential cracking therein. Portions of the supporting cones adjacent the teeth also may be fabricated with the nickel-based hardfacing. All other portions of the teeth are hardfaced with iron-based materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.