Drill bits and other downhole tools with hardfacing having tungsten carbide pellets and other hard materials and methods of making thereof
US8322466B2 · kind B2 · utility
10Cited by
28References
38Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 2008 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Jul 26, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2204/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hardfacing is provided to protect surfaces of drill bits and other downhole tools. The hardfacing may include tungsten carbide particles or pellets formed with an optimum weight percentage of binding material and dispersed within and bonded to a matrix deposit. The tungsten carbide particles may be formed by sintering or other appropriate techniques. The tungsten carbide particles may have generally spherical shapes, partially spherical shapes or non-spherical shapes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.