Downhole drill bit
US8590644B2 · kind B2 · utility
13Cited by
363References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jun 28, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/43
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect of the present invention, a drill bit has a body intermediate a shank and a working face. The working face has a plurality of blades converging towards a center of the working face and diverging towards a gauge of the working face. A first blade has at least one pointed cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry at a non-planar interface and a second blade has at least one shear cutting element with a carbide substrate bonded to a diamond working end with a flat geometry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.