Rotary drag bit with pointed cutting elements
US8122980B2 · kind B2 · utility
12Cited by
127References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2007 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Apr 29, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect of the invention a rotary drag bit has a bit body intermediate a shank and a working surface. The working surface has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working surface. At least one blade has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry. The diamond working end has a central axis which intersects an apex of the pointed geometry such that the axis is oriented within a 15 degree rake angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.