Cutting element attached to downhole fixed bladed bit at a positive rake angle
US9366089B2 · kind B2 · utility
3Cited by
405References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2013 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Oct 28, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/19
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect of the present invention, a downhole fixed bladed bit comprises a working surface comprising a plurality of blades converging at a center of the working surface and diverging towards a gauge of the bit, at least on blade comprising a cutting element comprising a superhard material bonded to a cemented metal carbide substrate at a non-planer interface, the cutting element being positioned at a positive rake angle, and the superhard material comprising a substantially conical geometry with an apex comprising a curvature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.