Superhard cutting structure having reduced surface roughness and bit for subterranean drilling so equipped
US6145608A · kind A · utility
112Cited by
51References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T407/27
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A superhard cutting element having a polished, low friction, substantially planar cutting face with a surface finish roughness of 10 .mu.in. or less and preferably 0.5 .mu.in. or less. A chamfered cutting edge and side surface of the superhard material table of the same surface finish roughness are also disclosed. The surface roughness of the aforementioned superhard material table portions may be reduced by mechanically smoothing and polishing according to one of several variations of the method of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.