Reduced residual tensile stress superabrasive cutters for earth boring and drill bits so equipped
US5971087A · kind A · utility
45Cited by
25References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | May 20, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A superabrasive cutting element, the substrate of which is structured with a reduced dimension circumferential portion about which is formed an annular portion of superabrasive material, such as sintered diamond in the form of a polycrystalline diamond compact, to provide a ring- or skirt-like portion of superabrasive material at the perimeter of the cutting element to reduce residual tensile stresses existing at the perimeter of the cutting element after formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.