Stress-reduced superhard cutting element
US5492188A · kind A · utility
106Cited by
10References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1994 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Jun 17, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2226/315
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A cutting element suitable for incorporation in a drill bit used for earth drilling is disclosed which comprises an abrasive layer of superhard material formed on a substrate support, the substrate and/or the abrasive layer being structurally modified to reduce and/or redistribute detrimental tensile stresses which occur at the periphery of the abrasive layer and at or near the interface between the abrasive layer and the substrate, and within the body of the substrate. The modified cutting element structure reduces the occurrence of fracturing and cutter degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.