Superabrasive cutter having optimized table thickness and arcuate table-to-substrate interfaces
US6527069B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Dec 31, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5673
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cutter and a drill bit having such cutters for drilling subterranean formations including a superabrasive table formed on an end face of a supporting substrate, there being an interface between the table and the end face including a topographic configuration including at least one, and preferably a plurality of, annular arcuate surfaces centered about the centerline of the cutter and at least one recessed region or groove extending across a substantial portion of the end face. The topographic configuration of the end face is of an orientation and radial width sufficient to accommodate resultant loading of the cutting edge of the cutter throughout a variety of angles with vectors normal to the surface at a variety of angles such that at least one normal vector is aligned substantially parallel to the resultant loading on the cutting edge. The topographic configuration of the end face, preferably including at least one recessed portion, further provides a cutter in which the superabrasive table and the substrate are less prone to cracking, spalling, and catastrophic failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.