Cutting elements and bits incorporating the same
US7604074B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2007 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Jun 11, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cutting element is provided including a substrate having a periphery and an interface surface. An ultra hard material layer is formed over the substrate and interfaces with the interface surface. The interface surface also includes a plurality of spaced apart projections formed inwardly and spaced apart from the periphery and arranged around an annular path, such that each projection includes a convex upper surface defining the projection as viewed in plan view. Each upper surface continuously and smoothly curves in the same direction when viewed along a plane through a diameter of the substrate. Bits incorporating such cutting elements are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.