Cutting elements and bits incorporating the same

Details Cutting elements and bits incorporating the same Cutting elements and bits incorporating the same

2007-06-11

2009-10-20

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

Reexamination Certificate

active

07604074

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.

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