The present invention addresses this need in the art by providing a cutter insert
comprising a plug section and a cutter pedestal. The cutter insert is preferably
formed of tungsten carbide, except for two exterior surfaces covered with PDC.
The plug section may be circular or oval in cross section perpendicular to the
axis of the insert. The plug section and the pedestal each defines a shoulder which
is coated with a PDC layer. In this way, two cutting surfaces are applied to the
formation, enhancing the cutting ability of the insert.
