Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1997-06-05
1999-11-09
Dang, Hoang
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175434, E21B 1046
Patent
active
059795786
ABSTRACT:
An improved polycrystalline diamond composite ("PDC") cutter with secondary PDC cutting surfaces in addition to a primary PDC cutting surface is formed comprising of at least two wafers of cemented carbide bonded together. The secondary cutting surfaces are formed by compacting and sintering diamond in grooves formed at the surface of the wafers. Wafers of different grades of cemented carbide may be used. Moreover, different grades of diamond may be compacted and sintered in different grooves.
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Dang Hoang
Smith International Inc.
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