Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2008-05-15
2010-12-07
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S433000, C175S426000, C076S101100
Reexamination Certificate
active
07845438
ABSTRACT:
Embodiments relate to PDCs, methods of fabricating PDCs, and applications for such PDCs. In an embodiment, a PDC includes a substrate and a pre-sintered PCD table including an interfacial surface that is bonded to the substrate. The pre-sintered PCD table may be substantially free of leaching by-products in a region at least proximate to the interfacial surface. In an embodiment, a method of fabricating a PDC includes providing an at least partially leached PCD including an interfacial surface. The method includes removing at least some leaching by-products from the at least partially leached PCD table. After removing the at least some leaching by-products, the method includes bonding the interfacial surface of the at least partially leached PCD table to a substrate to form a PDC.
REFERENCES:
patent: 4608226 (1986-08-01), Lauvinerie et al.
patent: 4797326 (1989-01-01), Csillag
patent: 4943488 (1990-07-01), Sung et al.
patent: 5127923 (1992-07-01), Bunting et al.
Bertagnolli Kenneth E.
Vail Michael A.
Thompson Kenneth
US Synthetic Corporation
Workman Nydegger
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