Abrading – Rigid tool – Rotary cylinder
Reexamination Certificate
2007-05-15
2007-05-15
Eley, Timothy V. (Department: 3724)
Abrading
Rigid tool
Rotary cylinder
C051S309000, C451S540000
Reexamination Certificate
active
10369007
ABSTRACT:
A method of forming and applying a diamond coating or other superhard coating to a tool, most preferably a downhole tool, such as a drill bit. A superhard powder is placed into slurry and then formed, preferably using a tape casting method, into a green tape that is capable of being handled and applied to a substrate. The tape is then applied to a desired surface on a part or tool, being affixed initially thereto by a suitable braze. The tape is then cured to the surface using a thermal cycle that transforms the tape into a solid diamond composite coating. In another aspect, diamond tape is combined with ceramic tape having electronic circuitry components integrated therein.
REFERENCES:
patent: 5379853 (1995-01-01), Lockwood et al.
patent: 5855997 (1999-01-01), Amateau
patent: 6669745 (2003-12-01), Prichard et al.
patent: 2002/0077054 (2002-06-01), Sung
patent: 2003/0209534 (2003-11-01), Ferguson
patent: 2004/0112359 (2004-06-01), Sung
patent: 0 134 709 (1988-04-01), None
Andreas Roosen, “Basic Requirements for Tape Casting of Ceramic Powders,”Ceramic Transactions, vol. 1, Part B, Ceramic Powder Science (1988).
Baker Hughes Incorporated
Eley Timothy V.
Madan Mossman & Sriram P.C.
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