Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Rolling or rotatable-type bit mount
Reexamination Certificate
2011-08-30
2011-08-30
Kreck, John (Department: 3672)
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Rolling or rotatable-type bit mount
C299S104000
Reexamination Certificate
active
08007050
ABSTRACT:
A degradation assembly comprises a rotating portion and a fixed portion. The rotating portion comprises a wear resistant tip bonded to a carbide bolster. The bolster is attached to a shaft adapted for a rotatable connection within a bore of the fixed portion. The fixed portion is adapted for a rigid connection to a driving mechanism. The fixed portion includes an O-ring slot formed within its bore and with an O-ring being disposed therein. The O-ring is at least 15 percent compressed such that the O-ring resists rotation of the shaft.
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Crockett Ronald
Hall David R.
Jepson Jeff
Brinks Hofer Gilson & Lione
Kreck John
Schlumberger Technology Corporation
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