Boring or penetrating the earth – Processes
Reexamination Certificate
2006-07-11
2006-07-11
Neuder, William (Department: 3672)
Boring or penetrating the earth
Processes
C175S372000, C277S444000
Reexamination Certificate
active
07073611
ABSTRACT:
Elastomeric seals for use in drill bits on which an inorganic surface modification material has been deposited onto the surface of the elastomeric seals. Wear resistance of the seal at the dynamic surface is improved by providing support for the soft seal surface, by means of the inorganic atoms, against a harder surface.
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patent: 2003/0062200 (2003-04-01), Blackman
patent: 2003/0104158 (2003-06-01), Gui et al.
patent: 2004/0237840 (2004-12-01), Yamamoto et al.
Sui Ping
Wei Ronghua
Halliburton Energy Service,s Inc.
Neuder William
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