Boring or penetrating the earth – Cutter element laterally shiftable below ground
Reexamination Certificate
2001-08-08
2008-11-18
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
Cutter element laterally shiftable below ground
C175S406000
Reexamination Certificate
active
07451836
ABSTRACT:
An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one spiral blade is formed on at least one reamer pad. A plurality of cutting elements are disposed on the at least one spiral blade.An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one blade is formed on the at least two reamer pads. A plurality of cutting elements are disposed on the at least one blade and at least one gage protection element is disposed on a gage surface of the at least one blade. The plurality of cutting elements are arranged so as to enable the expandable reaming tool to backream a formation in a wellbore.
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Beaton Timothy P.
Hoffmaster Carl M.
Truax David K.
Dang Hoang
Osha • Liang LLP
Smith International Inc.
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