Boring or penetrating the earth – Bit or bit element – Noncutting portion forwardly of cutting portion
Reexamination Certificate
2006-11-21
2006-11-21
Gay, Jennifer H. (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Noncutting portion forwardly of cutting portion
C175S335000, C175S391000
Reexamination Certificate
active
07137463
ABSTRACT:
A reaming tool that includes a body having reaming blades affixed thereto. The reaming blades each have at least one cutter attached thereto at a selected position and orientation. The plurality of reaming blades includes at least one radially most extensive reaming blade. The reaming tool further includes a pilot blade azimuthally spaced apart from the at least one radially most extensive reaming blade. The pilot blade is affixed to the body longitudinally ahead of the at least one radially most extensive reaming blade.
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Gay Jennifer H.
Osha & Liang LLP
Smith International Inc.
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