Polycrystaline diamond compact insert reaming tool

Boring or penetrating the earth – Bit or bit element – Noncutting portion forwardly of cutting portion

Reexamination Certificate

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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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patent: 6695080 (2004-02-01), Presley et al.
patent: WO 93/25794 (1993-12-01), None

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