Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2008-12-22
2011-10-04
Beach, Thomas (Department: 3674)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C175S344000, C175S334000
Reexamination Certificate
active
08028769
ABSTRACT:
A reamer bit for use in earth boring operations comprising a body, cutter mounts having rolling cutters on the bit body, and stabilizers pads on the body placed between adjacent cutter mounts. The reamer may further include a pilot bit on a drill pipe extending downward from the reamer body. The reamer bit outer periphery with its stabilizers and bit body has a radial profile approximating a circle thereby reducing dynamic perturbations during drilling operations.
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Buske Robert J.
Overstreet James
Pessier Rudolf Carl
Baker Hughes Incorporated
Beach Thomas
Bracewell & Giuliani LLP
Sayre James G.
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