Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2005-08-02
2005-08-02
Neuder, William (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C175S426000
Reexamination Certificate
active
06923276
ABSTRACT:
An earth-boring bit has a bit body, at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body, and a cutter mounted for rotation on the bearing shaft. The cutter includes a plurality of teeth that are covered with a hardfacing layer. At least some of the teeth have a leading side that has a streamlined contour. The streamlined contour is generally conical in some of the embodiments. In others, the streamlined contour is defined by a corner between diverging inner and outer sections of the leading side.
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Massey Alan J.
Morgan Jeremy K.
Overstreet James L.
Pessier Rudolf Carl Otto
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Neuder William
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