Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2011-03-15
2011-03-15
Neuder, William P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S374000
Reexamination Certificate
active
07905301
ABSTRACT:
An earth boring bit formed from an alloy comprising a low carbon content and high molybdenum content is disclosed herein. The molybdenum content is greater than about 0.8% to about 1.15% by weight of the alloy. The carbon content may range up to about 0.16% by weight of the alloy. The alloy may further comprise alloy further comprises manganese, phosphorus, sulfur, silicon, nickel, chromium, copper, aluminum, vanadium, and calcium; with the balance being iron. The alloy experiences a relatively flattened hardenability curve and low martinsite formation.
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Bradford, III John F.
El Hakam Carmel Z.
Nguyen Don Q.
Sullivan Eric C.
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Michener Blake
Neuder William P
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