Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2006-03-14
2006-03-14
Gay, Jennifer H. (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S374000
Reexamination Certificate
active
07011170
ABSTRACT:
An earth boring bit has rolling cones rotatably mounted to the bit legs. Each cone has conical bands extending around the exterior. Holes are formed in each of the bands. Compacts are press-fitted into the holes, each having a cutting tip that projects from the conical band. Flats are formed in the conical bands, each flat extending between adjacent compacts.
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Ledgerwood, III Leroy W.
Marvel Timothy K.
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Gay Jennifer H.
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