Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2008-06-05
2011-11-01
Neuder, William P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S057000
Reexamination Certificate
active
08047309
ABSTRACT:
Earth-boring tools include at least one up-drill feature disposed on a transition surface so as to be passive during down drilling and active during up drilling and/or back reaming operations. Systems for down drilling and up drilling with drill bits comprising one or more up-drill features are also disclosed. Furthermore, methods for forming a borehole with an earth-boring tool including such up-drill features and for forming an earth-boring tool comprising such up-drill features are also disclosed.
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Buske Robert J.
Gilmore Kenneth E.
Overstreet James L.
Stevens John H.
Baker Hughes Incorporated
Michener Blake
Neuder William P
TraskBritt
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