Drill bits and tools for subterranean drilling, methods of...

Details Drill bits and tools for subterranean drilling, methods of... Drill bits and tools for subterranean drilling, methods of...

2009-04-22

2011-12-20

Wright, Giovanna (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S057000, C175S426000

Reexamination Certificate

active

08079430

ABSTRACT:
Drill bits for subterranean drilling comprising a bit body including at least one blade that includes a blade face comprising a contact zone and a sweep zone are disclosed. In particular, drill bits including at least one blade that extends at least partially over a nose region of the bit body, a shoulder region of the bit body and a gage region of the bit body and that include a sweep zone that rotationally trails the contact zone with respect to a direction of intended bit rotation about a longitudinal axis of the bit body and include a contact zone that defines a range of about 90% to about 30% of the blade face surface area is disclosed. Additionally, drill bits comprising a sweep zone located at least partially within a gage region are disclosed. Also, methods of off-center drilling and methods of manufacturing drill bits are disclosed.

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