Hybrid drill bit with secondary backup cutters positioned...

Details Hybrid drill bit with secondary backup cutters positioned... Hybrid drill bit with secondary backup cutters positioned...

2008-12-19

2011-11-01

Stephenson, Daniel P (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S431000

Reexamination Certificate

active

08047307

ABSTRACT:
A hybrid drill bit may have a bit body, at least one blade extending longitudinally and radially outward from the face, at least one rolling cutter assembly mounted on the bit body, at least one primary cutter, and at least one cutter set including a first cutter and a second cutter. The cutter set may be positioned to substantially follow the at least one primary cutter along the cutting path upon rotation of the bit body. At least one cutter of the cutter set may have a high side rake angle.

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