Two-cone drill bit with enhanced stability

Details Two-cone drill bit with enhanced stability Two-cone drill bit with enhanced stability

2008-01-07

2009-06-23

Wright, Giovanna C (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S355000, C175S376000, C175S398000

Reexamination Certificate

active

07549488

ABSTRACT:
A two-cone drill bit that exhibits improved stability. In one embodiment, the two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of cutting elements arranged on the roller cones such that a bottom hole coverage greater than about 17 percent is achieved per revolution of the two-cone drill bit.

REFERENCES:
patent: RE34526 (1994-02-01), Pessier
patent: 7316281 (2008-01-01), Boudrare et al.

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