Cutting elements of gage row and first inner row of a drill bit

Details Cutting elements of gage row and first inner row of a drill bit Cutting elements of gage row and first inner row of a drill bit

2008-05-06

2008-05-06

Tsay, Frank (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S426000, C076S108200

Reexamination Certificate

active

07367413

ABSTRACT:
A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gage curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.

REFERENCES:
patent: 4058177 (1977-11-01), Langford et al.
patent: 4858707 (1989-08-01), Jones et al.
patent: 5201376 (1993-04-01), Williams
patent: 5813485 (1998-09-01), Portwood
patent: 6003623 (1999-12-01), Miess
patent: 6161634 (2000-12-01), Minikus et al.

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