Steel tooth drill bit with improved tooth breakage resistance

Details Steel tooth drill bit with improved tooth breakage resistance Steel tooth drill bit with improved tooth breakage resistance

2007-05-18

2010-02-02

Gay, Jennifer H (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S425000

Reexamination Certificate

active

07654346

ABSTRACT:
A drill bit having steel teeth is provided with a combination of hardfacing materials on the teeth. The bases of the teeth are hardfaced with nickel-based materials to significantly reduce any potential cracking therein. Portions of the supporting cones adjacent the teeth also may be fabricated with the nickel-based hardfacing. All other portions of the teeth are hardfaced with iron-based materials.

REFERENCES:
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patent: 5755299 (1998-05-01), Langford, Jr. et al.
patent: 6029759 (2000-02-01), Sue et al.
patent: 6196338 (2001-03-01), Slaughter et al.
patent: 6360832 (2002-03-01), Overstreet et al.
patent: 6374704 (2002-04-01), Scott et al.
patent: 6766870 (2004-07-01), Overstreet

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