Barrier coated granules for improved hardfacing material

Details Barrier coated granules for improved hardfacing material Barrier coated granules for improved hardfacing material

2007-12-04

2007-12-04

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S425000, C175S426000, C051S309000

Reexamination Certificate

active

10917855

ABSTRACT:
A hardfacing composition for a drill bit includes a carbide phase made from carbide particles having a barrier coating disposed thereon, and binder alloy. Also, a drill bit includes a steel bit body having hardfacing thereon and having at least one blade thereon, at least one cutter pocket disposed on the blade, at least one cutter disposed in the cutter pocket; and hardfacing applied to at least composition that includes a carbide phase formed from carbide particles having a barrier coating disposed thereon; and a binder alloy.

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United Kingdom Combined Search and Examination Report dated Oct. 25, 2004 (6 pages).
United Kingdom Combined Search and Examination Report dated Feb. 22, 2005 (6 pages).
Canadian Office Action dated Mar. 12, 2007 issued in CA Application No. 2,488,221 (3 pages).

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