Layered hardfacing, durable hardfacing for drill bits
AssigneeSmith International, Inc.
InventorsKumar Kembaiyan, Madapusi Keshavan, Alysia White, Brian White
Life of this patent
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Abstract
A drill bit having a bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade, at least one cutter disposed in the at least one cutter pocket, hardfacing applied to at least a selected portion of the drill bit is shown and described. The hardfacing includes a first hardfacing layer disposed on the selected portion of the drill bit, a second hardfacing layer disposed on the first hardfacing layer, wherein the first hardfacing layer has a hardness different than a hardness of the second hardfacing layer.
Claims26
A drill bit comprising:
- a bit body having at least one blade thereon;
- at least one cutter pocket disposed on the at least one blade;
- at least one cutter disposed in the at least one cutter pocket;
- and
- hardfacing applied to at least a selected portion of the drill bit, the hardfacing comprising:
- a first hardfacing layer disposed on the selected portion of the drill bit;
- and
- a second hardfacing layer disposed on the first hardfacing layer,
- wherein the first hardfacing layer and the second hardfacing layer differ with respect to at least one property.
A method of applying hardfacing, comprising:
- applying a first hardfacing layer to at least a selected portion of a drill bit;
- and
- applying a second hardfacing layer on the first hardfacing layer,
- wherein the applying the first hardfacing layer differs from the applying the second hardfacing layer, such that the first hardfacing layer and the second hardfacing layer differ with respect to at least one property.
A hardfacing for a drill bit assembly, comprising:
- a first hardfacing layer;
- and
- a second hardfacing layer disposed next to the first hardfacing layer, wherein the first hardfacing layer and the second hardfacing layer differ with respect to at least one property.
The hardfacing of claim 23, wherein the hardfacing is located on a selected portion of the drill bit assembly.
The hardfacing of claim 24, wherein the drill bit assembly includes a plurality of stabilizer blades and the hardfacing is located on a selected portion of at least one of the plurality of stabilizer blades.
Dependencies are inferred from the claim text.