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US 2006/0219439 A1Published application
Stress relief feature on PDC cutter
AssigneeSmith International, Inc.
InventorsYuelin Shen, John Zhang
Life of this patent
Estimating the term…
Abstract
A cutter having a base portion, an ultrahard layer disposed on the base portion, and at least one relief groove formed on an outer surface of the cutter. The at least one relief groove is configured to form a relief gap between the ultrahard layer and an inside surface of a cutter pocket.
Claims9
A cutter comprising:
- a base portion;
- an ultrahard layer disposed on said base portion;
- and
- at least one relief groove formed on an outer surface of the cutter,
- wherein the at least one relief groove is configured to form a relief gap between at least one portion of the ultrahard layer and an inside surface of a cutter pocket.
2 more elements
A drill bit comprising:
- a bit body having at least one cutter pocket;
- and
- at least one cutter disposed in the at least one cutter pocket, the at least one cutter comprising a base portion, an ultrahard layer disposed on said base portion, and at least one relief groove formed on an outer surface of the cutter, wherein the at least one relief groove is configured to form a relief gap between at least a portion of the ultrahard layer and an inside surface of the at least one cutter pocket.
A method of drilling, comprising:
- contacting a formation with a drill bit, wherein the drill bit comprises a bit body having at least one cutter pocket;
- and at least one cutter disposed in the at least one cutter pocket, the at least one cutter comprising a base portion, an ultrahard layer disposed on said base portion, and at least one relief groove formed on an outer surface of the cutter, wherein the at least one relief groove is configured to form a relief gap between at least a portion of the ultrahard layer and an inside surface of the at least one cutter pocket of a blade.
Dependencies are inferred from the claim text.