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US 7,451,838 B2Granted
High energy cutting elements and bits incorporating the same
AssigneeSmith International, Inc.
InventorMadapusi K. Keshavan
Life of this patent
Estimating the term…
Abstract
High energy sheer cutting elements and bits incorporating the same are provided. The cutting elements have at least a portion of their cutting layers which will be exposed to high temperatures during drilling formed from a PCBN material capable of operating at temperatures of at least 1000° C.
Claims19
A bit for drilling earth formations, said bit having a shear cutting element mounted thereon, the shear cutting element comprising:
- a substrate;
- a cutting layer over the substrate comprising a PCBN portion for contacting a formation during drilling, wherein said PCBN portion has a thermal gradient ranging from about 200 to 2000° C./mm.
Dependencies are inferred from the claim text.