Cutting elements and drill bits incorporating the same
AssigneeSmith International, Inc.
InventorsLynn Belnap, Stewart N. Middlemiss
Life of this patent
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Abstract
An ultra-hard cutting element for use in a drill bit, such as a percussion drill bit, a rotary cone drill bit, a drag bit, or a reamer. The ultra-hard cutting element includes a base portion, an extension portion on an end of the base portion, and a lip on an outer surface of the extension portion. At least a portion of the outer surface of the extension portion includes an ultra-hard abrasive material. The ultra-hard abrasive material may be polycrystalline diamond or polycrystalline cubic boron nitride.
Claims24
An ultra-hard cutting element for use in a drill bit, comprising:
- a base portion defining a longitudinal axis;
- an extension portion on an end of the base portion, wherein at least a portion of an outer surface of the extension portion includes an ultra-hard abrasive material;
- and
- a lip on the outer surface of the extension portion, the lip having a length between a first end and a second end.
A drill bit, comprising:
- a shank;
- a bit body on one end of the shank, the bit body defining a plurality of cutter pockets;
- and
- a plurality of ultra-hard cutting elements at least partially received in the plurality of cutter pockets, wherein at least one of the plurality of ultra-hard cutting elements comprises:
- a base portion defining a longitudinal axis;
- an extension portion on an end of the base portion, wherein at least a portion of an outer surface of the extension portion includes an ultra-hard abrasive material;
- and
- a lip on the outer surface of the extension portion, the lip having a length between a first end and a second end.
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Dependencies are inferred from the claim text.