Cutting elements for drill bits
United States Patent T970002
a cutting element for mounting in a rolling cone cutter of a rock drill bit has a notch in the periphery of its base for improved retention of the cutting element in the rolling cone cutter. The longitudinal axis of the notch is essentially transverse to the direction of insertion of the cutting element into the rolling cone cutter. To maximize the effectiveness of the notch in improving retention of the cutting element, preferably the notch is sharp lipped.

Inventors:
Kidder, Harry E. (Rolling Hills, CA)
Evans, Robert F. (La Habra, CA)
Application Number:
05/833480
Publication Date:
05/02/1978
Filing Date:
09/15/1977
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Assignee:
Smith International, Inc. (Newport Beach, CA)
Primary Class:
175/374
Other Classes:
407/120, 175/371, 175/426
International Classes:
E21B10/22; E21B10/52; E21B10/08; E21B10/46