Rotationally indexable cutting elements and drill bits therefor
July 18, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInsert retention and cooling apparatus for drag bits Drill bit and method of renewing drill bit cutting face Replaceable insert stud for drilling bits Replaceable cutter using internal ductile metal receptacles Drill bit cutter mounting system providing selectable orientation of the cutting element Cutting elements with enhanced stiffness and arrangements thereof on earth boring drill bits Mechanically locked drill bit components Apparatus for mounting PCD compacts Cutter element with non-linear, expanded crest Spiral wave bladed drag bit InventorAssigneeApplicationNo. 11879974 filed on 07/18/2007US Classes:175/368Releasable cutter securing deviceExaminersPrimary: Gay, Jennifer HAssistant: Harcourt, Brad Attorney, Agent or FirmForeign Patent References
International ClassE21B 10/46AbstractA cutting element for use with a drill bit includes a substrate having a longitudinal axis, a lateral surface substantially symmetric about the longitudinal axis and one or more key elements coupled to the lateral surface. The lateral surface lies between an insertion end and a cutting end of the substrate. The one or more key elements are substantially axially aligned with the longitudinal axis and configured to selectively rotationally locate the substrate in a pocket. A drill bit configured for retaining a cutting element having one or more key elements is also disclosed.Other References
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