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US 10,309,156 B2Granted
Cutting structures for fixed cutter drill bit and other downhole cutting tools
AssigneeSmith International, Inc.
InventorsMichael G. Azar, Bala Durairajan, Madapusi K. Keshavan
Life of this patent
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Abstract
A cutting tool may include a tool body, blades extending from the tool body, and primary cutting elements and backup cutting elements are on each of blades. The backup cutting elements may be behind and at approximately the same radial distance from the axis of the tool body as a corresponding primary cutting element, where the primary cutting elements include cutting elements having a first non-planar shape and the backup cutting elements include cutting elements having a second, different non-planar shape.
Claims8
A cutting tool, comprising:
- a tool body;
- a plurality of blades extending from the tool body;
- and
- a plurality of differently shaped, cylindrically-bodied, non-planar cutting elements on each of the plurality of blades, the plurality of differently shaped non-planar cutting elements including cutting elements having a cutting end with a first non-planar shape and cutting elements having a cutting end with a second, different non-planar shape, the cutting elements having the first non-planar shape and the cutting elements having the second non-planar shape being arranged in an alternating manner along at least a portion of at least one of the plurality of blades, such that the cutting elements alternate within a leading, primary row, wherein the cutting elements having the first non-planar shape are pointed cutting elements and the cutting elements having the second non-planar shape are ridge cutting elements.
1 more element
Dependencies are inferred from the claim text.