Cutting element with a non-planar, non-linear interface
AssigneeSmith International, Inc.
InventorsJohn Barry Yorston, Deepthi Raj Setlur
Life of this patent
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Abstract
A cutting element has a substrate with a non-planar, non-linear surface bonded to a superhard element. The substrate provides one or more non-linear grooves radially mounted in spaced relationships on the surface of the substrate. Each groove has a generally curved shape that unfurls from a first circle on the substrate towards a perimeter of the substrate. The groove shape is defined by complex functions, examples of which include high order polynomials and involutes. The depth and width of the groove varies, generally in an increasing manner, along the path from the first circle towards the substrate perimeter. Further, the pitch of the groove also varies along the path from the first circle towards the substrate perimeter.
Claims22
A cutting element, comprising:
- an abrasive layer;
- a base bonded to the abrasive layer, the base having a non-linear surface with a first set of non-planar, non-linear grooves concentrically formed on the surface, each of the non-planar, non-linear grooves having a non-linear wall, where a vertical cross-section of the base is asymmetrical.
A cutting bit, comprising;
- a body;
- and
- a plurality of cutters bonded to the body, each cutter including a base having a non-linear surface;
- and
- a first set of non-planar, non-linear grooves concentrically formed on the surface, each of the non-planar, non-linear grooves having a non-linear wall, where a vertical cross-section of the base is asymmetrical.
A method for forming a cutting element having one or more non-planar, non-linear grooves on a surface of the cutting element, the method comprising:
- specifying an initial profile of the groove;
- generating a high order polynomial expression representative of the initial profile;
- adjusting one or more co-efficients of the high order polynomial expression to satisfy predetermined end conditions;
- and
- generating the cutting element using the high order polynomial expression.
A cutting element, comprising:
- an abrasive layer;
- a base bonded to the abrasive layer, the base having a non-linear surface with a first set of non-planar, non-linear projections concentrically formed on the surface, each of the non-planar, non-linear projections having a non-linear wall, where a vertical cross-section of the base is asymmetrical.
A method for forming a cutting element having one or more non-planar, non-linear projections on a surface of the cutting element, the method comprising:
- specifying an initial profile of the one or more projections;
- generating a high order polynomial expression representative of the initial profile;
- adjusting one or more coefficients of the high order polynomial expression to satisfy predetermined end conditions;
- and
- generating the cutting element using the high order polynomial expression.
Dependencies are inferred from the claim text.