Abrasive cutting element with increased performance

Details Abrasive cutting element with increased performance Abrasive cutting element with increased performance

1997-09-02

1999-07-27

Eley, Timothy V.

Abrading

Rigid tool

Rotary cylinder

407118, 175428, 175432, 451551, B24B 2123, B24B 2112

Patent

active

059280719

ABSTRACT:
A polycrystalline diamond cutting element has a non-planar, non-linear interface between a substrate and a table. The substrate has one or more protrusions mounted on the surface of the substrate and in spaced relationship. Each protrusion has a generally curved shape such as a delta or triangular shape that extends from the center of the substrate toward the perimeter of the substrate. The depth of the groove between protrusions generally increases along the path toward the perimeter of the element. Similarly, the depth of each protrusion from groove to groove varies along the path toward the perimeter of the element. A thicker, superhard layer such as a diamond layer is provided toward the circle of the element to increase working life. The resulting cutting element is symmetrical about the central axis to alleviate the need for proper orientation of the cutting element during assembly into a drill bit. In another embodiment, a depression is used in place of the protrusion to form a substrate. In the second embodiment, the width of the depression as well as the depth of walls between depressions generally increases along the path toward the perimeter of the element.

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