Patent Number: 8,720,612

Title: Cutting element and a method of manufacturing a cutting element

Abstract: The present disclosure relates in one aspect to a cutting element comprising a substrate and a cutting layer disposed on a surface of the substrate. The cutting layer comprises an ultra hard material. The substrate comprises tungsten carbide and a metal binder. The substrate has a magnetic saturation value in the range of from 80% to less than 85%. In another aspect, the magnetic saturation value may increase within the substrate along a gradient, wherein proximal to the interface with the cutting layer, the substrate has a magnetic saturation value in the range of from 80% to less than 85%. Also included are drill bits incorporating such cutting elements. Additionally, the present disclosure relates to methods of manufacturing cutting elements.

Inventors: Corbett; Loel G (Saratoga Springs, UT), Belnap; Daniel J (Pleasant Grove, UT)

Assignee: Smith International, Inc.

International Classification: E21B 10/36 (20060101); E21C 25/04 (20060101)

Expiration Date: 5/13/12018