Patents by Inventor Loel G. Corbett

Loel G. Corbett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9956666
    Abstract: A cutting element includes a substrate and a cutting layer disposed on a surface of the substrate. The cutting layer includes an ultra hard material. The substrate includes 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%. Drill bits incorporating such cutting elements and methods of manufacturing such cutting elements are described.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: May 1, 2018
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Loel G. Corbett, J. Daniel Belnap
  • Publication number: 20140150351
    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 incoiporating such cutting elements. Additionally, the present disclosure relates to methods of manufacturing cutting elements.
    Type: Application
    Filed: February 6, 2014
    Publication date: June 5, 2014
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Loel G. Corbett, J. Daniel Belnap
  • Patent number: 8720612
    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.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: May 13, 2014
    Assignee: Smith International, Inc.
    Inventors: Loel G Corbett, Daniel J Belnap
  • Publication number: 20100126779
    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.
    Type: Application
    Filed: November 23, 2009
    Publication date: May 27, 2010
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Loel G. Corbett, J. Daniel Belnap