Patents by Inventor Dan Belnap

Dan Belnap 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).

  • Cutting element arrangement for single roller cone bit
    Publication number: 20050109543
    Abstract: A cutting element arrangement for a single roller cone bit includes both at least one substantially non-planar cutting element and at least one substantially planar cutting element. The substantially non-planar cutting element is disposed on an inner row of the single roller cone and the substantially planar cutting element is disposed on an outer row of the single roller cone. With such an arrangement, the substantially non-planar inner row cutting elements effectively penetrate formations while the substantially planar outer row cutting elements maintain bore hole gage.
    Type: Application
    Filed: June 18, 2004
    Publication date: May 26, 2005
    Inventors: George Witman, Peter Wilson, Richard Butland, Dan Belnap, John Herman, Ronald Birne-Browne, Per Nese, Louis Loiselle
  • Toughness optimized insert for rock and hammer bits
    Patent number: 6651757
    Abstract: An insert for a drill bit is disclosed which includes an exposed surface having a contact portion adapted to periodically contact earthen formation. The contact portion includes a polycrystalline diamond material having a hardness in the range of about 2000 HV to about 3000 HV. In some embodiments, the polycrystalline diamond material includes a composite having a first phase material including polycrystalline diamond and a second phase material selected from the group of oxide particulates metal carbides, and metallic particulates, nitrides, and mixtures of thereof.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: November 25, 2003
    Assignee: Smith International, Inc.
    Inventors: Dan Belnap, Nathan Anderson, Michael A. Siracki, Sujian Huang
  • Toughness optimized insert for rock and hammer bits
    Publication number: 20020043407
    Abstract: An insert for a drill bit is disclosed which includes an exposed surface having a contact portion adapted to periodically contact earthen formation. The contact portion includes a polycrystalline diamond material having a hardness in the range of about 2000 HV to about 3000 HV. In some embodiments, the polycrystalline diamond material includes a composite having a first phase material including polycrystalline diamond and a second phase material selected from the group of oxide particulates metal carbides, and metallic particulates, nitrides, and mixtures of thereof.
    Type: Application
    Filed: May 16, 2001
    Publication date: April 18, 2002
    Inventors: Dan Belnap, Nathan Anderson, Michael A. Siracki, Sujian Huang