Patents by Inventor Kurt T. Bush

Kurt T. Bush 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).

  • Fixed cutter bit with backup cutter elements on secondary blades
    Patent number: 8100202
    Abstract: In an embodiment, a drill bit for drilling a borehole comprises a bit body having a bit axis and a bit face. In addition, the drill bit comprises a primary blade extending radially along the bit face. Further, the drill bit comprises a plurality of primary cutter elements mounted to the primary blade. The primary blade is free of backup cutter elements. Still further, the drill bit comprises a secondary blade extending radially along the bit face. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to the secondary blade. In addition, the drill bit comprises a first plurality of backup cutter elements mounted to the secondary blade in a first backup row that trails the primary row. Further, the drill bit comprises a second plurality of backup cutter elements mounted to the secondary blade in a second backup row that trails the first backup row.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: January 24, 2012
    Assignee: Smith International, Inc.
    Inventors: Bala Durairajan, Carl M. Hoffmaster, Michael G. Azar, Kurt T. Bush
  • Fixed Cutter Bit With Backup Cutter Elements on Secondary Blades
    Publication number: 20090266619
    Abstract: In an embodiment, a drill bit for drilling a borehole comprises a bit body having a bit axis and a bit face. In addition, the drill bit comprises a primary blade extending radially along the bit face. Further, the drill bit comprises a plurality of primary cutter elements mounted to the primary blade. The primary blade is free of backup cutter elements. Still further, the drill bit comprises a secondary blade extending radially along the bit face. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to the secondary blade. In addition, the drill bit comprises a first plurality of backup cutter elements mounted to the secondary blade in a first backup row that trails the primary row. Further, the drill bit comprises a second plurality of backup cutter elements mounted to the secondary blade in a second backup row that trails the first backup row.
    Type: Application
    Filed: April 1, 2009
    Publication date: October 29, 2009
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Bala Durairajan, Carl M. Hoffmaster, Michael G. Azar, Kurt T. Bush