Patents by Inventor David Burkhead

David Burkhead 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).

  • Diverter plugs for use in well bores and associated methods of use
    Patent number: 7350578
    Abstract: Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a second end; a compressible body attached to and surrounding a longitudinal portion of the mandrel; and a sealing nose attached to the first end of the mandrel. In certain embodiments, systems for achieving zonal isolation of a casing string in a well bore may comprise a diverter plug comprising a mandrel having a first end and a second end, a compressible body attached to and surrounding a longitudinal portion of the mandrel, and a sealing nose attached to the first end of the mandrel; and a landing collar sized to mate with a portion of the sealing nose of the diverter plug. Associated methods are also provided.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: April 1, 2008
    Assignees: Halliburton Energy Services, Inc., ConocoPhillips Company
    Inventors: David D. Szarka, William W. Gilbert, David Burkhead, Henry E. Rogers, Nicholas C. Braun, Todd D. Cooper, John Johnson
  • Diverter plugs for use in well bores and associated methods of use
    Publication number: 20070095538
    Abstract: Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a second end; a compressible body attached to and surrounding a longitudinal portion of the mandrel; and a sealing nose attached to the first end of the mandrel. In certain embodiments, systems for achieving zonal isolation of a casing string in a well bore may comprise a diverter plug comprising a mandrel having a first end and a second end, a compressible body attached to and surrounding a longitudinal portion of the mandrel, and a sealing nose attached to the first end of the mandrel; and a landing collar sized to mate with a portion of the sealing nose of the diverter plug. Associated methods are also provided.
    Type: Application
    Filed: November 1, 2005
    Publication date: May 3, 2007
    Inventors: David Szarka, William Gilbert, David Burkhead, Henry Rogers, Nicholas Braun, Todd Cooper, John Johnson