Patents by Inventor Karl A. Lutgring

Karl A. Lutgring 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).

  • Method and composition for sweep of cuttings beds in a deviated borehole
    Patent number: 6290001
    Abstract: A sweep material is disclosed comprising barium sulfate that has been ground and sieved, preferably in the range of about −95% 30 mesh to about +95% 100 mesh. The sweep material is added to and circulated with the drilling fluid during drilling of a deviated, directional or horizontal well to remove cuttings beds accumulated on the lower side of the well. After the drill cuttings are dislodged, the drilling fluid is sieved or screened to remove the barium sulfate to avoid a change in density of the fluid. The drilling operation does not have to be stopped during the sweep or cleaning treatment.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: September 18, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Gary C. West, Rob Valenziano, Karl A. Lutgring