Patents by Inventor David A. Hebert

David A. Hebert 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: 9460241
    Abstract: System and method for adjusting the values of the prognostic variables near the interface between a nonhydrostatic, high resolution model embedded in a hydrostatic, coarser resolution model. The system and method condition the outer domain lateral boundary values to enforce conservation of volume when the variables are interpolated onto the inner domain grid. The conditioning adjusts the baroclinic normal velocities at the open boundaries before interpolation. The system and method also include a relaxation scheme which matches the values of the prognostic variables across a zone near the open boundaries of the submesoscale inner domain to prevent the development of discontinuities, reflections and perimeter currents at the periphery of the inner domain.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: October 4, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Patrick C. Gallacher, Michael R. Schaferkotter, David A. Hebert
  • Publication number: 20130197880
    Abstract: System and method for adjusting the values of the prognostic variables near the interface between a nonhydrostatic, high resolution model embedded in a hydrostatic, coarser resolution model. The system and method condition the outer domain lateral boundary values to enforce conservation of volume when the variables are interpolated onto the inner domain grid. The conditioning adjusts the baroclinic normal velocities at the open boundaries before interpolation. The system and method also include a relaxation scheme which matches the values of the prognostic variables across a zone near the open boundaries of the submesoscale inner domain to prevent the development of discontinuities, reflections and perimeter currents at the periphery of the inner domain.
    Type: Application
    Filed: January 30, 2013
    Publication date: August 1, 2013
    Applicant: HE GOVERNMENT OF THE UNITED STATES, AS REPRESENTED BY THE SECRETARY OF NAVY
    Inventors: Patrick C. Gallacher, Michael R. Schaferkotter, David A. Hebert
  • Patent number: 6568474
    Abstract: A method of perforating and gravel packing a wellbore casing, having the following steps: (1) making-up to a pipe string: a packer, a screen, and a perforating apparatus; (2) running-in the pipe string until the perforating apparatus is at a depth of intended perforations; (3) setting the perforating apparatus in the wellbore casing at a depth of intended perforations; and (4) disconnecting the screen and perforating apparatus from the pipe string. A system for perforating and gravel packing a wellbore casing, having: a packer which is mechanically communicable with a service string: a screen in mechanical communication with the packer; a perforating apparatus in mechanical communication with the screen, wherein the screen and perforating apparatus are detachable from the packer; and a tool having at least one casing engaging slip segment, wherein the tool is matable with the perforating apparatus, and wherein the tool is settable in the wellbore casing.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: May 27, 2003
    Assignee: BJ Services, USA
    Inventors: Kevin R. George, Stanley Wall, Marvin Bryce Traweek, Barry Ed Smith, David Joseph Walker, David A. Hebert
  • Publication number: 20020062960
    Abstract: A method of perforating and gravel packing a wellbore casing, having the following steps: (1) making-up to a pipe string: a packer, a screen, and a perforating apparatus; (2) running-in the pipe string until the perforating apparatus is at a depth of intended perforations; (3) setting the perforating apparatus in the wellbore casing at a depth of intended perforations; and (4) disconnecting the screen and perforating apparatus from the pipe string. A system for perforating and gravel packing a wellbore casing, having: a packer which is mechanically communicable with a service string: a screen in mechanical communication with the packer; a perforating apparatus in mechanical communication with the screen, wherein the screen and perforating apparatus are detachable from the packer; and a tool having at least one casing engaging slip segment, wherein the tool is matable with the perforating apparatus, and wherein the tool is settable in the wellbore casing.
    Type: Application
    Filed: March 27, 2001
    Publication date: May 30, 2002
    Inventors: Kevin R. George, Tanley Wall, Marvin Bryce Traweek, Barry Ed Smith, David Joseph Walker, David A. Hebert