Patents by Inventor Rolf Emil Pensgaard

Rolf Emil Pensgaard 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: 7832473
    Abstract: A method is disclosed for controlling the flow of fluid between a downhole formation and a base pipe located in wellbore proximate the downhole formation. A plurality of chokes are established between the formation and the base pipe to regulate the flow of fluid between the formation and the base pipe. In one embodiment, each choke comprises a nozzle formed in the base pipe. In another embodiment, each choke comprises a nozzle in a housing arranged on the base pipe. A plurality of plugs are pumped downhole for engagement with the nozzles. The pressure in the wellbore is then increased until the plugs engage each nozzle. In an alternative embodiment, plugs are pumped downhole and stop up the housing containing the nozzles. Fluid flow between the base pipe and the downhole formation may be reestablished by dissolving the plugs or by back-flowing the production string to dislodge them.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: November 16, 2010
    Assignee: Schlumberger Technology Corporation
    Inventor: Rolf Emil Pensgaard
  • Publication number: 20080169099
    Abstract: A method is disclosed for controlling the flow of fluid between a downhole formation and a base pipe located in wellbore proximate the downhole formation. A plurality of chokes are established between the formation and the base pipe to regulate the flow of fluid between the formation and the base pipe. In one embodiment, each choke comprises a nozzle formed in the base pipe. In another embodiment, each choke comprises a nozzle in a housing arranged on the base pipe. A plurality of plugs are pumped downhole for engagement with the nozzles. The pressure in the wellbore is then increased until the plugs engage each nozzle. In an alternative embodiment, plugs are pumped downhole and stop up the housing containing the nozzles. Fluid flow between the base pipe and the downhole formation may be reestablished by dissolving the plugs or by back-flowing the production string to dislodge them.
    Type: Application
    Filed: June 26, 2007
    Publication date: July 17, 2008
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Rolf Emil Pensgaard