Patents by Inventor Richard Giroux

Richard Giroux 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 apparatus to reduce downhole surge pressure using hydrostatic valve
    Patent number: 6834726
    Abstract: An apparatus for reducing pressure surges in a wellbore comprising a body having a bore therethrough, the bore providing a fluid path for wellbore fluid between a first and second end of the body, at least one fluid path permitting the wellbore fluid to pass between the bore and an annular area formed between an outer surface of the body and the walls of a wellbore therearound, and a number of closure mechanisms whereby the at least one fluid path is selectively closable to the flow of fluid.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: December 28, 2004
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Richard Giroux, David M. Haugen, David Hosie
  • Method and apparatus to reduce downhole surge pressure using hydrostatic valve
    Publication number: 20030221837
    Abstract: An apparatus for reducing pressure surges in a wellbore comprising a body having a bore therethrough, the bore providing a fluid path for wellbore fluid between a first and second end of the body, at least one fluid path permitting the wellbore fluid to pass between the bore and an annular area formed between an outer surface of the body and the walls of a wellbore therearound, and a number of closure mechanisms whereby the at least one fluid path is selectively closable to the flow of fluid.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 4, 2003
    Inventors: Richard Giroux, David M. Haugen, David Hosie