Patents by Inventor Jan Vollebregt

Jan Vollebregt 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).

  • FORGE WELDING TUBULARS
    Publication number: 20070158390
    Abstract: Tubular ends are heated to a predetermined temperature above 1200 degrees Celsius and surrounded by a shield gas when the tubular ends are pressed together to form forge welded tubular ends. The forge welded tubular ends are then cooled down rapidly from said temperature above 1200 to at most 600 degrees Celsius within 3 minutes after the forge welding operation.
    Type: Application
    Filed: November 7, 2006
    Publication date: July 12, 2007
    Inventors: Mark Anderson, Johannis Den Boer, Anthony Cole, Klisthenis Dimitriadis, Jan Vollebregt, Djurre Zijsling
  • Wellbore device for selective transfer of fluid
    Publication number: 20050252651
    Abstract: A wellbore device is provided which includes a fluid passage for transferring fluid between an earth formation and a surface facility, and a body transferable from a first mode to a second mode upon contact of the body with a selected fluid. The body is arranged so as to substantially close the fluid passage upon transfer of the body from the first mode to the second mode due to contact of the body with the selected fluid.
    Type: Application
    Filed: September 5, 2003
    Publication date: November 17, 2005
    Applicant: Shell Oil Company
    Inventors: Martin Bosma, Erik Cornelissen, Jan Vollebregt, John Dewar, David Mason
  • Joining expandable tubulars
    Publication number: 20050050726
    Abstract: A method of joining expandable tubulars includes joining the tubulars by forge welding and flushing a reducing flushing gas around the heated tubular ends during at least part of the forge welding operation such that oxides are removed from the forge welded tubular ends and the amount of irregularities between the forge welded tubular ends is limited.
    Type: Application
    Filed: July 17, 2003
    Publication date: March 10, 2005
    Inventors: Mark Anderson, Johannis Den Boer, Anthony Cole, Klisthenis Dimitriadis, Jan Vollebregt, Djurre Zigsling