Patents by Inventor Johannis Den Boer

Johannis Den Boer 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
  • Marking of pipe joints
    Publication number: 20060087448
    Abstract: An improved method of permanently marking the location of a tubular joint, the method including creating a cavity into the end surface of one of the tubular ends that are to be joined by a forge weld or screw thread connection, inserting a marker into said cavity and subsequently joining the tubular ends.
    Type: Application
    Filed: July 17, 2003
    Publication date: April 27, 2006
    Inventors: Johannis Den Boer, Anthony Cole, Klisthenis Dimitriadis, Djurre Zijsling
  • Forge welding method
    Publication number: 20050236372
    Abstract: The invention relates to a method for forge welding tubulars such that formation of upsets in the welding zone is minimized which involves shaping the tubular ends that are to be welded together into an inwardly sloping configuration such that when the tubular ends are heated during the forge welding process the heated tubular ends deform as a result of thermal expansion into a substantially longitudinally oriented cylindrical shape.
    Type: Application
    Filed: July 17, 2003
    Publication date: October 27, 2005
    Applicant: Shell Oil Company
    Inventors: Per Moe, Per Moe, Johannis Den Boer, Anthony Cole, Klisthenis Dimitriadis, Bjorn Halmrast, Kjell Rabben, Djurre Zijsling
  • Gel release device
    Publication number: 20050082054
    Abstract: The invention relates to a device for holding and releasing an object, such device having: a body with a cavity in which the object is accommodatable; an elastic retaining member for retaining the object in the cavity; and, a pushing member for pushing the object out of the body past the retaining member; wherein the pushing member has a first stimuli responsive gel, which has a volume that varies in response to variation of a selected physical stimulating parameter; and, a controller capable of activating the pushing member by stimulating the first gel.
    Type: Application
    Filed: November 6, 2002
    Publication date: April 21, 2005
    Inventors: Johannis Den Boer, John Stewart
  • 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