Patents by Inventor David Gardner Oxnevad

David Gardner Oxnevad 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).

  • Tubing system for an oil or gas well
    Patent number: 6286595
    Abstract: A tubing system for use in an oil or gas well includes a tubing, provided with a holder portion; a casing, around the tubing; a packer, disposed in an annulus defined by the tubing and the casing; and a telescopic extension, positioned within the tubing and extendable beyond a distal portion of the tubing. The telescopic extension is provided with structures for fastening the telescopic extension to the holder portion of the tubing, and structures for accepting a tool by which the telescopic extension is axially displaceable to withdraw the telescopic extension from the distal portion of the tubing.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: September 11, 2001
    Assignee: Maritime Well Service AS
    Inventors: David Gardner Oxnevad, Nils Reimers, Terje K. Bjerkeli, Morten Talgo, Truls Fallet