Patents by Inventor Niels J. Rishoj Nielsen

Niels J. Rishoj Nielsen 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).

  • Riser and an offshore system
    Patent number: 9303463
    Abstract: The invention relates to a riser for transporting fluid between an upper facility and a subsea facility. The riser has a center axis and a length along the center axis and comprises an unbonded flexible metal armored riser section and an unbonded flexible composite armored riser section arranged in fluid connection to each other. The metal armored riser section comprises at least two cross-wound tensile armor layers each comprising a plurality of helically wound elongate metal armor elements wound with a winding angle of about 60 degree or less relative to the center axis. The composite armored riser section comprises at least one tensile armor layer comprising a plurality of helically wound elongate composite armor elements wound with a winding angle of about 60 degree or less relative to the center axis. The invention also relates to an offshore system comprising such riser.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: April 5, 2016
    Assignee: NATIONAL OILWELL VARCO DENMARK I/S
    Inventors: Kristian Glejbol, Niels J. Rishoj Nielsen
  • RISER AND AN OFFSHORE SYSTEM
    Publication number: 20150275586
    Abstract: The invention relates to a riser for transporting fluid between an upper facility and a subsea facility. The riser has a center axis and a length along the center axis and comprises an unbonded flexible metal armored riser section and an unbonded flexible composite armored riser section arranged in fluid connection to each other. The metal armored riser section comprises at least two cross-wound tensile armor layers each comprising a plurality of helically wound elongate metal armor elements wound with a winding angle of about 60 degree or less relative to the center axis. The composite armored riser section comprises at least one tensile armor layer comprising a plurality of helically wound elongate composite armor elements wound with a winding angle of about 60 degree or less relative to the center axis. The invention also relates to an offshore system comprising such riser.
    Type: Application
    Filed: June 3, 2013
    Publication date: October 1, 2015
    Applicant: National Oilwell Varco Denmark I/S
    Inventors: Kristian Glejbøl, Niels J. Rishoj Nielsen