Patents by Inventor Erik Jan Rooduijn

Erik Jan Rooduijn 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).

  • Patent number: 7666044
    Abstract: Method of supplying oil from a first floating structure to an offloading structure, includes providing a flexible duct extending between the two structures at a water depth of between 50 m and 500 m, the duct including a flexible elastomeric material and having an internal diameter of at least 600 mm and a length of between 1500 and 3000 m, providing at least one pump at the first structure and pumping the oil through the duct at a pressure between 5 bar and at a flow rate between 1000 and 50,000 m3/hr, providing a single flexible duct, and providing a wall thickness of the duct such that at water temperatures between 2° C. and 20° C., the oil has at the first structure an inlet temperature Tin and at the second structure an outlet temperature T0 that Tin-T0 is smaller that or equal to 15° C., preferably smaller than 5° C.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: February 23, 2010
    Assignee: Single Buoy Moorings Inc.
    Inventors: Hein Wille, Erik Jan Rooduijn
  • Patent number: 5797702
    Abstract: The invention provides a method for laying a pipeline on a floor located under water, wherein a pipe string is lowered from the pipe-bedding installation to the floor, characterized in that the part of the pipe string situated between the water surface and the floor is at least partially supported by bearing mechanism which engage on the pipe string, wherein an axial displacement is realized between the bearing mechanism on the one hand and the pipe string on the other.A heavy pipeline can hereby be laid on a deep seabed, for instance at a depth in the order of magnitude of 1-3 km, and/or the capacity of the draw benches on board the pipe-bedding installation can be reduced.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: August 25, 1998
    Assignee: Allseas Group S.A.
    Inventors: Johannes John Cornelis Isbister Drost, Albert Ploeg, Erik Jan Rooduijn