Patents by Inventor Johannes John Cornelis Isbister Drost

Johannes John Cornelis Isbister Drost 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).

  • Installation for laying a pipeline on a floor located under water, bearing means and terminal
    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