Patents by Inventor Donald K. Nelsen

Donald K. Nelsen 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).

  • Offshore well test platform system
    Patent number: 4906139
    Abstract: An offshore well test platform system is positionable above one or more underwater wells and comprises a submerged buoy restrained below the surface of the water by a plurality of laterally extending, tensioned cables, a platform structure removably connected to a submerged buoy with an upper portion that extends above the surface of the water, and a flexible riser that connects the well to a well test platform deck above the surface of the water.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: March 6, 1990
    Assignee: Amoco Corporation
    Inventors: Hin Chiu, Donald K. Nelsen