Patents by Inventor John M. Shaughnessy

John M. Shaughnessy 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).

  • Dynamically positioned, concentric riser, drilling method and apparatus
    Patent number: 6273193
    Abstract: A dynamically positioned, concentric riser, drilling system comprising a dynamically positioned drilling unit operable to float at least partially above the surface of a body of water, a first, outer, low-pressure, marine riser extending from the drilling unit into the body of water, a tensioning system to support the first marine riser, a second, inner, high-pressure, marine riser concentrically extending within the first, outer, low-pressure, marine riser, a surface blowout preventor, a lower marine riser package, a subsea blowout preventor, and a connector at the base of the lower marine riser package to release the risers from the wellhead in the event of a loss of station of the drilling unit.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: August 14, 2001
    Assignee: Transocean Sedco Forex, Inc.
    Inventors: Robert P. Hermann, Robert J. Scott, John M. Shaughnessy