Patents by Inventor Paul Laffont

Paul Laffont 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 pipe for pivotally attached structure used to extract petroleum from beneath a body of water
    Patent number: 4058137
    Abstract: A riser pipe consists of a plurality of sections of production pipe which are centered and free to slide axially in a guide shaft. The guide shaft is fixed to a pivoted structure and the riser pipe comprises a lower section which is connected at one end to piping at the bottom of the water by means of a remotely controlled releasable connector and at the other end to the penultimate section of the pipe by a connector which is longitudinally slidable to the said guide shaft. The bending stresses on the pipe may be distributed over the length of a lowermost section which may be removed and replaced from the surface.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: November 15, 1977
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Jacques de Saint Palais, Paul Laffont, Jean Mourlevat