Patents by Inventor Jean-Pierre Parant

Jean-Pierre Parant 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).

  • Devices for drilling branched wells
    Patent number: 4800966
    Abstract: A device for drilling lateral boreholes from a cased parent well comprises selecting and coupling means adapted to cooperate with a deflection unit placed within the parent well. The selecting and coupling means are mounted at the lower end of an extension unit formed by interassembled tubular elements. The upper end of the extension unit is rigidly fixed to a suspension swivel within the wellhead and at least one slip joint is interposed between two tubular elements. The internal diameter of each tubular element is such that a drilling packer can be housed within the tubular elements.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: January 31, 1989
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Jean-Pierre Parant, Christian Mariotti, Patrick Rousselet