Patents by Inventor Bernard M. Piot

Bernard M. Piot 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).

  • Cement compositions for cementing wells, allowing pressure gas-channeling in the cemented annulus to be controlled
    Patent number: 4537918
    Abstract: The invention relates to cement compositions for cementing wells, which allow pressure gas-channeling to be effectively controlled up to more than about 485.degree. F. The cement composition contains a styrene-butadiene latex and a stabilizer. The film of latex interrupts gas-channeling after an extremely brief path.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: August 27, 1985
    Assignee: Etudes et Fabrication Dowell Schlumberger
    Inventors: Philippe A. Parcevaux, Bernard M. Piot, Claude J. Vercaemer