Patents by Inventor Patrick Isambourg

Patrick Isambourg 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).

  • Application of scleroglucan muds to drilling deviated wells
    Patent number: 5330015
    Abstract: A method for drilling deviated or horizontal wells is facilitated by the use of a scleroglucan-containing aqueous drilling mud. The use of such drilling muds is environmentally and economically advantageous over the use of oil-based drilling muds and is superior to the use of other aqueous-based drilling muds in terms of lubricating power and carrying capacity. Preferably the drilling mud contains unrefined scieroglucan.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: July 19, 1994
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Alain Donche, Alain Vaussard, Patrick Isambourg
  • Scleroglucan-based compositions and their use as a cementation spacer
    Patent number: 5306340
    Abstract: Use of scleroglucan alone or of mixtures of scleroglucan with a polyalcohol or a dialdehyde as cementation spacers during oil drilling operations.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: April 26, 1994
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Alain Donche, Patrick Isambourg