Patents by Inventor Jean-Michel Casabonne

Jean-Michel Casabonne 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).

  • High temperature retarders for oil field cements, cement slurries and corresponding cementing processes
    Patent number: 5503671
    Abstract: The invention relates to the cementing of high temperature wells. A cement retarder comprises a phosphonic acid derivative combined with borax in a weight ratio of phosphonic acid derivative to borax of about 0.025 to about 0.2. A long pumping time is realized with rapid compressive strength development following placement.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: April 2, 1996
    Assignee: Dowell, a division of Schlumberger Technology Corporation
    Inventors: Jean-Michel Casabonne, Marc Jouve, Erik Nelson