Patents by Inventor Jean J. Fery

Jean J. Fery 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).

  • Method of tracing a well drilling mud
    Patent number: 4352674
    Abstract: In a method of tracing a well drilling mud by determining the concentration of a tracer ion in samples of filtrate from a drilling mud which contains a predetermined concentration of the tracer ion, the improvement wherein the tracer ion is the acetate ion and is present in the drilling mud in a concentration of about 1.10.sup.-3 to about 5.10.sup.-2 ions per liter.
    Type: Grant
    Filed: January 6, 1981
    Date of Patent: October 5, 1982
    Assignee: Compagnie Francaise des Petroles
    Inventor: Jean J. Fery