Patents by Inventor Alain Martignon

Alain Martignon 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).

  • Process for enzyme pretreatment of drill cuttings
    Patent number: 5725771
    Abstract: Process for the treatment of drilling muds recovered at the surface of the ground, especially synthetic muds, characterized in that it comprises at least one stage of hydrolysis of said mud by means of a lipase.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: March 10, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Sophie Aliphat, Frederic Perie, Christian Zurdo, Alain Martignon
  • Device for evaluation of the lubricating charcteristics of a drilling mud
    Patent number: 5616842
    Abstract: Device for evaluation of the lubricating characteristics of a drilling mud, including a vessel (14) provided with an entry (52) and an exit (58) for a mud to be analysed, a measuring shoe (40) mounted inside the vessel (14) and intended to be set in rotation, and at least one measuring sensor capable of measuring the stresses generated during a contact between the shoe and an internal surface of the vessel. According to the invention the sensor is mounted inside the shoe.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: April 1, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jean-Francois Armengaud, Alain Martignon, Simeon Cortiade, Jacques Marti