Patents by Inventor Alain Ladret

Alain Ladret 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).

  • Scleroglucan based drilling mud
    Patent number: 5612294
    Abstract: Base composition for water-based drilling muds allowing the number and the amount of the other constituents of the mud to be restricted. In addition to the base solvent, fresh water, sea water or salt water, the said base composition comprises scleroglucan as viscosity agent, the mycelium which produced it and bentonite or an equivalent in limited amount.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: March 18, 1997
    Assignee: Elf Aquitaine
    Inventors: Alain Vaussard, Alain Ladret, Alain Donche
  • Application of muds containing scleroglucan to drilling large diameter wells
    Patent number: 5525587
    Abstract: The present inventors found that the addition of scleroglucan, in particular of unrefined scleroglucan, to the water employed as drilling fluid for drilling wells requiring a high flow rate made it possible to limit formation leaching and improved the removal of cuttings.The invention may be applied to drilling of large-diameter wells.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: June 11, 1996
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Alain Ladret, Alain Donche