Patents Assigned to Coatex S.A.
  • Composition cimentaire hydraulique a prise retardee pour cimentation a hautes temperature et pression
    Patent number: 4681634
    Abstract: Hydraulic cement composition with delayed setting, intended to be employed in an environment which may be under extreme temperature, pressure and salinity conditions, the composition being characterized in that it incorporates(a) a saline or nonsaline aqueous liquid phase,(b) at least one hydraulic cement,(c) a setting-retarder adjuvant preserving and/or improving the rheological properties, a water-soluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: July 21, 1987
    Assignees: Coatex S.A., Total Compagnie Francaise des Petroles S.A.
    Inventors: Yves Roca, Jacky Rousset, Pierre Bouchut, Marie-Christine Leblanc, Daniel Baffreau