Patents Represented by Attorney, Agent or Law Firm Robin Nave
  • Viscoelastic surfactant fluids stable at high brine concentrations
    Patent number: 6762154
    Abstract: Present invention relates to high brine carrier fluid, said carrier fluid selected from the group consisting of organic acids, organic acid salts, inorganic salts and combination of one or more organic acids or organic acid salts, a co-surfactant and an amount of a zwitterionic surfactant. The invention also relates to methods of treating a subterranean wellbore, including drilling, hydraulic fracturing, gravel placement, scale removing, mud cake removing, using said high brine carrier fluid.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: July 13, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Bernhard Lungwitz, Mark E. Brady, Sylvie Daniel, Mehmet Parlar, Colin J. Price-Smith, Elizabeth Morris