Patents by Inventor Guillem Solé Ristol

Guillem Solé Ristol 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).

  • Use of anionic dispersion polymers as viscosity modifiers in aqueous drilling fluids
    Patent number: 6831042
    Abstract: An aqueous drilling fluid used in drilling wells through subterranean formations having a pH of between about 7 and about 12 and a viscosity of from about 20 to about 80 sec (Marsch cone) which is prepared by admixing fresh water, brine or seawater with about 0.02 lb to about 2.5 lb per barrel, based on polymer actives, of one or more anionic dispersion polymers, wherein the anionic dispersion polymers are composed of about 2 to about 98 mole percent of one or more anionic monomers and from about 98 to about 2 mole percent of one or more nonionic monomers and wherein the anionic dispersion polymers have a RSV of from about 10 to about 50 dL/g, a method of drilling a well bore through a subterranean formation and a method of viscosifying an aqueous drilling fluid.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: December 14, 2004
    Assignee: Nalco Company
    Inventors: Guillem Solé Ristol, Cathy C. Johnson
  • Use of anionic dispersion polymers as viscosity modifiers in aqueous drilling fluids
    Publication number: 20040005987
    Abstract: An aqueous drilling fluid used in drilling wells through subterranean formations having a pH of between about 7 and about 12 and a viscosity of from about 20 to about 80 sec (Marsch cone) which is prepared by admixing fresh water, brine or seawater with about 0.02 lb to about 2.5 lb per barrel, based on polymer actives, of one or more anionic dispersion polymers, wherein the anionic dispersion polymers are composed of about 2 to about 98 mole percent of one or more anionic monomers and from about 98 to about 2 mole percent of one or more nonionic monomers and wherein the anionic dispersion polymers have a RSV of from about 10 to about 50 dL/g, a method of drilling a well bore through a subterranean formation and a method of viscosifying an aqueous drilling fluid.
    Type: Application
    Filed: June 17, 2002
    Publication date: January 8, 2004
    Inventors: Guillem Sole Ristol, Cathy C. Johnson