Patents by Inventor Nathalie Monfreux-Gaillard

Nathalie Monfreux-Gaillard 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).

  • Reversible emulsions stabilized by amphiphilic polymers
    Patent number: 7928039
    Abstract: The invention concerns modified hydrophobic polyelectrolytes by amide formation of a hydrophilic skeleton by n-alkylamines whereof the alkyl chain comprises 6 to 22 carbon atoms. Preferably, the amide formation is obtained by di-n-dodecylamine. The hydrophilic skeleton is preferably a sodium polyacrylate or polyacrylic acid corresponding to a statistical acrylate-AMPS copolymer. Said polymers can be used for stabilizing direct or invert emulsions likely to be destabilized or inverted by a modification in the degree of salinity of the aqueous phase or a pH modification. The invention is particularly useful for stabilizing oil drilling fluids or the like in particular drilling, fracturation, acidification or completion fluids.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: April 19, 2011
    Assignee: M-I L.L.C.
    Inventors: Nathalie Monfreux-Gaillard, Patrick Perrin, Françoise LaFuma, Christopher Sawdon
  • REVERSIBLE EMULSIONS STABILIZED BY AMPHIPHILIC POLYMERS
    Publication number: 20080011485
    Abstract: The invention concerns modified hydrophobic polyelectrolytes by amide formation of a hydrophilic skeleton by n-alkylamines whereof the alkyl chain comprises 6 to 22 carbon atoms. Preferably, the amide formation is obtained by di-n-dodecylamine. The hydrophilic skeleton is preferably a sodium polyacrylate or polyacrylic acid corresponding to a statistical acrylate-AMPS copolymer. Said polymers can be used for stabilizing direct or invert emulsions likely to be destabilized or inverted by a modification in the degree of salinity of the aqueous phase or a pH modification. The invention is particularly useful for stabilizing oil drilling fluids or the like in particular drilling, fracturation, acidification or completion fluids.
    Type: Application
    Filed: July 13, 2007
    Publication date: January 17, 2008
    Inventors: Nathalie Monfreux-Gaillard, Patrick Perrin, Francoise LaFuma, Christopher Sawdon
  • Reversible emulsions stabilized by amphiphilic polymers and application to drilling fluid
    Patent number: 7262152
    Abstract: The invention concerns modified hydrophobic polyelectrolytes by amide formation of a hydrophilic skeleton by n-alkylamines whereof the alkyl chain comprises 6 to 22 carbon atoms. Preferably, the amide formation is obtained by di-n-dodecylamine. The hydrophilic skeleton is preferably a sodium polyacrylate or polyacrylic acid corresponding to a statistical acrylate-AMPS copolymer. Said polymers can be used for stabilizing direct or invert emulsions likely to be destabilized or inverted by a modification in the degree of salinity of the aqueous phase or a pH modification. The invention is particularly useful for stabilizing oil drilling fluids or the like in particular drilling, fracturation, acidification or completion fluids.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: August 28, 2007
    Assignee: M-I L.L.C.
    Inventors: Nathalie Monfreux-Gaillard, Patrick Perrin, Françoise LaFuma, Christopher Sawdon
  • Reversible emulsions stabilized by amphiphilic polymers and application to drilling fluid
    Publication number: 20040259739
    Abstract: The invention concerns modified hydrophobic polyelectrolytes by amide formation of a hydrophilic skeleton by n-alkylamines whereof the alkyl chain comprises 6 to 22 carbon atoms. Preferably, the amide formation is obtained by di-n-dodecylamine. The hydrophilic skeleton is preferably a sodium polyacrylate or polyacrylic acid corresponding to a statistical acrylate-AMPS copolymer. Said polymers can be used for stabilizing direct or invert emulsions likely to be destabilized or inverted by a modification in the degree of salinity of the aqueous phase or a pH modification. The invention is particularly useful for stabilizing oil drilling fluids or the like in particular drilling, fracturation, acidification or completion fluids.
    Type: Application
    Filed: July 16, 2004
    Publication date: December 23, 2004
    Inventors: Nathalie Monfreux-Gaillard, Patrick Perrin, Francoise LaFuma, Christopher Sawdon
  • Invertible emulsions stabitised by amphiphilic polymers and application to bore fluids
    Patent number: 6822039
    Abstract: The invention concerns modified hydrophobic polyelectrolytes by amide formation of a hydrophilic skeleton by n-alkylamines whereof the alkyl chain comprises 6 to 22 carbon atoms. Preferably, the amide formation is obtained by di-n-dodecylamine. The hydrophilic skeleton is preferably a sodium polyacrylate or polyacrylic acid corresponding to a statistical acrylate-AMPS copolymer. Said polymers can be used for stabilising direct or invert emulsions likely to be destabilised or inverted by a modification in the degree of salinity of the aqueous phase or a pH modification. The invention is particularly useful for stabilising oil drilling fluids or the like in particular drilling, fracturation, acidification or completion fluids.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: November 23, 2004
    Assignee: M-I L.L.C.
    Inventors: Nathalie Monfreux-Gaillard, Patrick Perrin, Françoise LaFuma