Patents by Inventor Kieu T. Ly

Kieu T. Ly 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).

  • Method for removing deposits comprising heavy hydrocarbonaceous materials and finely divided inorganic materials from a flow line using a surfactant composition
    Patent number: 6234183
    Abstract: A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: May 22, 2001
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly
  • Surfactant composition for cleaning wellbore and oil field surfaces using the surfactant composition
    Patent number: 6130199
    Abstract: A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: October 10, 2000
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly
  • Method for cleaning wellbore surfaces using coiled tubing with a surfactant composition
    Patent number: 6112814
    Abstract: A method for cleaning a wellbore plugged with deposits of heavy hydrocarbons and finely-divided inorganic solids by circulating a surfactant composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol through the wellbore with a coiled tubing.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: September 5, 2000
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly
  • Surfactant blends for well operation
    Patent number: 6090754
    Abstract: Surfactant compositions for wellbore operations consisting essentially of a first surfactant selected from the group consisting of alkyl polyglycosides containing alkyl groups containing an odd number of carbon atoms from about 9 to about 13 carbon atoms and a second surfactant selected from the group consisting of alkyl polyglycosides containing alkyl groups containing from about 12 to about 18 carbon atoms and a third surfactant selected from the group consisting of linear ethoxylated alcohols containing from about 8 to 12 carbon atoms and from about 2 to about 8 ethylene oxide groups and a method for formulating such surfactant compositions.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: July 18, 2000
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, Kieu T. Ly
  • Method for cleaning deposits from a tank using a surfactant composition
    Patent number: 6000412
    Abstract: A method for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from a tank using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: December 14, 1999
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly, William G. McLelland
  • Surfactant composition and method for cleaning wellbore and oil field surfaces using the surfactant composition
    Patent number: 5996692
    Abstract: A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: December 7, 1999
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly
  • Method for cleaning drilling fluid solids from a wellbore using a surfactant composition
    Patent number: 5874386
    Abstract: A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol by injecting the composition into the wellbore, maintaining the composition in the wellbore for a selected time and thereafter producing the composition from the wellbore.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: February 23, 1999
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, William Mark Bohon, David J. Blumer, Kieu T. Ly
  • Surfactant blends for well operations
    Patent number: 5830831
    Abstract: Blends of alkyl polyglycoside surfactants having an alkyl chain length of C11 to C16 and blends of alkyl polyglycoside surfactants, in the presence of an ethoxylated alcohol cosurfactant, will form Winsor type III microemulsions in a water-oil mixture in a hydrophile-lipophile balance range of at least about 9.8 to 10.8 at 130.degree. F. wherein the water may be a chloride brine. The compositions are particularly useful in oil and gas well cleanout operations, formation acidizing, and well cementing operations and provide superior cleaning ability for removal of oil based drilling fluids, hydrocarbons and oil based pipe sealant and lubricant compositions, for example.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: November 3, 1998
    Assignee: Atlantic Richfield Company
    Inventors: Albert F. Chan, Kieu T. Ly