Patents by Inventor Matt Graham

Matt Graham 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).

  • Viscoelastic surfactant acid treatment
    Patent number: 8895481
    Abstract: A method of treating a subterranean formation penetrated by a wellbore involves introducing an acid treatment fluid through the wellbore into the formation. The treatment fluid is formed from a zwitterionic viscoelastic surfactant, an acid in an amount to provide the treatment fluid with an initial pH of ?0 and a rheology enhancer. The treatment fluid has a high viscosity at the initial pH and a lower viscosity when the pH of the treatment fluid is raised to an intermediate pH of from greater than 0 to about 5.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: November 25, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Yiyan Chen, Abbas Mahdi, Richard Marcinew, Matt Graham, Timothy L. Pope
  • VISCOELASTIC SURFACTANT ACID TREATMENT
    Publication number: 20110152135
    Abstract: A method of treating a subterranean formation penetrated by a wellbore involves introducing an acid treatment fluid through the wellbore into the formation. The treatment fluid is formed from a zwitterionic viscoelastic surfactant, an acid in an amount to provide the treatment fluid with an initial pH of ?0 and a rheology enhancer. The treatment fluid has a high viscosity at the initial pH and a lower viscosity when the pH of the treatment fluid is raised to an intermediate pH of from greater than 0 to about 5.
    Type: Application
    Filed: December 21, 2009
    Publication date: June 23, 2011
    Inventors: Yiyan Chen, Abbas Mahdi, Richard Marcinew, Matt Graham, Timothy L. Pope