Patents by Inventor Danhua Leslie Zhang

Danhua Leslie Zhang 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).

  • Methods for increasing gas production from a subterranean formation
    Patent number: 8302691
    Abstract: Exemplary embodiments provide methods of treating a subterranean formation to improve gas production therefrom. Exemplary embodiments of the methods comprise introducing a cationic polyorganosiloxane into the subterranean formation, wherein the cationic polyorganosiloxane comprises at least two quaternary ammonium groups.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: November 6, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Larry S. Eoff, Danhua Leslie Zhang, Eldon D. Dalrymple, Paul S. Brown
  • Compositions for increasing gas production from a subterranean formation
    Patent number: 8053395
    Abstract: Exemplary embodiments provide treatment fluids for treating a subterranean formation to improve gas production therefrom. Exemplary embodiments of the treatment fluids comprise a base fluid and a cationic polyorganosiloxane, wherein the cationic polyorganosiloxane comprises at least two cationic quaternary ammonium groups.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: November 8, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Larry S. Eoff, Danhua Leslie Zhang, Eldon D. Dalrymple, Paul S. Brown
  • Methods for increasing gas production from a subterranean formation
    Publication number: 20080173451
    Abstract: Exemplary embodiments provide methods of treating a subterranean formation to improve gas production therefrom. Exemplary embodiments of the methods comprise introducing a cationic polyorganosiloxane into the subterranean formation, wherein the cationic polyorganosiloxane comprises at least two quaternary ammonium groups.
    Type: Application
    Filed: January 19, 2007
    Publication date: July 24, 2008
    Inventors: B. Raghava Reddy, Larry S. Eoff, Danhua Leslie Zhang, Eldon D. Dalrymple, Paul S. Brown
  • Compositions for increasing gas production from a subterranean formation
    Publication number: 20080176771
    Abstract: Exemplary embodiments provide treatment fluids for treating a subterranean formation to improve gas production therefrom. Exemplary embodiments of the treatment fluids comprise a base fluid and a cationic polyorganosiloxane, wherein the cationic polyorganosiloxane comprises at least two cationic quaternary ammonium groups.
    Type: Application
    Filed: January 19, 2007
    Publication date: July 24, 2008
    Inventors: B. Raghava Reddy, Larry S. Eoff, Danhua Leslie Zhang, Eldon D. Dalrymple, Paul S. Brown