Patents by Inventor Roger S. Cronwell

Roger S. Cronwell 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, cement compositions and suspending agents therefor
    Patent number: 7114569
    Abstract: The present invention includes methods of cementing, cement compositions and a suspending agent comprising boron treated low molecular weight dry ground guar splits. A cement composition of the invention comprises hydraulic cement, water and a boron treated low molecular weight dry ground guar splits suspending agent. A method of cementing comprising the steps of preparing a cement composition that comprises hydraulic cement, water and a suspending agent comprising boron treated low molecular weight dry ground guar splits; placing the cement composition in a location to be cemented; and allowing the cement composition to set.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: October 3, 2006
    Assignee: Halliburton Energy Service,s Inc.
    Inventors: Jiten Chatterji, Roger S. Cronwell, D. Chad Brenneis, Bobby J. King
  • Foamed cement slurries, additives and methods
    Patent number: 7008477
    Abstract: The present invention relates to foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and an environmentally benign foaming and stabilizing additive comprising a mixture of an ammonium salt of an alkyl ether sulfate surfactant, a cocoamidopropyl hydroxysultaine surfactant, a cocoamidopropyl dimethylamine oxide surfactant, sodium chloride and water.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: March 7, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Bobby J. King, Roger S. Cronwell, D. Chad Brenneis, Dennis W. Gray
  • Foamed cement slurries, additives and methods
    Patent number: 6951249
    Abstract: The present invention relates to foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and an environmentally benign foaming and stabilizing additive comprising a mixture of an ammonium salt of an alkyl ether sulfate surfactant, a cocoamidopropyl hydroxysultaine surfactant, a cocoamidopropyl dimethylamine oxide surfactant, sodium chloride and water.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: October 4, 2005
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Bobby J. King, Roger S. Cronwell, D. Chad Brenneis, Dennis W. Gray