Patents by Inventor Robert John Duenckel

Robert John Duenckel 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).

  • Proppants for gel clean-up
    Patent number: 7721804
    Abstract: Methods of incorporating a chemical breaker onto a proppant that will permit release of the breaker after the proppant has been placed in a hydraulic fracture are provided. The methods utilize a chemical breaker coated on the surface of a non-porous proppant grain or placed in the pore space of a porous proppant grain and secondarily coated with an outer layer which can be tailored to delay the release of the breaker.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: May 25, 2010
    Assignee: CARBO Ceramics Inc.
    Inventor: Robert John Duenckel
  • PROPPANTS FOR GEL CLEAN-UP
    Publication number: 20090008093
    Abstract: Methods of incorporating a chemical breaker onto a proppant that will permit release of the breaker after the proppant has been placed in a hydraulic fracture are provided. The methods utilize a chemical breaker coated on the surface of a non-porous proppant grain or placed in the pore space of a porous proppant grain and secondarily coated with an outer layer which can be tailored to delay the release of the breaker.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 8, 2009
    Applicant: CARBO CERAMICS INC.
    Inventor: Robert John Duenckel