Patents by Inventor Waverly A. Duggar

Waverly A. Duggar 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).

  • Polyphenylene sulfide proppants
    Patent number: 7568524
    Abstract: A system and method for delivering a slurry having a fracturing fluid and one or more proppants to a fracture in a subterranean formation. At least one proppant has PPS and produces less than 5 weight percent fines at a closure pressure of the fractured subterranean formation as determined by API RP 60. The one or more proppants are deposited into the fracture to prop the fracture.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: August 4, 2009
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jay Glenn Blackburn, Waverly A. Duggar
  • Polyphenylene Sulfide Proppants
    Publication number: 20080217010
    Abstract: Embodiments of the present invention relate to delivering a slurry having a fracturing fluid and one or more proppants to a fracture in a subterranean formation. At least one proppant has PPS and produces less than 5 weight percent fines at a closure pressure of the fractured subterranean formation as determined by API RP 60. The one or more proppants are deposited into the fracture to prop the fracture.
    Type: Application
    Filed: February 15, 2008
    Publication date: September 11, 2008
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY, LP
    Inventors: Jay Glenn Blackburn, Waverly A. Duggar