Patents by Inventor Hugh Caffery

Hugh Caffery 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).

  • Process for coating gravel pack sand with polymeric breaker
    Patent number: 7972997
    Abstract: A process for making a coated substrate that includes treating a proppant with a coating agent, wherein the coating agent comprises at least one of monomeric alpha-hydroxycarboxylic acids, alpha-hydroxycarboxylic acid polymers, and combinations thereof, reacting the treated proppant to form a polymer coated proppant, and recovering the polymer coated proppant is disclosed.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: July 5, 2011
    Assignee: M-I L.L.C.
    Inventors: Charles Svoboda, Hugh Caffery, Li-Jein Lee
  • PROCESS FOR COATING GRAVEL PACK SAND WITH POLYMERIC BREAKER
    Publication number: 20070054054
    Abstract: A process for making a coated substrate that includes treating a proppant with a coating agent, wherein the coating agent comprises at least one of monomeric alpha-hydroxycarboxylic acids, alpha-hydroxycarboxylic acid polymers, and combinations thereof, reacting the treated proppant to form a polymer coated proppant, and recovering the polymer coated proppant is disclosed.
    Type: Application
    Filed: June 14, 2006
    Publication date: March 8, 2007
    Applicant: M-I L.L.C.
    Inventors: Charles Svoboda, Hugh Caffery, Li-Jein Lee