Patents by Inventor Greig Fraser

Greig Fraser 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).

  • Polymer Crosslinking System Comprising Soluble Zr(IV), Carbonate and Bicarbonate Ions
    Patent number: 7345013
    Abstract: A composition useful for making gelled fluids by crosslinking hydratable polymers is an aqueous solution of zirconium complexed with carbonate and bicarbonate as the only multidentate ligands complexed with zirconium. The composition also provides pH modifying capability and the crosslinking is delayed, so that the single composition replaces several liquid additives previously necessary for generation of fluids used, for example, in hydraulic fracturing.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: March 18, 2008
    Assignee: Schlumberger Technology Corporation
    Inventor: Greig Fraser
  • Polymer crosslinking system
    Publication number: 20060189709
    Abstract: A composition useful for making gelled fluids by crosslinking hydratable polymers is an aqueous solution of zirconium complexed with carbonate and bicarbonate as the only multidentate ligands complexed with zirconium. The composition also provides pH modifying capability and the crosslinking is delayed, so that the single composition replaces several liquid additives previously necessary for generation of fluids used, for example, in hydraulic fracturing.
    Type: Application
    Filed: February 23, 2005
    Publication date: August 24, 2006
    Inventor: Greig Fraser