Patents by Inventor Joseph J. Clemens

Joseph J. Clemens 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).

  • Use of scale inhibitors in hydraulic fracture fluids to prevent scale build-up
    Patent number: 5224543
    Abstract: Scale inhibitor is added to a cross-linked fracturing fluid as an integral part of the fracturing fluid. Preferred fracturing fluids are borate cross-linked and the preferred scale inhibitor is polyacrylate. In another embodiment of this invention, the fracturing fluid is prepared by adding a scale inhibitor to a fracturing fluid at a pH of between 8.5 and 10.5. In a third embodiment, the fracturing fluid prepared above is used to fracture subterranean formations. In a fourth embodiment, the fracturing fluid is used to pressurize a subterranean formation to break scale near the hydrocarbon wellbore.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: July 6, 1993
    Assignee: Union Oil Company of California
    Inventors: David R. Watkins, Joseph J. Clemens, John C. Smith, Surinder N. Sharma, Hetty G. Edwards