Patents Assigned to Chemplex, Ltd.
  • Viscosity breaker for polyacrylamide friction reducers
    Patent number: 7621335
    Abstract: A well treating fluid useful in slickwater fracturing processes contains polyacrylamide friction reducer and a viscosity breaker capable of reducing the viscosity of the well treating fluid to about the viscosity of water at ambient temperatures of typical underground formations. The viscosity breaker is selected from the group consisting of hydrogen peroxide, calcium peroxide, magnesium peroxide, and zinc peroxide and is present in an amount above about 0.002% by weight.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: November 24, 2009
    Assignee: Chemplex, Ltd.
    Inventors: Oscar L. Valeriano, Richard J. Dyer