Patents by Inventor Steven R. Blattel

Steven R. Blattel 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).

  • Invert well service fluid and method
    Patent number: 6562764
    Abstract: A well service fluid and method using same for brine-sensitive formations is disclosed. The fluid is an invert oil emulsion comprising heavy, solids-free brine, an oil or synthetic, and sufficient emulsifier to create the emulsion. The fluid has particular applicability in gravel packing a horizontal well.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: May 13, 2003
    Inventors: R. Ashley Donaldson, Steven R. Blattel, Michael H. Hoff
  • Aqueous drilling and packer fluids
    Patent number: 4341645
    Abstract: Aqueous, clay-containing drilling fluids and packer fluids are modified for reduction of viscosity and gel strength upon addition of water soluble lignosulfonates and particular low molecular weight acrylic copolymers. Enhanced reduction of viscosity and gel strength may be obtained by also adding an ethoxylated phenol surfactant.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: July 27, 1982
    Assignee: NL Industries, Inc.
    Inventors: Steven R. Blattel, Larry W. Hilscher