Patents by Inventor Allen R. Toney

Allen R. Toney 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).

  • Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone
    Patent number: 6815399
    Abstract: A plugging fluid for plugging a subterranean formation zone surrounding a drill hole consisting of an emulsion comprising an oil phase containing an oil, an emulsifier and 2.4 to 4 kg of cement per liter of oil and an aqueous phase containing water and 12-16 g of polysaccharide per liter of water, wherein the oil to water volume ratio ranges from 20:80 to 25:75. Upon shearing, the emulsion inverts so that the rupture of the emulsion droplets releases the cement into the water phase thus providing metallic divalent ion to crosslink with the polysaccharide and forming a gel structure.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: November 9, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Les Johnson, Kamal Arsanious, David Quinn, Patrick Murphy, Allen R. Toney