Patents by Inventor Avind D. Patel

Avind D. Patel 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).

  • Oil-based drilling fluid
    Patent number: 6218342
    Abstract: Invert emulsion compositions including an oleaginous, a non-oleaginous and an amine surfactant that are useful in the oil and gas well drilling art are disclosed. The amine surfactant is selected so that the invert emulsion can be converted form a water-in-oil type emulsion to a oil-in-water type emulsion upon the protonation of the amine surfactant. Deprotonation of the amine surfactant reverses the conversion.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: April 17, 2001
    Assignee: M-I LLC
    Inventor: Avind D. Patel
  • Invert emulsion fluids suitable for drilling
    Patent number: 5905061
    Abstract: New drilling fluids have been invented which are invert emulsion fluids comprising an oleaginous liquid, a non-oleaginous liquid, and a protonated amine. Such fluids are acidic and thus useful in drilling wells in which acidic gases such as CO.sub.2 or H.sub.2 S are likely to be encountered and break, i.e. de-emulsify, the drilling fluid.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: May 18, 1999
    Inventor: Avind D. Patel