Patents by Inventor Norbert Kholer

Norbert Kholer 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).

  • Process for preventing water inflow in an oil- and/or gas-producing well
    Patent number: 4718491
    Abstract: The invention relates to a process for reducing or completely stopping a water inflow from a formation towards a producing well.The process according to the invention, using the injection of an aqueous dispersion of hydrosoluble polysaccharide in this producing well, blocks the water inflow without however decreasing the oil and gas flow towards this well.This process is particularly of high interest when the produced water is hot, e.g. at a temperature from 70.degree. to 130.degree. C., and/or salted, e.g. of a salt content of at least 30 g/l.This process is used for oil and/or gas production.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: January 12, 1988
    Assignee: Institut Francais du Petrole
    Inventors: Norbert Kholer, Rene Tabary, Alain Zaitoun