Patents by Inventor Karl-Heinz Grodde

Karl-Heinz Grodde 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).

  • Method of reducing water production
    Patent number: 4579175
    Abstract: The disclosed invention reduces water production substantially more than hydrocarbon production in producing wells by the injection of an aqueous solution of alginates. The alginate solution or following solutions may optionally contain agents for decelerating or accelerating gelling of the alginate.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: April 1, 1986
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Karl-Heinz Grodde, Hartwig Volz
  • Process for the recovery of petroleum from subterranean formations
    Patent number: 4282930
    Abstract: An improved polymer flood process for the recovery of petroleum from a subterranean formation wherein a slug of a fresh water aqueous solution of a salt-insensitive polymer is injected into the formation prior to the undertaking of the polymer flood using a fresh water solution containing a partially hydrolyzed polyacrylamide.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: August 11, 1981
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Karl-Heinz Grodde, Hartwig Volz
  • Adapter for a sensitive viscometer
    Patent number: 4214475
    Abstract: An adapter for a sensitive viscometer. It provides increased drag at low shear rates to increase the accuracy. There is an inverted cup shaped rotor that cooperates with an annular shaped stationary container for the fluid to be measured. The annular shape of the container provides reaction surfaces with the fluid on both the inner and outer surfaces of the rotor. And, there is a reservoir in the stationary container with an overflow edge, so that the quantity of fluid to be measured is accurately metered.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: July 29, 1980
    Assignees: Texaco Inc., Deutsche Texaco Aktiengesellschaft
    Inventors: Walter H. Carter, Charles A. Christopher, Karl-Heinz Grodde
  • Aqueous drilling fluid
    Patent number: 4212794
    Abstract: This invention relates to an aqueous drilling fluid containing a tall oil fraction as a lubricating additive, a method of drilling with said drilling fluid containing said tall oil lubricating additive and the tall oil lubricating additive per se.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: July 15, 1980
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Karl-Heinz Grodde, Alfred Schulz
  • Aqueous drilling fluid
    Patent number: 4083790
    Abstract: This invention relates to an aqueous drilling fluid containing a tall oil fraction as a lubricating additive, a method of drilling with said drilling fluid containing said tall oil lubricating additive and the tall oil lubricating additive per se.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: April 11, 1978
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Karl-Heinz Grodde, Alfred Schulz
  • Gamma-ray measuring method for determining an interface between media
    Patent number: 3959647
    Abstract: The interface between two fluids such as oil and water in an underground cavern may be detected by placing a gelled substance containing a source of gamma radiation at the interface and detecting the emissions from the gelled substance.
    Type: Grant
    Filed: December 13, 1974
    Date of Patent: May 25, 1976
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventor: Karl-Heinz Grodde