Patents Assigned to Tendex Kjemiservice A/S
  • Acidizing method using microemulsion
    Patent number: 4650000
    Abstract: Formations surrounding oil wells, gas wells, injection wells and similar bore holes are treated by the injection of a microemulsion containing an acid solution. The main surfactant of the microemulsion is characterized by having at least two hydrocarbon groups attached to a nitrogen atom via a polar groups.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: March 17, 1987
    Assignees: Berol Kemi AB, Tendex Kjemiservice A/S
    Inventors: Eva M. Andreasson, Finn Egeli, Krister A. Holmberg, Borje Nystrom, Kjell G. Stridh, Eva M. sterberg