Patents Assigned to Marathon Oil Co.
  • Use of potassium hydroxide solutions in a well bore
    Patent number: 4284140
    Abstract: A workover fluid, a kill fluid, or completion fluid having potassium hydroxide dissolved therein is injected into a well bore penetrating and communicating with a subterranean sandstone formation containing water-sensitive fine particles, including clays, and invades the sandstone formation. Potassium hydroxide contacts and stabilizes the fine particles for a substantial period of time thereby substantially preventing formation permeability damage caused by encroachment of aqueous solutions having a distinct and undesired ionic constituency.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: August 18, 1981
    Assignee: Marathon Oil Co.
    Inventors: Robert D. Sydansk, Frank S. Cordiner