Patents Assigned to Oil Base, Inc.
  • Method for repairing sewer pipes
    Patent number: 4170248
    Abstract: A sewer pipe is repaired by inserting a thin, flexible liner within the sewer pipe. The liner has an outer diameter less than the inner diameter of the sewer pipe, whereby an annular space is presented between the liner and the sewer pipe. This annular space is filled with a low viscosity magnesium based cement, such as magnesium oxychloride cement or magnesium oxysulfate cement, which has a maximum Marsh funnel viscosity of 40 seconds per quart.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: October 9, 1979
    Assignee: Oil Base, Inc.
    Inventors: Robert B. Bennett, Warren C. McMordie, Jr., William H. Taylor
  • Noncorroding water base drilling fluids and additive system for making
    Patent number: 3956142
    Abstract: Water base drilling fluids having superior stability characteristics and having an improved noncorroding nature utilize an additive system comprising an alkali metal lignin, lignite, quebracho, and a water soluble chromium (VI) salt capable of introducing chromate ions into the alkaline water base mud system. An additive system having these four respective ingredients in a weight proportion of about 4:2:1:1 is admixed with a clay-water mixture to formulate the drilling fluid.
    Type: Grant
    Filed: October 16, 1972
    Date of Patent: May 11, 1976
    Assignee: Oil Base, Inc.
    Inventors: Doyne L. Wilson, Warren C. McMordie, Jr., Albert H. D. Alexander