Patents Assigned to Getty Oil Company, Inc.
  • Method of thermally insulating a wellbore
    Patent number: 4276936
    Abstract: A method of thermally insulating the borehole of a well in a thermal process for oil recovery by providing in the annular space between the casing and the well tubing a flowable, solid material having thermal insulating properties, such as vermiculite or perlite. Removal of the material is by fluidization thereof.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: July 7, 1981
    Assignee: Getty Oil Company, Inc.
    Inventor: Howard L. McKinzie