Patents by Inventor Phillip D. Pattillo

Phillip D. Pattillo 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 applying tensile stress to a casing
    Patent number: 4376463
    Abstract: This is a method of cementing casing under tension. Internal pressure is applied to a casing string set in the borehole after cement has been placed between the casing and the borehole wall. This results in a lengthening of the string. Anchor means are next set in the well wall and pressure released prior to setting of the cement to leave the string with an additional tensile loading.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: March 15, 1983
    Assignee: Standard Oil Company (Indiana)
    Inventors: Phillip D. Pattillo, William H. Wadlington