Patents by Inventor Kay T. Rankin

Kay T. Rankin 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).

  • Apparatus and method for vibrating a casing string during cementing
    Patent number: 5152342
    Abstract: A method of cementing a string of casing in a well utilizes a vibrating device downhole in the well. The vibrating device locates in the string of casing near the cement shoe. Cement slurry being pumped down the string of casing will flow through the device, out the shoe and return up the annulus. Some of the cement will flow through a bypass section of the device to power the device, causing vibrations in the casing.
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: October 6, 1992
    Inventors: R. Edward Rankin, Kay T. Rankin