Patents by Inventor Everett H. Lock

Everett H. Lock 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 for establishing and maintaining electric continuity in drill pipe
    Patent number: 4051456
    Abstract: Apparatus for use in a rotary drill string to maintain electric continuity therethrough includes an externally insulated electric conductor tube having an electric cable mounted therein. The cable is telescopically movable with respect to the tube, and its lower end is in sliding contact with the interior of the tube. As drilling progresses, the cable may be extended relative to the tube, the sliding contact of the lower end of the cable maintaining electric continuity in the system.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: September 27, 1977
    Assignee: Exxon Production Research Company
    Inventors: Joe K. Heilhecker, Everett H. Lock, Fred H. Deily