Patents by Inventor John E. Finnegan

John E. Finnegan 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).

  • Drill pipe with helical ridge for drilling highly angulated wells
    Patent number: 5042600
    Abstract: The drilling of highly angulated wellbores (with a rotary rig having a drill string terminated with a bit wherein drilling fluid is employed) is improved by employing in the highly angulated drill string a length of drill pipe which has a helical ridge disposed thereabout such that the flight of the helical ridge is wound so as to rise from the bit with the rotation of the drill string and the height of the helical ridge above the length of the surface of the drill pipe is 1 to 15 percent of the diameter of the drill pipe.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: August 27, 1991
    Assignee: Conoco Inc.
    Inventors: John E. Finnegan, Jerry G. Williams