Patents by Inventor E. G. Hoffman

E. G. Hoffman 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).

  • Electrical cable in reeled tubing
    Patent number: 5191173
    Abstract: An electrical cable assembly (10) comprising a cable core (12) and filler layer (16) encased in longitudinally welded reeled tubing (23) so as to restrict relative axial and longitudinal motion between the cable core (12) and reeled tubing (23). Small-diameter tubing (24) is optionally provided as part of the cable core (12) to facilitate the delivery of fluids such as lubricants and corrosion inhibitors to downhole equipment. A method is disclosed for deploying electrical cables in deep wells through use of the subject apparatus.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: March 2, 1993
    Assignee: Otis Engineering Corporation
    Inventors: Phillip S. Sizer, Malcolm N. Council, Willard J. Deese, E. G. Hoffman, Robert F. Bailey, David H. Neuroth