Patents by Inventor Jack Philip Chance

Jack Philip Chance 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).

  • Patent number: 5979570
    Abstract: A tool for controlling azimuth and/or inclination in a wellbore and methods for utilizing the same is disclosed. The tool generally comprises a freely rotating mandrel, for transmitting drilling forces, contained within two eccentric sleeves. The outer sleeve has an eccentric longitudinal bore that forms a pregnant or weighted side that seeks the low-side of the wellbore. Two gauge inserts or stabilizer shoes are provided on either side of the outer sleeve at ninety degrees to the pregnant housing. The inner sleeve has a further eccentric longitudinal bore that contains the freely rotating mandrel. The mandrel is attached to the drill string at one end and to the drilling bit at the other. The position of the inner sleeve may be controlled, at will from the surface, so that the eccentric is kept to one side of the outer housing, thus transmitting a fulcrum force to the bit and controlling the azimuth and/or inclination of the wellbore.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: November 9, 1999
    Inventors: Stephen John McLoughlin, Jack Philip Chance