Patents by Inventor Stanley T. Hewitt

Stanley T. Hewitt 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).

  • Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit)
    Patent number: 6850068
    Abstract: A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses an electrode for injecting current into the earth formation and an electrode for obtaining a responsive signal from the borehole. The electrodes are located on the drill bit arm or blade. Measured resistivity values are obtained at the location of the drill bit. Measurements can be taken in both oil-based mud and water-based mud environments. Maximum or minimum resistivity can be used to best represent the resistivity of the surrounding formation.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: February 1, 2005
    Assignee: Baker Hughes Incorporated
    Inventors: Roland E. Chemali, Paul Pastusek, Friedhelm Makohl, René N. Ritter, Martin Townley Evans, Stanley T. Hewitt
  • Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit)
    Publication number: 20040104726
    Abstract: A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses an electrode for injecting current into the earth formation and an electrode for obtaining a responsive signal from the borehole. The electrodes are located on the drill bit arm or blade. Measured resistivity values are obtained at the location of the drill bit. Measurements can be taken in both oil-based mud and water-based mud environments. Maximum or minimum resistivity can be used to best represent the resistivity of the surrounding formation.
    Type: Application
    Filed: June 16, 2003
    Publication date: June 3, 2004
    Applicant: Baker Hughes Incorporated
    Inventors: Roland E. Chemali, Paul Pastusek, Friedhelm Makohl, Rene N. Ritter, Martin Townley Evans, Stanley T. Hewitt