Patents by Inventor David Ronald Bear

David Ronald Bear 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).

  • Determining electrical conductivity of a laminated earth formation using induction logging
    Patent number: 6147496
    Abstract: A method is provided for determining an electric conductivity of an earth formation formed of different earth layers, which earth formation is penetrated by a wellbore containing a wellbore fluid, is provided. The method includes the steps of: lowering an induction logging tool into the wellbore to a location surrounded by a selected one of the earth layers, the tool having a magnetic field transmitter effective to induce magnetic fields of different frequencies in the earth formation, and a magnetic field receiver effective to receive response magnetic fields and to provide a signal representative of each response magnetic field, at least one of the transmitter and the receiver having a plurality of magnetic dipole moments in mutually orthogonal directions.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: November 14, 2000
    Assignee: Shell Oil Company
    Inventors: Kurt-Martin Strack, Leonty Abraham Tabarovsky, David Ronald Bear, Melis van der Horst