Patents by Inventor Graham McElhinney

Graham McElhinney 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).

  • Location determination using vector measurements
    Patent number: 5675488
    Abstract: A method for locating underground cylindrically symmetrical magnetic sources, particularly boreholes, from magnetic field measurements. The method is based on the shape of magnetic field produced by magnetic materials with cylindrical axes. As the field caused by the magnetic source always points away from or towards its cylindrical axis, lines extended from magnetic field vectors caused by the magnetic source will always pass through the axis. Numerical techniques are used to find the common line to all the extended magnetic field vectors and thus calculate the axis of the magnetic source.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: October 7, 1997
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Graham McElhinney