Patents by Inventor Leo B. Maekiaho

Leo B. Maekiaho 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).

  • Method for determining the azimuth of a borehole
    Patent number: 4682421
    Abstract: A method for eliminating the influence of drill string magnetization on an azimuth measurement made by a magnetometer package disposed in the drill string. The method comprises first eliminating the influence of the cross-axial components of the drill string magnetization by taking magnetometer readings at various angular orientations of the drill string and then eliminating the influence of the axial component of the drill string magnetization.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: July 28, 1987
    Assignee: Shell Oil Company
    Inventors: Johannes C. M. van Dongen, Leo B. Maekiaho