Patents by Inventor Steven D. Maddox

Steven D. Maddox 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 to transmit downhole video up standard wireline cable using digital data compression techniques
    Patent number: 6229453
    Abstract: Disclosed is a downhole video system that is suitable for use with a standard wireline transmission line, without the need for coaxial or fiber optic cable. A downhole video camera transmits a digitized video signal that may be multiplexed with orientation, sound, and other telemetry data. At the surface, an enhanced video is displayed simultaneously with processed sound to give an operator a better understanding of the conditions downhole. In addition, multiple modes are provided, including a “burst” mode to provide high resolution, full motion video, thereby circumventing the severe bandwidth limitations of standard electrical transmission lines.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: May 8, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Wallace R. Gardner, Steven D. Maddox