Patents by Inventor Kevin A. Eyl

Kevin A. Eyl 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 and apparatus for determining compressional first arrival times from waveform threshold crossing provided by apparatus disposed in a sonic well tool
    Patent number: 5058078
    Abstract: A well logging system includes a digital threshold crossing data generation system (TCDG System) disposed in a well tool, adapted to be disposed in a borehole, and a digital first motion detection (DFMD) software disposed in a memory of a well truck computer. The TCDG system generates a series of threshold crossings for each analog signal received from a receiver of the well tool, the threshold crossings including a plurality of threshold crossing events for each analog signal and representing compressed versions of digitized analog waveforms. The well logging truck computer receives the threshold crossing data from the TCDG system and executes the DFMD software. When the software is executed, a first set of compressional wave first arrival times are determined from a startup routine in the software using the threshold crossing data.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: October 15, 1991
    Assignee: Schlumberger Technology Corporation
    Inventors: Kevin A. Eyl, Andrew L. Kurkjian, David J. Lineman, Edward A. Pierce, Joseph M. Steiner, Jr.
  • Method and apparatus for determining compressional first arrival times from waveform threshold crossings provided by apparatus disposed in a sonic well tool
    Patent number: 4985873
    Abstract: A well logging system includes a digital threshold crossing data generation system (TCDG System) disposed in a well tool, adapted to be disposed in a borehole, and a digital first motion detection (DFMD) software disposed in a memory of a well truck computer. The TCDG system generates a series of threshold crossings for each analog signal received from a receiver of the well tool, the threshold crossings including a plurality of threshold crossing events for each analog signal and representing compressed versions of digitized analog waveforms. The well logging truck computer receives the threshold crossing data from the TCDG system and executes the DFMD software. When the software is executed, a first set of compressional wave first arrival times are determined from a startup routine in the software using the threshold crossing data.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: January 15, 1991
    Assignee: Schlumberger Technology Corporation
    Inventors: Kevin A. Eyl, Andrew L. Kurkjian, David J. Lineman, Edward A. Pierce, Joseph M. Steiner, Jr.