Patents by Inventor Kenneth Lawrence Craft

Kenneth Lawrence Craft 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).

  • Calibration of geophone and hydrophone pairs
    Patent number: 11442197
    Abstract: A system to improve calibration of geophone and hydrophone pairs is described. The system generates first and second phase shifted data by applying a first and second phase shift to first seismic data acquired by the geophone. The system generates a first upgoing wavefield by summing the first phase shifted data and second seismic data acquired by the hydrophone, and a second upgoing wavefield by summing the second phase shifted data and the second seismic data. The system generates a first downgoing wavefield from a difference of the first phase shifted data and the second seismic data, and a second downgoing wavefield from a difference of the second phase shifted data and the second seismic data. The system determines ratios of the upgoing wavefields and the downgoing wavefields for each phase shift to identify the highest ratio, and selects the phase shift corresponding to the highest ratio for calibration.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: September 13, 2022
    Assignee: Fairfield Industries Incorporated
    Inventors: Kenneth Lawrence Craft, Carsten Udengaard
  • CALIBRATION OF GEOPHONE AND HYDROPHONE PAIRS
    Publication number: 20190250306
    Abstract: A system to improve calibration of geophone and hydrophone pairs is described. The system generates first and second phase shifted data by applying a first and second phase shift to first seismic data acquired by the geophone. The system generates a first upgoing wavefield by summing the first phase shifted data and second seismic data acquired by the hydrophone, and a second upgoing wavefield by summing the second phase shifted data and the second seismic data. The system generates a first downgoing wavefield from a difference of the first phase shifted data and the second seismic data, and a second downgoing wavefield from a difference of the second phase shifted data and the second seismic data. The system determines ratios of the upgoing wavefields and the downgoing wavefields for each phase shift to identify the highest ratio, and selects the phase shift corresponding to the highest ratio for calibration.
    Type: Application
    Filed: April 24, 2019
    Publication date: August 15, 2019
    Inventors: Kenneth Lawrence Craft, Carsten Udengaard
  • Calibration of geophone and hydrophone pairs
    Patent number: 10310133
    Abstract: A system to improve calibration of geophone and hydrophone pairs is described. The system generates first and second phase shifted data by applying a first and second phase shift to first seismic data acquired by the geophone. The system generates a first upgoing wavefield by summing the first phase shifted data and second seismic data acquired by the hydrophone, and a second upgoing wavefield by summing the second phase shifted data and the second seismic data. The system generates a first downgoing wavefield from a difference of the first phase shifted data and the second seismic data, and a second downgoing wavefield from a difference of the second phase shifted data and the second seismic data. The system determines ratios of the upgoing wavefields and the downgoing wavefields for each phase shift to identify the highest ratio, and selects the phase shift corresponding to the highest ratio for calibration.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: June 4, 2019
    Assignee: Fairfield Geotechnologies
    Inventors: Kenneth Lawrence Craft, Carsten Udengaard
  • CALIBRATION OF GEOPHONE AND HYDROPHONE PAIRS
    Publication number: 20180095189
    Abstract: A system to improve calibration of geophone and hydrophone pairs is described. The system generates first and second phase shifted data by applying a first and second phase shift to first seismic data acquired by the geophone. The system generates a first upgoing wavefield by summing the first phase shifted data and second seismic data acquired by the hydrophone, and a second upgoing wavefield by summing the second phase shifted data and the second seismic data. The system generates a first downgoing wavefield from a difference of the first phase shifted data and the second seismic data, and a second downgoing wavefield from a difference of the second phase shifted data and the second seismic data. The system determines ratios of the upgoing wavefields and the downgoing wavefields for each phase shift to identify the highest ratio, and selects the phase shift corresponding to the highest ratio for calibration.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 5, 2018
    Inventors: Kenneth Lawrence Craft, Carsten Udengaard