Patents by Inventor David J. Buchanan

David J. Buchanan 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).

  • Mapping faults in a geological seam
    Patent number: 4653031
    Abstract: An area of a seam is defined and a series of shot locations and detectors are arranged along one side of the area to determine reflected signals. Transmitted signals are also received from a line of shot locations on the other side of the area. The signals received are processed according to an adaptive lag-summing technique to give a map showing the geological faults in the seam.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: March 24, 1987
    Assignee: Coal Industry (Patents) Limited
    Inventors: David J. Buchanan, Richard Davis, Peter J. Jackson, Iain M. Mason
  • Method of stacking seismic data
    Patent number: 4393484
    Abstract: Faults in a mineral seam are located by an in-seam seismic technique which involves locating shots and detectors in the seam and firing the shots sequentially. The detectors pick up the reflections of the shots from faults and a common reflection point is determined by analyzing the seismic traces from the detectors.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: July 12, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventors: David J. Buchanan, Richard Davis, Peter J. Jackson
  • Method of and apparatus for locating disturbances in a mineral seam
    Patent number: 4351035
    Abstract: Faults in an underground coal seam are located by firing a shot at one point in the seam and detecting the seismic reflections in an array of geophones. Signals from the geophones are recompressed and analyzed according to an exponential formula to give a holograph of the seam and to predict the fault pattern.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: September 21, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: David J. Buchanan, Iain M. Mason