Patents Assigned to Hydroacustics, Inc.
  • Seismic wave generation by a downhole source
    Patent number: 4722417
    Abstract: A method and apparatus for downhole source generation of seismic waves of adjustable frequency by isolating a volume of liquid in a bore hole and cyclically varying the volume by a hydraulically operated transforming piston which varies the pressure of the volume thereby displacing the surrounding strata to generate waves.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: February 2, 1988
    Assignee: Hydroacustics, Inc.
    Inventor: Roger L. Selsam