NEHRP Clearinghouse

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• Katz, L. J.
  Feasibility Study for a Seismic Drill Bit Location and Guidance System.
  National Science Foundation, Washington, DC. Engineering and Applied Science., January 1980, 24 p.
  Keywords: ; Rotary drill bits; Seismic detection; Directional drilling; Rotary drilling; Seismic arrays; Azimuth indicators; Position finding