Portable seismic survey apparatus with an implodable device

Claim 1

IN AN APPARATUS FOR GEOPHYSICAL EXPLORATION IN WHICH ELASTIC WAVE INITIATING APPARATUS IS DISPOSED AT LEAST NEAR TO THE SURFACE OF THE EARTH IN A WALLED SHOT HOLE EXTENDING INTO THE EARTH AND DETECTORS ARE DISPOSED AT OR NEAR THE EARTH''S SURFACE AND SPACED FROM SAID INITIATING APPARATUS, SAID SPACED DETECTORS AND A DETECTOR DISPOSED CLOSELY ADJACENT TO SAID INITIATING APPARATUS BEING COUPLED TO A SUITABLE RECORDER FOR INDICATING ON A TIME BASE ANY SIGNALS DETECTED, THE IMPROVEMENT WHEREIN SAID ELASTIC WAVE INTIATING APPARATUS COMPRISES A PORTABLE ENCLOSURE WALLED CONTAINER HAVING AN IMPLODABLE PART OF PREDETERMINED VOLUME THEREIN, SAID WALLED CONTAINER BEING ADAPTED TO BE MOVED FROM ONE SHOT HOLE TO ANOTHER, MEANS FOR AT LEAST PARTIALLY FILLING THE INTERIOR OF SAID CONTAINER WITH LIQUID AND FOR INTERNALLY PRESSURIZING SAID CONTAINER, WHEREBY IMPLOSION OF SAID IMPLODABLE PART OCCURS, AND MEANS HAVING A LIQUID BASE FOR COUPLING SAID CONTAINER TO THE EARTH.