A MULTISHOT DOWNHOLE EXPLOSIVE DEVICE AS A SEISMIC SOURCE.

摘要

A DOWNHOLE SEISMIC ACOUSTICAL SIGNAL SOURCE CAPABLE OF SELECTIVELY FIRING NUMEROUS, PREWIRED EXPLOSIVE CHARGES. THE DOWNHOLE SEISMIC SOURCE USES A SELF-CONTAINED FIRING CIRCUIT THAT IS CAPABLE OF RECEIVING SELECT AND FIRE SIGNALS FROM A SEISMIC CREW AT THE GROUND SURFACE THROUGH A STANDARD SEVEN CONDUCTOR WIRELINE CABLE TO DETONATE THE EXPLOSIVE CHARGES. THE DOWNHOLE SEISMIC SOURCE IS CAPABLE OF GENERATING NUMEROUS SIGNALS IN A GIVEN DOWNHOLE TRIP THROUGH THE FIRING OF MANY INDIVIDUAL EXPLOSIVE CHARGES.(FIG 1)