Perforators for wells of the oil type

摘要

The invention relates to a system for perforating the casing of a well by means of perforators and their firing system lowered with the production or test column 3. The system is characterised in that a hydraulic conduit 21 is fitted through the seal 2 making the part of the annulus 11 which is located above the said seal communicate with the firing system housed in that part of the annulus 12 which is below the said seal. The said firing system is positioned laterally outside the production or test column and fires the said perforators so as to leave a free passage after firing along the whole production or test column down to the bottom of the well. <IMAGE>