Abstract: A device adapted for a down-hole seismic source in a down-hole in the subsoil and containing water, the device being adapted for introduction into the down-hole and immersion in water, includes: a cartridge-holding head, having a cavity having a number of firing mouths on the side surface of the head, inclined relative to the longitudinal axis of the head towards the operationally lower end of the closed head, the cavity accommodating a cartridge inserted into the upper end of the head; a cartridge percussion system into a sealed body and adapted to cause the explosion of the cartridge, and connected in a top position of the head, the explosion of the cartridge, of the blank-loaded type, causing water to be expelled laterally through the firing mouths when the device is operationally immersed in water within the down-hole.

Abstract: A device adapted for a down-hole seismic source, the down-hole being obtained in the subsoil and containing water, the device being adapted for introduction into the down-hole and immersion in water, includes: a cartridge-holding head (22), having a cavity (51) ending into a number of external apertures (24) that constitute firing mouths arranged on the side surface of the head, inclined relative to the longitudinal axis of the head towards the operationally lower end of the head, the end of the head being closed, the cavity being so shaped as to accommodate a cartridge, which can be inserted into the operationally upper end of the head; a cartridge percussion system, inserted into a sealed body (21) and adapted to cause the explosion of the cartridge, and connected to the head in a position operationally on top of the latter, the explosion of the cartridge, which is of the blank-loaded type, causing water to be expelled laterally through the external apertures when the device is operationally immersed in wat