| 摘要 |
<p>A device is described which is adapted for a down-hole seismic source, said down-hole being obtained in the subsoil and containing water, the device being adapted for introduction into said down-hole and immersion in water, comprising: - a cartridge-holding head (22), comprising 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, said end of the head being closed, said 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 said 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 said external apertures when the device is operationally immersed in water within said down-hole.</p> |
