| 主权项 |
1. A perforating tool, comprising:
a perforating gun having at least one shaped charge, the at least one shaped charge generating a high-pressure gas when detonated; a valve sub connected to the perforating gun, the valve sub having:
an enclosure having at least one port providing fluid communication between an exterior and an interior of the valve sub,a mandrel disposed in the enclosure, the mandrel having a piston head and a fluid path extending at least partially through the mandrel,a sleeve slidably mounted on the mandrel, the sleeve selectively blocking fluid flow through the at least one port, anda pressure chamber defined by an inner surface of the sleeve and an outer surface of the piston head, the pressure chamber receiving the generated high-pressure gas via the fluid path, wherein the sleeve slides toward the perforating gun after a predetermined pressure is created by the generated high-pressure gas in the pressure chamber; and a reservoir sub coupled to the valve sub, the reservoir sub having at least one chamber in fluid communication with the interior of the valve sub. |
