SELECT FIRE SWITCH CONTROL SYSTEM AND METHOD

摘要

A select fire system and method for controlling operations in a gun string assembly comprising perforating guns and switch subs mechanically connected in the gun string assembly is disclosed. Each of the switch subs further comprises a switching element, input links and output links. The switch subs and perforating guns communicate with each other through the input and output links. The switching elements keeps track of the state of the sub and switches states based on trigger conditions such as environment conditions, perforating gun conditions, or input conditions from surface. A self-detecting method for detecting failures in a perforating gun and acting on the failure without the need for pulling the gun string assembly out of the wellbore is also disclosed.

主权项

1. A select fire system for controlling operations in a gun string assembly, said system comprising a plurality of perforating guns and a plurality of switch subs mechanically connected in said gun string assembly; each of said plurality of switch subs further comprising:
(a) switching element; (b) plurality of input links; and (c) plurality of output links; wherein said switching element further comprising environmental sensing ports configured to sense well conditions, perforating gun conditions, and input conditions from surface; said plurality of input links are configured for operative electrical connections to at least one of said plurality of perforating guns, at least one of said plurality of switch subs; and said plurality of output links are configured for operative electrical connections to at least one of said plurality of perforating guns, at least one of said plurality of switch subs.