Schlumberger

Product Sheet: ASFS Addressable Switch Firing System

Date: 9/23/2014

Download: ASFS Addressable-Switch Firing System (0.32 MB PDF)

The ASFS addressable-switch firing system is run within explosive devices. The system is a series of microprocessors attached to the initiators. Digital communication is used to operationally check and arm the switches. Each microprocessor has a unique address to individually identify the associated explosive device. All circuits, gun wiring, and connections can be checked at surface with the Integrated Perforating Device Tester (IPDT); while running in hole, checking is done with the perforation acquisition system. Positive shot indication is achieved through the switch requerying feature. In the case of a misfire or failed pressure switch, that explosive device can be skipped over. For critical operations, backup devices can be run as a contingency.

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