E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/13
E21B 43/116 (2006.01)
Patent
CA 1060780
SELECTIVE FIRING SYSTEM Abstract of the Disclosure The present invention relates to a slave sub which is adapted for use in a perforating gun. An array of identical slave subs are provided in series connection. The slave sub is readily convertible to a jumper or a shunt circuit upon receipt of a pre-selected number of electrical pulses, and is capable of arming and firing its gun upon receipt of a different, pre-selected number of pulses. - 1 -
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