E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/13, 102/32
E21B 29/02 (2006.01) E21B 43/1185 (2006.01) F42D 1/055 (2006.01)
Patent
CA 1100033
ABSTRACT OF THE DISCLOSURE In the representative embodiments of the new and improved methods and apparatus disclosed herein for controlling multi- charge perforating guns or core-sampling guns, the gun-control system of the present invention includes a selectively-operable multi-contact switch assembly operative from the surface to sequentially connect-a group of electrically-detonatable charges into a firing circuit for consecutively firing the charges on the gun. An array of serially-connected Zener diodes cooperatively associatod with the switch assembly provides indications at the surface showing which of the several charges is then connected into the gun-firing circuit. The new and improved gun-control system also includes a shot-monitoring system which provides additional surface indications from which it can be determined whether the charges on the gun are being successfully fired and, at least approximately, that they are being consecutively fired.
321864
Schlumberger Canada Limited
Smart & Biggar
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