Single-wire selective perforation system

Details Single-wire selective perforation system Single-wire selective perforation system

E - Fixed Constructions

21

B

166/13

E21B 43/116 (2006.01) E21B 43/1185 (2006.01) F42D 1/055 (2006.01)

Patent

CA 1202559

ABSTRACT OF THE INVENTION A method and system for selecting and arming each one of a plurality of firing modules in a single-line selective perforating system is disclosed. A single firing line con nects each firing module one at a time in a sequence to a control unit to receive power and control signals there- from. Each module generates internally a module active time interval in response to being connected to the firing line power. Each time interval has a first portion during which the module generates an identification pulse to the control unit to indicate that another module has been con- nected to the firing line, and a second portion during which the module is enabled to receive a selection pulse from the control unit to terminate further sequencing of the modules to locate the module to be selected. The next module to receive power from the control unit is connected to the firing line by a pass-thru switch in the last con- nected module at the end of its active time interval if that module was not selected for firing.

431545

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