Method and apparatus for firing borehole perforating apparatus

Details Method and apparatus for firing borehole perforating apparatus Method and apparatus for firing borehole perforating apparatus

E - Fixed Constructions

21

B

166/11

E21B 43/118 (2006.01) E21B 43/1185 (2006.01)

Patent

CA 1271408

METHOD AND APPARATUS FOR FIRING BOREHOLE PERFORATING APPARATUS Abstract of the Disclosure Method and apparatus for firing perforating apparatus in a borehole. A pressure actuated firing assembly is run into the borehole on the end of a cable and latched onto a perforating apparatus. The cable is removed and pressure is applied to the tubing annulus. At a predetermined pressure the firing assembly is armed. After arming pressure is released from the tubing annulus during a time delay period before the firing assembly impacts a percussion firing head to thereby detonate the perforating apparatus.

544105

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