Annulus pressure firer mechanism with releasable fluid...

Details Annulus pressure firer mechanism with releasable fluid... Annulus pressure firer mechanism with releasable fluid...

E - Fixed Constructions

21

B

166/10

E21B 43/116 (2006.01) E21B 43/118 (2006.01) E21B 43/1185 (2006.01)

Patent

CA 1259560

-30- ABSTRACT A system for perforating a well with an annulus pressure firer is provided by the present invention. A pressure responsive means is positioned in a tubing string uphole a packer and includes a piston movable in response to a pressure differential between the upper annulus pressure and the pressure inside the tubing string. The movement of the piston is transferred through a second, concentric tubing string to a firing head on a perforating gun below the packer. The system includes a means for simultaneously decoupling the concentric tubing strings below the packer to drop the perforating gun to the bottom of the well.

517587

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