Annulus pressure firer mechanism with releasable fluid conduit f

Details Annulus pressure firer mechanism with releasable fluid conduit f Annulus pressure firer mechanism with releasable fluid conduit f

1987-02-18

1988-02-23

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

Particular tool-engaging means or with tool

285 3, 2851332, 285315, 285319, F16L 3500

Patent

active

047266104

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.

REFERENCES:
patent: 1521482 (1924-12-01), Steele
patent: 4073511 (1978-02-01), Haas et al.
patent: 4074912 (1978-02-01), Bilderbeck et al.
patent: 4343495 (1982-08-01), Nobileau

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