Bar actuated vent assembly

Details Bar actuated vent assembly Bar actuated vent assembly

E - Fixed Constructions

21

B

166/13

E21B 29/02 (2006.01) E21B 43/116 (2006.01) E21B 43/1185 (2006.01)

Patent

CA 1201376

BAR ACTUATED VENT ASSEMBLY ABSTRACT OF THE DISCLOSURE A vent assembly is positioned downhole in a borehole in underlying relationship with respect to a packer device. The vent assembly is connected within a production tubing string and a perforating gun is supported by the lower end of the string. A bar of special design is dropped down through the interior of the tubing and falls through the vent assembly and continues to fall down the tubing string to impact against a gun firing head. The action of the bar passing through the vent assembly moves structures associated therewith to cause a port to assume an open position. The subsequent impact of the bar against the gun firing head detonates the shaped charges of the gun. Formation fluid is then free to flow into the perforations, up the lower annu- lus, into the port of the vent assembly, and up the produc- tion tubing to the surface of the ground. -2-

429771

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