Perforating gun firing tool and method of operation

Details Perforating gun firing tool and method of operation Perforating gun firing tool and method of operation

1987-04-20

1989-02-14

Novosad, Stephen J.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 551, 175 452, E21B 43116

Patent

active

048040444

ABSTRACT:
A tool for activating the firing head of a perforating gun located below a packer by applying pressure to the upper well annulus while maintaining an unimpeded bore between the perforating gun and the pipe string. The tool is provided with a flow valve to prevent flow through the flow bore when closed, and a circulation valve which permits fluid flow from the upper annulus into the flow bore when open and a means of switching the valves so that when one is open the other is closed. A method of using the tool to complete a well is also disclosed.

REFERENCES:
patent: 3675718 (1972-07-01), Kanady
patent: 4484632 (1984-11-01), Vann
patent: 4544034 (1985-10-01), George
patent: 4560000 (1985-12-01), Up Church
patent: 4564076 (1986-01-01), Vann et al.
patent: 4614156 (1986-09-01), Colle, Jr. et al.
patent: 4633952 (1984-04-01), Riggenburg
patent: 4655298 (1987-04-01), George et al.
Vann System Equipment-"Time Delay Firing Head" (1987).
Vann Systems Equipment-"Annulus Pressure Firing Head" (1987).
Vann Systems Equipment-"Releasable Annulus Pressure Firer" (1987).
Vann Systems Equipment-"Pressure Actuated Firing Head" (1987).

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