Perforating gun firing tool and method of operation
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United States of America Patent
Stats
-
Feb 14, 1989
Grant Date -
N/A
app pub date -
Apr 20, 1987
filing date -
Apr 20, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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