Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus
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United States of America Patent
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-
Nov 20, 1990
Grant Date -
N/A
app pub date -
Dec 20, 1989
filing date -
Dec 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An input stimulus provides a necessary input to a microprocessor implemented control system. An output signal from the control system may fire one or more perforating guns of a perforating apparatus or it may change the state of a valve in a well testing apparatus. The input stimuli may comprise a pressure pulse transmitted down a well annulus disposed between a tubing string and borehole casing, a pressure pulse transmitted internally down the tubing string, an output of a strain gauge for sensing the set down weight of a well tool disposed in the borehole, or an output of an inductive coupler connected to the well surface.
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