Wells – Processes – With indicating – testing – measuring or locating
Patent
1990-08-10
1991-09-24
Kisliuk, Bruce M.
Wells
Processes
With indicating, testing, measuring or locating
166 651, 166 665, 166373, 166386, 339DIG2, E21B 3406
Patent
active
050506757
ABSTRACT:
An input stimulus provides a necessary input to a microprocessor implemented control system. 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 a 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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Bouchard John H.
Garrana Henry N.
Kisliuk Bruce M.
Schlumberger Technology Corporation
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