Boring or penetrating the earth – Boring with explosion in inaccessible hole – With bore condition firing control – or compensating means
Patent
1989-12-20
1990-11-20
Kisliuk, Bruce M.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
With bore condition firing control, or compensating means
175 455, 175 456, 166 551, 166297, E21B 431185
Patent
active
049711601
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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Bouchard John H.
Garrana Henry N.
Kisliuk Bruce M.
Schlumberger Technology Corporation
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