Hydraulic system for electronically controlled pressure...

Details Hydraulic system for electronically controlled pressure... Hydraulic system for electronically controlled pressure...

E - Fixed Constructions

21

B

E21B 49/08 (2006.01) E21B 47/00 (2012.01) E21B 47/06 (2012.01)

Patent

CA 2083483

Abstract Of The Disclosure An annulus pressure responsive tool is temporarily deac- tivated so as to no longer be responsive to changes in well annulus pressure.

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