Pressure sensor assembly for wellbore

Details Pressure sensor assembly for wellbore Pressure sensor assembly for wellbore

E - Fixed Constructions

21

B

E21B 47/01 (2012.01) E21B 23/04 (2006.01) E21B 29/02 (2006.01) E21B 43/117 (2006.01) E21B 47/06 (2012.01)

Patent

CA 2373498

A casing-conveyed downhole pressure sensor assembly is provided. The assembly comprises a first sub that forms a charge chamber and a passage in fluid communication with the adjacent external formation. A second sub forms a sensor chamber containing a pressure sensor. The sensor is connected by a conduit with the passage so that the conduit and passage together form a passageway for transmitting formation pressure to the sensor. A shaped charge is positioned in the charge chamber and is oriented so that, when the charge is detonated, it forms a perforation intersecting the passage and extending through the cement layer into the formation. Thus an optional 'back up' pressure transmission passageway is available.

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