Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate
2010-09-20
2011-11-15
Stephenson, Daniel P (Department: 3676)
Wells
Processes
With indicating, testing, measuring or locating
C340S854300, C324S376000, C166S066000
Reexamination Certificate
active
08056623
ABSTRACT:
A subsurface formation monitoring system and method is described. The system includes a conductive piping structure positionable within a borehole extending into a subsurface formation. The conductive piping structure is electrically decoupled from a production tubing by an insulating packer. The system also includes a downhole installed conductive casing sub that has one or more sensors. The conductive casing sub is electrically coupled to the conductive piping structure. The system further includes a surface installed power and communication module that has an alternate current generator. The power and communication module is electrically coupled to the conductive piping structure via a downhole intermediate module. The alternate current generator can inject a current signal that flows downhole to the conductive casing sub and then returns with sensor measurements to the surface power and communication module via a grounded return electrode that is coupled to the subsurface formation.
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Babour Kamal
Beguin Paul
Chouzenoux Christian
Schmitt Benoit
Du Jianguang
Ro Yong-Suk
Schlumberger Technology Corporation
Stephenson Daniel P
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