Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate
2005-12-27
2005-12-27
Walker, Zakiya (Department: 3676)
Wells
Processes
With indicating, testing, measuring or locating
C166S250110, C166S254200, C175S050000
Reexamination Certificate
active
06978833
ABSTRACT:
Improved methods, apparatus, and systems for obtaining information regarding a formation, a casing, or fluid within the casing utilize an interrogator and one or more sensing devices attached to a casing in a wellbore. The interrogator, which is located and typically movable inside the wellbore, is effectively a toroidal transformer which includes an elongate conducting body surrounded by a core of high magnetic permeability material and carrying a winding. The sensing device, which is positioned and fixed in an opening cut in the casing, includes a housing, a sensor with associated electronic circuitry and an electrode. The electrode is insulated from the casing by an insulator, and the housing of the sensing device is typically adapted to provide a hydraulic seal with the opening in the casing. The interrogator and sensing device communicate in a wireless manner.
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Bailey Robert
Jundt Jacques
Salamitou Philippe
DeStefanis Jody Lynn
Gaudier Dale
Gordon David P.
Schlumberger Technology Corporation
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