Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate
2008-06-30
2010-12-21
LeDynh, Bot L (Department: 2858)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
C324S367000, C324S370000
Reexamination Certificate
active
07855560
ABSTRACT:
A method and system for measuring formation resisitivity is achieved by introducing an electrical signal into the formation. The current of the introduced electrical signal is then sensed, producing an analog voltage signal as a measurement of the formation. The introduced electrical signal is compared with the measured signal of the formation. The comparison is made in a quadrature demodulation device, producing an in-phase demodulated signal. A quasi-direct-current signal is extracted from the in-phase demodulated signal, producing an analog measurement related to the resistivity of the formation.
REFERENCES:
patent: 6975121 (2005-12-01), Strack et al.
patent: 7579841 (2009-08-01), San Martin et al.
Forgang Stanislav
Zhao Jinsong
Arnold Gordon T.
Arnold & Knobloch, L.L.P.
Baker Hughes Incorporated
Knobloch Charles S.
LeDynh Bot L
LandOfFree
Analog front-end coherent in-phase demodulation data... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Analog front-end coherent in-phase demodulation data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analog front-end coherent in-phase demodulation data... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4159634