Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2011-06-28
2011-06-28
Koval, Melissa J (Department: 2858)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S346000
Reexamination Certificate
active
07969150
ABSTRACT:
An apparatus and method is disclosed for measuring a parameter of an earth formation surrounding a wellbore. A Nuclear Magnetic Resonance (NMR) tool and at least one second tool are conveyed in the wellbore on a wireline, the NMR tool having a magnetic influence on a region of the wellbore. The magnetic influence of the NMR tool is removed from the region of the wellbore using a demagnetizing device. The parameter of the earth formation is measured using the at least one second tool. A second demagnetizing device may be used to remove the magnetic influence of the at least one second tool from the region of the wellbore.
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Wilson et al.; “Wellbore Position Errors Caused by Drilling-Fluid Contamination,” SPE 75329, SPE Drilling & Completion, Dec. 2001, pp. 208-213.
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Castillo Homero C.
Kruspe Thomas
Baker Hughes Incorporated
Fetzner Tiffany A
Koval Melissa J
Mossman Kumar & Tyler PC
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