Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2006-07-11
2006-07-11
Gutierrez, Diego (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
Reexamination Certificate
active
07075298
ABSTRACT:
The invention relates to methods for prospecting wells using nuclear magnetic resonance. The inventive method consists in generating a static magnetic field near a well with the aid of a magnet which is made of a conductive rear-earth material in the form of an elongated parallelepiped which is magnetized in a direction perpendicular to a large side surface and longitudinal axis thereof. The width of the magnet is of at least twice as large as the narrow side of said parallelepiped. A radio-frequency coil is arranged on a frame whose diameter is equal to or higher than a diagonal of the cross-section section of a magnet arranged inside the frame. The coil elements are arranged on planes which are parallel to the longitudinal axis of the magnet and vertical with respect to the smaller side thereof arranged in symmetrical sectors which are opposite to the large side surface of the magnet. A compensating unit is arranged along the large side surfaces of the magnet parallel to the longitudinal axis thereof.
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Barlyaev Vadim J.
Khamatdinov Rafis T.
Mityushin Evgeny M.
Fetzner Tiffany A.
Gutierrez Diego
Karotazh
Oathout Mark A.
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