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DOWNHOLE NUCLEAR MAGNETIC RESONANCE (NMR) TOOL WITH TRANSVERSAL-DIPOLE ANTENNA CONFIGURATION
DOWNHOLE NUCLEAR MAGNETIC RESONANCE (NMR) TOOL WITH TRANSVERSAL-DIPOLE ANTENNA CONFIGURATION
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机译:具有横向双极天线配置的井下核磁共振(NMR)工具
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摘要
FIELD: mining.;SUBSTANCE: invention relates to a transversal-dipole antenna configuration for downhole nuclear magnetic resonance (NMR) based devices, for example, for obtain NMR data from a subterranean region. Nuclear magnetic resonance (NMR) tool for use in a wellbore in a subterranean region, comprising: a magnet assembly to produce a magnetic field in a volume in a subterranean region, comprising: a central magnet having a first axial end and a second, opposite axial end; a first end piece magnet spaced apart from the first axial end of the central magnet, and a second end piece magnet spaced apart from the second axial end of the central magnet, an antenna assembly comprising mutually perpendicular transversal-dipole antennae for producing circular polarised excitation in the volume.;EFFECT: device NMR for use in a well in a subterranean region is disclosed.;20 cl, 4 dwg
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