Method and apparatus for nuclear magnetic resonance...

Details Method and apparatus for nuclear magnetic resonance... Method and apparatus for nuclear magnetic resonance...

G - Physics

01

V

G01V 3/00 (2006.01) G01R 33/44 (2006.01) G01V 3/32 (2006.01)

Patent

CA 2318033

A NMR measurement-while-drilling tool has a permanent magnet (12) with a magnetic field direction substantially perpendicular to the axis of the borehole (36), a steel collar (10) of a non-magnetic material surrounding the magnet, antenna (14) positioned outside the collar, and a soft magnetic material positioned in a predetermined relationship with the collar and the magnet that helps to shape the magnetic field of the tool.

La présente invention concerne un outil RMN de mesure de fond pendant le forage comportant un aimant permanent (12) dont la direction du champ magnétique est sensiblement perpendiculaire à l'axe du trou de forage (36), un collier en acier (10) d'un matériau non magnétique entoure l'aimant, une antenne (14) montée à l'extérieur du collier, un matériau magnétique doux disposé en position prédéterminée par rapport au collier et à l'aimant facilitant la formation du champ magnétique de l'outil.

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