Antenna core material for use in mwd resistivity...

Details Antenna core material for use in mwd resistivity... Antenna core material for use in mwd resistivity...

G - Physics

01

V

G01V 3/32 (2006.01) H01F 1/20 (2006.01) H01Q 1/00 (2006.01)

Patent

CA 2489918

The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material wi th explicitly low magnetostriction as an antenna core material for NMR and resistivity devices in a borehole. The probe stuctural geometry facilitates the use of material, which has a relatively low magnectic permeability.

La présente invention concerne une nouvelle utilisation d'un matériau présentant un grand amortissement magnétostrictif interne et/ou d'un matériau présentant une magnétostriction explicitement faible en tant que matériau de noyau d'antenne pour des dispositifs de résonance magnétique nucléaire et de résistivité dans un puits de forage. La géométrie structurelle de sonde facilite l'utilisation du matériau qui présente une perméabilité magnétique relativement faible.

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