G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/30 (2006.01) H01Q 1/04 (2006.01) H01Q 1/38 (2006.01) H01Q 7/08 (2006.01)
Patent
CA 2499832
The specification discloses a printed circuit board based ferrite core antenna. The traces (54,58) of the boards (50,52) form the windings for the antenna, and various layers (62A, 62B, 62C) of the printed circuit board hold a ferrite core (74) for the windings in place. The specification further discloses use of such printed circuit board based ferrite core antennas in downhole electromagnetic wave resistivity tools such that azimuthally sensitivity resistivity readings may be taken, and borehole imaging can be performed, even in oil-based drilling fluids.
L'invention concerne une antenne à noyau de ferrite basée sur une carte de circuit imprimé (PCB). Les traces de la carte de circuit imprimé forment les enroulements de l'antenne, et différentes couches de la carte de circuit imprimé maintiennent un noyau de ferrite pour les enroulements en place. L'invention concerne aussi l'utilisation de telles antennes à noyau de ferrite basées sur carte de circuit imprimé dans des outils de fond de trou de mesure de résistivité par onde électromagnétique de façon à réaliser des lectures de résistivité à sensibilité azimutale, ainsi qu'une imagerie de fond de trou, même dans des fluides de forage à base d'huile.
Bittar Michael S.
Hensarling Jesse K.
Emery Jamieson Llp
Halliburton Energy Services Inc.
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