Method and apparatus for a downhole antenna

G - Physics – 01 – V

Patent

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Details

G01V 3/10 (2006.01) G01V 3/28 (2006.01) G01V 3/32 (2006.01)

Patent

CA 2499750

A method and apparatus for a downhole antenna comprising a housing having an outer surface and a longitudinally bored inner cavity, the outer surface having a first slot and a corresponding second slot extending from the outer surface to the longitudinally bored inner cavity; a first removable downhole antenna segment disposed in the first slot in a first transverse cross section of the housing, the first removable downhole antenna segment comprising at least one coil to inductively couple a signal from the longitudinally bored inner cavity to the earth formation. A second removable downhole antenna segment, interchangeable with the first removable downhole antenna segment, disposed in the corresponding second slot, the second slot in a second transverse cross section of the housing, the second removable downhole antenna segment comprising at least one coil to inductively couple a signal from the earth formation to the longitudinally bored inner cavity.

L'invention concerne un procédé et un appareil destinés à une antenne de fond de trou comprenant un logement à surface extérieure et à cavité intérieure percée longitudinalement, la surface extérieure comportant une première fente et une seconde fente correspondante orientée de la surface extérieure vers la cavité intérieure percée longitudinalement, un premier segment amovible d'antenne de fond de trou disposé dans la première fente, dans une première section transversale du logement, ce premier segment amovible comprenant au moins une bobine destinée à coupler par induction un signal de la cavité interne à la formation souterraine. Un second segment amovible d'antenne de fond de trou, interchangeable avec le premier segment amovible d'antenne, disposé dans la seconde fente correspondante, dans une seconde section transversale du logement, comprend au moins une bobine destinée à coupler par induction un signal de la formation souterraine à la cavité intérieure percée longitudinalement.

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