Extra bucking coils as an alternative way to balance...

Details Extra bucking coils as an alternative way to balance... Extra bucking coils as an alternative way to balance...

H - Electricity

01

F

H01F 38/14 (2006.01) G01V 3/10 (2006.01) G01V 3/28 (2006.01)

Patent

CA 2537778

An electromagnetic logging tool is disclosed that includes a support; and at least one four-coil array disposed on the support, wherein the at least one four-coil array comprises: a transmitter, a bucking coil, a receiver, and a trim coil. A method for balancing an induction array is disclosed that includes applying an alternating current to a transmitter of the induction array that comprises the transmitter, a bucking coil and a receiver; measuring a mutual coupling between the transmitter and the receiver; and adding an extra bucking coil, if the mutual coupling exceeds a selected criterion.

L'invention concerne un instrument de diagraphie électromagnétique qui comprend un support; ainsi qu'au moins un réseau à quatre bobines disposé sur le support, où le réseau à quatre bobines se compose : d'un transmetteur, d'une bobine de compensation, d'un récepteur et d'une bobine de garniture. Une méthode permettant d'équilibrer un réseau d'induction est divulguée qui comprend l'application d'un courant alternatif à un transmetteur du réseau d'induction qui se compose d'un transmetteur, d'une bobine de compensation et d'un récepteur; la mesure d'un couplage mutuel entre le transmetteur et le receveur; ainsi que l'ajout d'une bobine de compensation supplémentaire, si le couplage mutuel dépasse un critère choisi.

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