Abstract: A tool and method for reducing azimuthal current. An EM induction tool may comprise a tubular, which may further comprise a body with a central axis and an insulating layer that may be non-azimuthally symmetric with respect to the central axis. The EM induction tool may further comprise a transmitter coupled to the tubular and a receiver coupled to the tubular. A method of reducing azimuthal current may comprise introducing a current through a transmitter into a subterranean formation, wherein the transmitter is coupled to a tubular, allowing an insulating layer of the tubular to at least partially block azimuthal currents originating from the transmitter from flowing on the tubular, wherein the insulating layer is non-azimuthally symmetric, and measuring eddy currents induced by the current with one or more receiver coupled to the tubular.

Abstract: A system, in some embodiments, comprises: a fiber optic cable; first and second sensors to control a length of said cable; and first and second receiver coils that control the first and second sensors, respectively, wherein the first and second sensors maintain said length when the first and second receiver coils receive only a direct signal from a transmitter, wherein the first and second sensors modify said length when the first and second receiver coils receive a scattered signal from a formation.