Abstract: A casing collar locator, comprising two substantially identical inductor coils attached to a common stem with a fixed separation wherein the inductor coils generate substantially identical electromagnetic fields when an alternating current of substantially equal amplitude, such that a change in current in either the first inductor coil or the second inductor coil indicates a change in the magnetic or conductive materials in proximity to the electromagnetic field generated by the inductor coils, and methods for using such a casing collar locator.