Compact magnetic sensor for multi-component induction and micro-resistivity measurements

摘要

The present invention provides a compact magnetic sensor capable of use in pad mounted applications and field focusing applications. The present invention provides an induction tool with a compact induction sensor having electromagnetic transmitters wound on a longitudinal core member of a C-clamp shaped transmitter core. The tool is suitable for transmitting magnetic excitation fields in multiple directions, both parallel and transverse to the tool's longitudinal axis with minimal susceptibility to errors associated with parasitic eddy currents induced in the metal components surrounding the transmitter and receiver coils. The horizontal (transverse) members of the C-clamp shaped transmitter core can be rotated to orient a magnetic excitation flux path passing between the horizontal (transverse) members and through the formation. The horizontal members can be replicated on a single longitudinal member to shape the flux path.