Electromagnetic casing inspection tool with azimuthal sensitivity

摘要

Various downhole logging tools and methods of using and making the same are disclosed. In one aspect, a downhole logging tool (10) for inspecting a well casing (20) is provided that includes a housing (60) adapted to be supported in the well casing by a support cable (13). A transmitter (20) is positioned in the housing and operable to generate a magnetic field. Plural receivers (170, 190) are positioned in the housing in circumferentially-spaced apart relation and are operable to sense the magnetic field with azimuthal sensitivity. Electronic circuitry is operatively coupled to the receivers to determine a parameter of the sensed magnetic field and determine a characteristic of the well casing based on the parameter.