Electromagnetic casing inspection tool with azimuthal sensitivity

A downhole logging tool for inspecting a well casing, comprising:

• a housing adapted to be supported in the well casing by a support cable;
• plural transmitters positioned in the housing in circumferentially-spaced apart relation and being operable to generate plural magnetic fields;
• a receiver positioned in the housing and being operable to sense the magnetic fields with azimuthal sensitivity;
• and
• electronic circuitry operatively coupled to the receiver to determine a parameter of the sensed magnetic field and determine a characteristic of the well casing based on the parameter.

A method of downhole logging a well having a well casing, comprising:

• suspending a housing in the well casing by a support cable;
• energizing a transmitter positioned in the housing to generate a magnetic field;
• sensing the magnetic field with plural receivers positioned in the housing in circumferentially-spaced apart relation, the plural receivers sensing the magnetic field with azimuthal sensitivity;
• and
• determining a parameter of the sensed magnetic field and a characteristic of the well casing based on the parameter.

A method of downhole logging a well having a well casing, comprising:

• suspending a housing in the well casing by a support cable;
• energizing plural transmitter coils positioned in the housing in circumferentially-spaced apart relation to generate plural magnetic fields;
• sensing the magnetic fields with a receiver positioned in the housing;
• and
• determining a parameter of the sensed magnetic fields and a characteristic of the well casing based on the parameter.

A transceiver for use in a downhole logging tool for inspecting a well casing, comprising:

• a transceiver antennae sleeve having a hub and plural circumferentially-spaced radially extending fins;
• an electrically insulating receiver segment positioned between each two adjacent fins;
• and
• a first transceiver coil wound on each of the transceiver segments and being operable to be energized to generate a magnetic field or to receive a generated magnetic field separately from the other transceiver coils to provide for azimuthally sensitive measurements of the downhole logging tool.