Coiled tubing and casing inspection based on magnetic flux leakage measurements

A system comprising:

• one or more memories collectively storing instructions;
• and
• one or more processors communicatively coupled to the one or more memories, the one or more processors being collectively configured to execute the instructions to cause the system to:
• operate an inspection tool comprising at least one sensor arranged in proximity to a coiled tubing;
• obtain, using the inspection tool, a first set of magnetic flux leakage (MFL) measurements associated with a first liftoff distance of the at least one sensor with respect to a surface of the coiled tubing;
• generate a second set of MFL measurements associated with a second liftoff distance of the at least one sensor with respect to the surface of the coiled tubing, based on performing a filtering operation on the first set of MFL measurements, the second liftoff distance being less than the first liftoff distance;
• and
• determine at least one defect of the coiled tubing, based on the second set of MFL measurements.

A non-transitory computer-readable storage medium comprising computer-executable code, which when executed by one or more processors of a computing system, perform an operation comprising:

• operating an inspection tool comprising at least one sensor arranged in proximity to a coiled tubing;
• obtaining, using the inspection tool, a first set of magnetic flux leakage (MFL) measurements associated with a first liftoff distance of the at least one sensor with respect to a surface of the coiled tubing;
• generating a second set of MFL measurements associated with a second liftoff distance of the at least one sensor with respect to the surface of the coiled tubing, based on performing a filtering operation on the first set of MFL measurements, the second liftoff distance being less than the first liftoff distance;
• and
• determining at least one defect of the coiled tubing, based on the second set of MFL measurements.