| CPC G01N 29/043 (2013.01) [G01N 29/07 (2013.01); G01N 29/225 (2013.01); G01N 29/265 (2013.01); G01M 3/005 (2013.01); G01N 2291/011 (2013.01); G01N 2291/0289 (2013.01); G01N 2291/0422 (2013.01); G01N 2291/106 (2013.01); G01N 2291/2636 (2013.01)] | 11 Claims |

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1. A method of in-service inspection for defects of tubular elements, comprising:
providing an inspection tool with a plurality of ultrasonic transducer elements arranged circumferentially;
positioning the inspection tool on a pig;
flowing the pig and the inspection tool along an interior of the tubular element; operating the plurality of ultrasonic transducer elements to provide a focused ultrasonic beam; and
using reflections of the focused ultrasonic beam to determine the presence of one or more cracks in the tubular element,
wherein providing comprises providing a conical transducer ring with the plurality of ultrasonic transducer elements arranged circumferentially about the conical transducer ring, and
wherein providing comprises providing a plurality of the conical transducer rings so as to form the inspection tool as a tandem transducer ring inspection tool.
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