Patent ID: 7751989

Claim:
A system for inspecting a pipeline, comprising: at least two transducers radially disposed around a perimeter of the pipeline, each of the at least two transducers dividing the pipeline into segments, each segment containing a number of sensors, wherein a maximum number of segments is equal to a number of transducers; an arrangement configured to send, receive and store guided wave signals along a length of the pipeline from a first location along the length of the pipeline, wherein the arrangement has a number of pulser channels and a number of receiver channels; and a time delay arrangement connected to the arrangement configured to send, receive and store guided wave signals, the time delay arrangement configured to provide the arrangement configured to send and receive signals for at least two transducers with delay times for adjusting a radial position of the focal points or compensating for at least one of a geometric change or a coating along the length of the pipeline.