Apparatus for pipeline inspection

摘要

An apparatus (10) for pipeline inspection includes a sensor unit (14) having an array of ultrasonic sensors (16) for inspecting a pipe wall. The sensor unit (14) includes a skid (18) having an outer surface (20) intended to run adjacent or in contact with a pipe wall. The sensors (16) are arranged in a recess (65) at a predetermined stand off from the outer surface (20) of the skid (18), and the sensor unit (14) includes a flushing system for directing pipeline fluid through the recess (65), for removing debris from within the recess (65) when the skid (18) is pushed up against the pipe wall.