Ultrasonic inspection apparatus and method for locating multiple defects in eccentric wall tubular goods

摘要

An ultrasonic inspection apparatus is shown for locating multiple defects in eccentric wall tubing or goods. A plurality of transducers are arranged in mated pairs, each of the pairs including a sender element for transmitting an ultrasonic shear wave and a receiver element for receiving a reflected ultrasonic wave component from the tubular goods being inspected. Each sender element is a point focus transducer having sufficiently high resolution to maintained detectability of defects in the tubular goods. Each receiver element is a wide focal width transducer having a large effective beam width area to compensate for eccentricity in the wall of the tubular goods.