High resolution focused ultrasonic transducer, for LWD method of making and using same

摘要

The present invention relates to transducer packages which utilize lenses made of unpoled piezoelectric material or machined metal coupled to an impedance matched backing. The new transducer packages have minimal reverberation which allow for nearer standoff measurements, improved bond measurements, the ability to detect of thinner cement layers behind casing, and provide for better estimations of formation surface texture.