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1. (WO2001004969) HIGH RESOLUTION FOCUSED ULTRASONIC TRANSDUCER

Pub. No.:    WO/2001/004969    International Application No.:    PCT/US2000/019266
Publication Date: Fri Jan 19 00:59:59 CET 2001 International Filing Date: Sat Jul 15 01:59:59 CEST 2000
IPC: B06B 1/02
B06B 3/04
G01N 29/24
G10K 11/00
G10K 11/30
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: BIRCHAK, James, E.
MILLER, Alvin, B.
STROUD, James, W.
Title: HIGH RESOLUTION FOCUSED ULTRASONIC TRANSDUCER
Abstract:
The present invention relates to transducer packages which utilize lenses (204) made of unpoled piezoelectric material or machined metal coupled to an impedance matched backing (212). 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.