Enhanced bandwidth transducer method for well integrity measurement

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United States of America Patent

PATENT NO 9976406
SERIAL NO

14794006

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Abstract

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A single critically damped acoustic stack yields a wide frequency range as an acoustic transmitter or as an acoustic transducer having particular use in well integrity determination. The critically damped present acoustic stack utilizes a plurality of stacked acoustic elements such as piezoelectric ceramics that are energized in two manners, providing different center frequencies, each producing a respective center frequency of 100% bandwidth to yield an acoustic stack having a total bandwidth exceeding the bandwidth of an acoustic element or the bandwidth of the plurality of acoustic elements. One manner of energizing is to pulse only one of the acoustic elements. The other manner is to pulse a first acoustic element then pulse a second acoustic element after a delay equal to the amount of time it takes for the first pulse to reach the face of the second acoustic element. The acoustic stack is primarily used in pulse-echo analysis of metal casing wall thickness and cement bond quality detection of wells.

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Patent Owner(s)

Patent OwnerAddress
PIEZOTECH LLC8431 GEORGETOWN ROAD SUITE 300 INDIANAPOLIS IN 46268

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gwin, Patrick Indianapolis, US 2 25
Lautzenhiser, Frans Zionsville, US 12 36
Matam, Mahesh Zionsville, US 4 16

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