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《Well Logging Technology》 2000-06
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On the Measurement of Thickness of Downhole Casing.

Qiao Wenxiao,Che Xiaohua,Du Guangsheng.WLT, 2000, 24(6): 403~406  
The Methodological investigation on the measurement of thickness of downhole casing with ultrasonic pulse echo technique is carried out both in theory and in experiments. It is shown from the paper that,for normal incidence, there are distinct minima in the broadband spectra of ultrasonic pulse reflected by a steel plate immersed in water. These minima,which are related to the thickness resonance of steel plate,can be easily and accurately used to predict the thickness of the plate. Because the thickness of casing is from 4 to 10 mm,the acoustic frequency should be in the range from 270 to 710 kHz.
【CateGory Index】: P631.8
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Chinese Journal Full-text Database 7 Hits
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9 SUN Zhifeng;CHEN Honghai;LIU Xien;China Oilfield Services Limited;;The finite element analysis of ultrasonic reflection method used in acoustic logging[J];Applied Acoustics;2013-06
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