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1. 发明授权

US07689362B2 Determining the impedance of material behind a casing in a borehole 有权
标题翻译：确定井筒中套管后面材料的阻抗
公开(公告)号：US07689362B2
公开(公告)日：2010-03-30
申请号：US11574905
申请日：2005-09-08
申请人： Benoît Froelich , Emmanuel Legendre
发明人： Benoît Froelich , Emmanuel Legendre
IPC分类号： G01V1/48
CPC分类号： G01V1/48
摘要： A method for estimating an impedance of a material behind a casing wall in a borehole, the method comprises exciting the casing wall with an acoustic pulse, and measuring by means of a transducer an experimental acoustic waveform (W) reflected from the casing wall. The method further comprises initializing an impedance parameter (Zin), computing an inverse casing response (Rcas−1) as a function of the impedance parameter (Zin) and a casing thickness parameter (Casin), and deconvoluting the experimental acoustic waveform with the inverse casing response to obtain a transducer response (T). An iterative loop is performed, comprising the computing of an inverse casing response and the deconvoluting of the experimental acoustic waveform by varying the impedance parameter until the transducer response becomes compact in the time domain. The estimated impedance (Zcem) is obtained from the impedance parameter when the transducer response is compact.
摘要翻译：一种用于估计钻孔中的壳体壁后面的材料的阻抗的方法，所述方法包括用声脉冲激发所述壳体壁，并且借助于换能器测量从所述壳体壁反射的实验声波形（W）。该方法还包括初始化阻抗参数（Zin），计算作为阻抗参数（Zin）和壳体厚度参数（Casin）的函数的反向壳体响应（Rcas-1），并将实验声波形与逆套管响应以获得换能器响应（T）。执行迭代循环，包括通过改变阻抗参数来计算反壳体响应和实验声波形的去卷积，直到传感器响应在时域中变得紧凑。当传感器响应紧凑时，从阻抗参数获得估计阻抗（Zcem）。

2. 发明授权

US06526838B1 Ultrasonic fluid meter with improved resistance to parasitic ultrasound waves 失效
标题翻译：超声波流量计具有改善的抵抗寄生超声波的能力
公开(公告)号：US06526838B1
公开(公告)日：2003-03-04
申请号：US09300175
申请日：1999-04-27
申请人： Benoît Froelich , Eric Lavrut , Philippe Hocquet
发明人： Benoît Froelich , Eric Lavrut , Philippe Hocquet
IPC分类号： G01F166
CPC分类号： G01F1/662
摘要： The invention provides a fluid meter comprising ultrasound transducers, attenuation means for attenuating parasitic ultrasound waves of wavelength &lgr;, and constituted by at least one passage in which said waves propagate along a main direction corresponding to a longitudinal dimension a of said passage, said passage having a transverse dimension b perpendicular to a and much smaller than the wavelength &lgr; of the parasitic waves in the propagation medium, said passage comprising a plurality of consecutive passage portions each having a part presenting a reduction in transverse propagation section along the dimension b of the passage, the longitudinal dimension of each passage portion being substantially equal to &lgr;/2.
摘要翻译：本发明提供了一种流量计，包括超声换能器，用于衰减波长羔羊的寄生超声波的衰减装置，并且由至少一个通道构成，其中所述波沿着与所述通道的纵向尺寸a对应的主方向传播，所述通道具有横向尺寸b垂直于并且远小于传播介质中的寄生波的波长长度，所述通道包括多个连续通道部分，每个连续通道部分具有沿着通道的尺寸b的横向传播部分的减小部分每个通道部分的纵向尺寸基本上等于lambd / 2。

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