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1. 发明申请

WO2013090596A1 ENHANCED BANDWIDTH TRANSDUCER FOR WELL INTEGRITY MEASUREMENT 审中-公开
标题翻译：增强带宽传感器，用于良好的完整性测量
公开(公告)号：WO2013090596A1
公开(公告)日：2013-06-20
申请号：PCT/US2012/069537
申请日：2012-12-13
申请人： MATAM, Mahesh , LAUTZENHISER, Frans , GWIN, Pat , PIEZOTECH LLC
发明人： MATAM, Mahesh , LAUTZENHISER, Frans , GWIN, Pat
IPC分类号： G01V1/02 , B06B1/02
CPC分类号： E21B47/00 , B06B1/0614 , E21B47/0005 , E21B47/091 , E21B47/16 , G01B17/02 , H01L41/083 , H01L41/09 , H04B11/00
摘要： 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 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 elements are bonded together and onto a critically damped backing of tungsten, The assembly is retained in a housing that is preferably made of PEEK. The acoustic stack is primarily used in pulse-echo analysis of metal casing wall thickness and cement bond quality detection of wells.
摘要翻译：单个临界阻尼声堆叠产生作为声发射器的宽频率范围，或作为在完整性确定中特别有用的声换能器。临界阻尼的本声堆叠利用多个堆叠的声学元件，例如压电陶瓷，其以两种方式通电，提供不同的中心频率，每个中心频率产生相应的100％带宽的中心频率，以产生总带宽超过声学元件的带宽或多个声学元件的带宽。一种激励方式是仅脉冲声学元件之一。另一种方式是脉冲第一声学元件，然后在等于第一脉冲到达第二声学元件的面部所花费的时间的延迟之后脉冲第二声学元件。声学元件结合在一起并在钨的极限阻尼背衬上。组件保持在优选由PEEK制成的外壳中。声堆叠主要用于井的金属套管壁厚度和水泥粘结质量检测的脉冲回波分析。

2. 发明申请

WO2013166129A2 LOW FREQUENCY BROAD BAND ULTRASONIC TRANSDUCERS 审中-公开
标题翻译：低频宽带超声波传感器
公开(公告)号：WO2013166129A2
公开(公告)日：2013-11-07
申请号：PCT/US2013/039038
申请日：2013-05-01
申请人： PIEZOTECH LLC
发明人： LAUTZENHISER, Frans , MATAM, Mahesh , MOLZ, Eric
IPC分类号： H01L41/053 , H01L41/04
CPC分类号： H01L41/053 , B06B1/0685 , E21B47/0005 , G01S7/521 , G10K11/002 , H01L41/04
摘要： Low frequency pulse-echo ultrasonic transducers are provided especially suited for use in downhole cement bond evaluation, but usable for various applications. One frequency pulse-echo ultrasonic transducer comprises a transducer stack having alternating layers of a piezoceramic element and an ultrasonic attenuating element that is preferably acoustic impedance matched to the piezoceraniic elements in order to reduce the Q of the transducer stack. Another low frequency pulse-echo ultrasonic transducer comprises an assembly having the present transducer stack disposed on an acoustic attenuating backing and a front face. Yet another low frequency pulse-echo ultrasonic transducer comprises a transducer composite made from a lead metaniobate. Still another frequency pulse-echo ultrasonic transducer comprises a composite stack. A further low frequency pulse-echo ultrasonic transducer comprises a composite stack, wherein multiple drive elements allow driving individual elements at different times. The transducers may be driven in a multiple-pulse time delayed manner.
摘要翻译：提供低频脉冲回波超声波换能器，特别适用于井下水泥粘结评估，可用于各种应用。单频脉冲回波超声波换能器包括具有交替的压电陶瓷元件层和超声波衰减元件的换能器叠层，其优选地是与压电元件的声阻抗匹配，以便减小换能器叠层的Q。另一个低频脉冲回波超声波换能器包括一个组件，该组件具有设置在声衰减背衬和前表面上的本换能器组。另一种低频脉冲回波超声波换能器包括由导线偏心片制成的换能器复合体。另一频率脉冲回波超声波换能器包括复合叠层。另一低频脉冲回波超声波换能器包括复合叠层，其中多个驱动元件允许在不同时间驱动各个元件。换能器可以以多脉冲时间延迟的方式被驱动。

3. 发明申请

WO2013116258A1 PULSE-ECHO ACOUSTIC TRANSDUCER 审中-公开
标题翻译：脉冲电声传感器
公开(公告)号：WO2013116258A1
公开(公告)日：2013-08-08
申请号：PCT/US2013/023722
申请日：2013-01-30
申请人： PIEZOTECH, LLC
发明人： LAUTZENHISER, Frans , MATAM, Mahesh
IPC分类号： H04R17/00 , H01L41/09
CPC分类号： B06B1/0644 , B06B1/067 , B06B1/0677 , E21B47/101 , H01L41/1132 , H01L41/1875 , H04R17/025
摘要： A piezoceramic pulse-echo acoustic transducer includes protection layers for the piezoceramic that are tuned to the piezoceramic so as to optimize pulse-echo signal response (i.e. greater output signal bandwidth and increased return signal sensitivity)- The protection layers are tuned to the piezoceramic via material selection and thickness. The acoustic transducer has a backing, a piezoceramic adjacent the backing, an intermediate protection layer adjacent the piezoceramic, and a front protection layer adjacent the intermediate protection layer and opposite the piezoceramic. The front and intermediate protection layers are tuned to the piezoceramic via their acoustic impedance such that the acoustic impedance of the intermediate layer is greater than the acoustic impedance of the piezoceramic and of the front protection lay er. The acoustic impedance of the fron t protection lay er is less than the acoustic impedance of the piezoceramic.
摘要翻译：压电脉冲回波声换能器包括调谐到压电陶瓷的压电陶瓷的保护层，以优化脉冲回波信号响应（即更大的输出信号带宽和增加的返回信号灵敏度） - 保护层被调谐到压电陶瓷通孔材料选择和厚度。声换能器具有背衬，邻近背衬的压电陶瓷，邻近压电陶瓷的中间保护层，以及与中间保护层相邻并与压电陶瓷相对的前保护层。前保护层和中间保护层通过其声阻抗调节到压电陶瓷，使得中间层的声阻抗大于压电陶瓷和前保护层的声阻抗。保护层的声阻抗小于压电陶瓷的声阻抗。

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