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    Dual mode multiple-element resonant cavity piezoceramic borehole energy source
    1.
    发明授权
    Dual mode multiple-element resonant cavity piezoceramic borehole energy source 失效
    双模多元谐振腔压电陶瓷井眼能源

    公开(公告)号：US6135234A

    公开(公告)日：2000-10-24

    申请号：US2474

    申请日：1998-01-02

    Applicant: Jerry M. Harris ,  Bruce P. Marion ,  Duane Canny

    Inventor： Jerry M. Harris ,  Bruce P. Marion ,  Duane Canny

    IPC: B06B1/06 ,  G01V1/52 ,  G01V1/40

    CPC classification number: B06B1/0655 ,  G01V1/52 ,  Y10S367/911

    Abstract: A dual mode multiple-element resonant cavity piezoceramic borehole energy source is disclosed. Thus, a source for generating detectable seismic waves in a wellbore is provided which is capable of transmitting useful signals over long distances between the source and the related receiver or receivers. A liquid-filled elongated column is provided which defines a longitudinal axis and has a resonant frequency. A resonator comprising at least one substantially cylindrical piezoelectric element having an axis approximately parallel to the axis of the borehole for inducing seismic waves in the borehole is furnished. The resonator is constructed and arranged for vibrating at the first resonant frequency, and is also constructed and arranged for vibrating at a second frequency in a hoop mode to generate seismic waves having the second frequency.

    Abstract translation: 公开了一种双模多元件谐振腔压电陶瓷井眼能源。 因此，提供了用于在井筒中产生可检测的地震波的源，其能够在源和相关接收器或接收器之间的长距离上传输有用信号。 提供液体填充的细长柱，其限定纵轴并具有共振频率。 提供了一种包括至少一个基本上圆柱形的压电元件的谐振器，该压电元件具有大致平行于钻孔轴线的轴线，用于引导钻孔中的地震波。 谐振器构造和布置成在第一共振频率下振动，并且还被构造和布置成在环形模式下以第二频率振动，以产生具有第二频率的地震波。

    Low impedance down-hole acoustic source for well logging
    2.
    发明授权
    Low impedance down-hole acoustic source for well logging 失效
    用于测井的低阻抗井下声源

    公开(公告)号：US5069308A

    公开(公告)日：1991-12-03

    申请号：US611926

    申请日：1990-11-13

    Applicant: Hezhu Yin ,  Jerry M. Harris ,  Amos M. Nur

    Inventor： Hezhu Yin ,  Jerry M. Harris ,  Amos M. Nur

    IPC: G01V1/145 ,  G10K9/12

    CPC classification number: G01V1/145 ,  G10K9/121

    Abstract: A low impedance acoustic source suitable for used in down-hole well logging includes a mechanical transformer for impedance matching of the source to the surrounding environment. Elliptically shaped flexible beams are positioned along the long axis of an ellipse, and a pump is oriented along the long axis of the ellipse for driving the flexible beams. In a preferred embodiment the pump comprises first and second stacks of transducers which engage the flexible beams at opposing ends with the two stacks of transducers operating in a push-pull mode of operation. Rigid extension at opposing ends of the flexible beams function as levers in translating the motion of the transducers to the flexible beams. A rigid support rod is positioned along the long axis of the ellipse in engagement with the rigid extensions at fulcrum points, and an adapter associated with each stack of ceramic transducers engages and drives the rigid members about the fulcrum point. In a preferred embodiment the flexible beams permit fluid to flow around the beams for pressure equalization in deep hole applications.

    Abstract translation: 适合用于井下测井的低阻抗声源包括用于源与周围环境的阻抗匹配的机械变压器。 椭圆形柔性梁沿着椭圆的长轴定位，并且泵沿着椭圆的长轴定向以驱动柔性梁。 在优选实施例中，泵包括第一和第二组换能器，其在相对端处接合柔性梁，其中两组换能器以推挽操作模式工作。 柔性梁的相对端处的刚性延伸部将转换器的运动转换为柔性梁的作用。 刚性支撑杆沿着椭圆的长轴定位成在支点处与刚性延伸部接合，并且与每个陶瓷换能器叠相关联的适配器接合并驱动刚性构件围绕支点。 在优选实施例中，柔性梁允许流体围绕梁流动以在深孔应用中进行压力平衡。

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