Pressure pulse sensor
    65.
    发明公开
    Pressure pulse sensor 审中-公开
    Druckpulsfühler

    公开(公告)号:EP1091217A2

    公开(公告)日:2001-04-11

    申请号:EP00308287.2

    申请日:2000-09-22

    IPC分类号: G01V1/52 B06B1/06

    CPC分类号: G01V1/186 B06B1/0611 G01V1/52

    摘要: A pressure pulse sensor, and, in particular, a hydrophone, provide enhanced functionality and convenience in detecting pressure pulses. The hydrophone (30) includes a stack (34) of disc-shaped lead titanate piezoelectric crystals (32) enclosed within an epoxy membrane (38) and a mounting portion (44) which is aligned with a center of mass (48) of the crystal stack (34).

    摘要翻译: 压力脉冲传感器,特别是水听器,在检测压力脉冲方面提供增强的功能和便利性。 水听器(30)包括封装在环氧膜(38)内的圆盘形钛酸铅压电晶体(32)的叠层(34)和与所述环形膜(38)的质心(48)对准的安装部分 晶体叠层(34)。

    METHOD AND APPARATUS FOR ACOUSTIC SHEAR WAVE LOGGING.
    67.
    发明公开
    METHOD AND APPARATUS FOR ACOUSTIC SHEAR WAVE LOGGING. 失效
    声波剪切波的记录方法与装置。

    公开(公告)号:EP0623223A4

    公开(公告)日:1996-02-21

    申请号:EP93904551

    申请日:1993-01-21

    申请人: MOBIL OIL CORP

    CPC分类号: G01V1/52 E21B47/02208

    摘要: A borehole logging tool (13) having a dipole acoustic energy source (16) and a plurality of spaced-apart dipole acoustic energy receivers (17) is lowered into a deviated borehole (14) penetrating a subsurface formation. The dipole source (16) and receivers (17) are positioned eccentrically with respect to the borehole axis and are focused in the same direction perpendicular to the axis of the borehole tool as well as perpendicular to the direction of such eccentricity so that received tube wave amplitudes are minimized with respect to received shear wave amplitudes.