Method and apparatus for LWD shear velocity measurement
    1.
    发明公开
    Method and apparatus for LWD shear velocity measurement 有权
    用于测量LWD Sheargeschwindigkeit方法和装置

    公开(公告)号:EP1505411A3

    公开(公告)日:2007-12-19

    申请号:EP04024171.3

    申请日:2001-11-13

    IPC分类号: G01V1/44 G01V1/52 G01V1/28

    CPC分类号: G01V1/44

    摘要: The logging tool (90) of this invention includes a transmitter (105) conveyed on a drilling collar for exciting a quadrupole signal (106) in a borehole being drilled by a drill bit and a receiver for receiving the signal. The transmitter is operated at a frequency below the cut-off frequency of the quadrupole collar mode. The received signal consists primarily of the formation quadrupole mode which, at low frequencies, has a velocity that approaches the formation shear velocity. The transmitter, in one embodiment, consists of eight equal sectors of a piezoelectric cylinder mounted on the rim of the drilling collar. The value of the cut- off frequency is primarily dependent on the thickness of the drilling collar. Alternatively, the transmitter may be operated to produce both the collar mode and the formation mode and a processor may be used to filter out the collar mode.

    Casing resonant radial flexural modes in cement bond evaluation
    2.
    发明公开
    Casing resonant radial flexural modes in cement bond evaluation 审中-公开
    Resonante radiale Biegemodi der Verkleidung bei der Zementationsbeurteilung

    公开(公告)号:EP1795919A2

    公开(公告)日:2007-06-13

    申请号:EP06256295.4

    申请日:2006-12-11

    IPC分类号: G01V1/50 E21B47/00

    CPC分类号: E21B47/0005 G01V1/50

    摘要: A method useful for evaluating the presence and/or the quality of the cement bond (44) of a downhole tubular (36). The method involves measuring radial resonance modes of the tubular (36), and comparing those measured values to the unbound tubular resonant values of a calibration ring. For a well bonded tubular (36), the measured radial resonance should be greater than that of the unbound tubular calibration ring. In regions where a fluid, such as water surrounds the outside of the tubular (36), or the cement (44) is otherwise not bonded to the outer surface of the tubular (36), the measured response should be less than the calibrated response. The calibration ring should have the same diameter, wall thickness, and be made of the same material as the tubular (36).

    摘要翻译: 一种用于评估井下管(36)的水泥粘结(44)的存在和/或质量的方法。 该方法包括测量管(36)的径向共振模式,并将这些测量值与校准环的未结合的管状共振值进行比较。 对于良好结合的管(36),测量的径向共振应大于未结合的管状校准环的径向共振。 在诸如水的流体围绕管状物(36)的外部或者水泥(44)否则不结合到管状物(36)的外表面的区域中,测量的响应应小于校准的反应 。 校准环应具有相同的直径,壁厚,并由与管(36)相同的材料制成。

    Casing resonant radial flexural modes in cement bond evaluation
    4.
    发明公开
    Casing resonant radial flexural modes in cement bond evaluation 审中-公开
    在Zementationsbeurteilung面板的谐振径向弯曲模式

    公开(公告)号:EP1795919A3

    公开(公告)日:2011-07-06

    申请号:EP06256295.4

    申请日:2006-12-11

    IPC分类号: G01V1/50 E21B47/00

    CPC分类号: E21B47/0005 G01V1/50

    摘要: A method useful for evaluating the presence and/or the quality of the cement bond (44) of a downhole tubular (36). The method involves measuring radial resonance modes of the tubular (36), and comparing those measured values to the unbound tubular resonant values of a calibration ring. For a well bonded tubular (36), the measured radial resonance should be greater than that of the unbound tubular calibration ring. In regions where a fluid, such as water surrounds the outside of the tubular (36), or the cement (44) is otherwise not bonded to the outer surface of the tubular (36), the measured response should be less than the calibrated response. The calibration ring should have the same diameter, wall thickness, and be made of the same material as the tubular (36).

    Method and apparatus for prediction control in drilling dynamics using neural network
    5.
    发明公开
    Method and apparatus for prediction control in drilling dynamics using neural network 审中-公开
    Verfahren und Vorrichtung zum Vorhersehen von Bohrparametern mittels neuraler Netzwerke

    公开(公告)号:EP1193366A2

    公开(公告)日:2002-04-03

    申请号:EP01308364.7

    申请日:2001-10-01

    IPC分类号: E21B44/00

    CPC分类号: E21B44/005 E21B2041/0028

    摘要: The present invention provides a drilling system that utilizes a neural network for predictive control of drilling operations. A downhole processor controls the operation of the various devices in a bottom hole assembly to effect changes to drilling parameters and drilling direction to autonomously optimize the drilling effectiveness. The neural network iteratively updates a prediction model of the drilling operations and provides recommendations for drilling corrections to a drilling operator.

    摘要翻译: 本发明提供一种利用神经网络进行钻井作业预测控制的钻井系统。 井底处理器控制井底组件中的各种装置的操作,以实现钻孔参数和钻井方向的改变以自主优化钻井效率。 神经网络迭代地更新钻井操作的预测模型,并为钻井操作者提供钻井校正的建议。

    Resonant acoustic transmitter apparatus and method for signal transmission
    8.
    发明公开
    Resonant acoustic transmitter apparatus and method for signal transmission 审中-公开
    Akustischer Resonanz-Transmitter und Verfahren zurSignalübertragung

    公开(公告)号:EP1193368A2

    公开(公告)日:2002-04-03

    申请号:EP01308399.3

    申请日:2001-10-02

    IPC分类号: E21B47/16 E21B47/18

    CPC分类号: E21B47/16

    摘要: The present invention includes a well system having a sensor; a controller for converting the sensor output, a signal conducting mass, an actuator for inducing an acoustic wave the signal conducting mass, a reaction mass, an acoustic wave receiver up-hole, and a processor for processing a signal from the acoustic wave receiver and for delivering the processed signal to an output device.

    摘要翻译: 本发明包括具有传感器的井系统; 用于转换传感器输出的控制器,信号传导质量块,用于感应声波的信号传导质量的致动器,反作用质量块,声波接收器上孔以及用于处理来自声波接收器的信号的处理器,以及 用于将经处理的信号传送到输出设备。

    The use of lamb waves in cement bond logging
    10.
    发明公开
    The use of lamb waves in cement bond logging 有权
    Verwendung von Lambwellen bei der Messung von Zementation

    公开(公告)号:EP1698912A2

    公开(公告)日:2006-09-06

    申请号:EP06003261.2

    申请日:2006-02-17

    IPC分类号: G01V1/44 E21B47/00

    CPC分类号: G01V1/50 E21B47/0005

    摘要: A method and apparatus useful to determine the integrity of a cement bond log disposed in the annular space between a casing and a wellbore. The method and apparatus induce a Lamb wave in the casing and into the wellbore. The Lamb wave attenuates upon passage through the cement bond log. The integrity of the cement bond log can be determined through an analysis and evaluation of the attenuation results.

    摘要翻译: 一种用于确定设置在壳体和井眼之间的环形空间中的水泥结合对数的完整性的方法和装置。 该方法和装置在套管中引入兰姆波并进入井眼。 兰姆波在通过水泥债券日志时减弱。 可以通过对衰减结果的分析和评估来确定水泥结合对数的完整性。