公开(公告)号：EP3108232A1

公开(公告)日：2016-12-28

申请号：EP15707435.2

申请日：2015-02-18

申请人： Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO

发明人： HUNTER, Alan Joseph ,  DE SOARES SILVA E MELO MOTA, Mariana ,  VOLKER, Arno Willem Frederik

IPC分类号： G01N29/04 ,  E21B47/00 ,  G01N29/07 ,  G01N29/42

CPC分类号： E21B47/0005 ,  E21B33/14 ,  G01N29/043 ,  G01N29/07 ,  G01N29/42 ,  G01N2291/011 ,  G01N2291/0232 ,  G01N2291/0289 ,  G01N2291/2636

摘要： A well bore is inspected to detect cement defects that can give rise to leakage. The well bore comprises an inner metal pipe. Outside the inner metal pipe its configuration may vary with distance from the top of the well bore in terms of concentric pipes outside the inner metal pipe and presence of cement between the pipes. A probe with is lowered through the inner metal pipe. An ultrasound signal is transmitted from the probe into the inner metal pipe and responses to the transmitted signal are received at a series of ultrasound receivers at different axial positions. A selection of a spatial frequency of waves arriving along the axial direction at the ultrasound receivers and/or the apparent velocity of said waves is retrieved dependent on the configuration. The received responses are band pass filtered accordingly. By selecting the band pass filter dependent on the configuration it becomes possible to detect cement defects well outside the innermost pipe from parameters of the earliest arriving pulse from the filtered reflection signal.

摘要翻译： 检查井眼以检测可能引起泄漏的水泥缺陷。 井筒包括内金属管。 在内金属管的外部，其构造可以随着距内孔金属管外侧的同心管的距离与井眼顶部的距离以及管之间的水泥的存在而变化。 探头通过内金属管下降。 超声信号从探头传送到内金属管，并且在不同轴向位置处的一系列超声波接收器处接收对发射信号的响应。 取决于配置，检索在超声波接收机处沿轴向到达的波的空间频率和/或所述波的表观速度的选择。 所接收的响应相应地进行带通滤波。 通过选择取决于配置的带通滤波器，可以从最近的入射脉冲从最近的反射信号的参数中检测出最外层的水泥缺陷。

公开(公告)号：EP2726861B1

公开(公告)日：2017-09-27

申请号：EP12737911.3

申请日：2012-06-29

申请人： Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO

发明人： HUNTER, Alan Joseph ,  VOLKER, Arno Willem Frederik

IPC分类号： G01S7/52 ,  G01N29/06 ,  G01N29/07 ,  G01S15/89

CPC分类号： G01N29/07 ,  G01N29/069 ,  G01N2291/044 ,  G01S7/52049 ,  G01S15/8915 ,  G01S15/8952

摘要： Improved imaging is provided for structures under test that have propagation direction dependent ultrasound propagation speed or position dependent ultrasound propagation speed due to fibrous, coarse grain or single crystalline material. A set reflection points is selected in the structure under test and ultrasound propagation time delays between the reflection point or points on one hand and the plurality of positions on the other hand that fit an observed time delay of the detected reflections are computed. This may be done by means of an iterative method. In the iterative method a synthetically focused ultrasound beam is realized by summing measurements after compensation for propagation time delay from different transmitting transducers to the reflection points. Time delays to receiving transducers are measured from the arrival time of reflections of this synthetically focused ultrasound beam, and the propagation time delay from different transmitting transducers is iteratively adapted until it matches time delays corresponding to the measured arrival times. Time delays to other points in the structure under test are interpolated between the selected reflection points and used in the computation of an image of reflections within the structure under test.

摘要翻译： 针对由于纤维粗粒或单晶材料而具有依赖于传播方向的超声传播速度或取决于位置的超声传播速度的被测结构提供了改进的成像。 在被测结构中选择一组反射点，并且一方面反射点或多个点与另一方面多个位置之间的超声传播时间延迟计算出适合观测到的反射的观测时间延迟。 这可以通过迭代方法完成。 在迭代方法中，合成聚焦的超声波束通过在补偿从不同的发射换能器到反射点的传播时间延迟之后对测量进行求和来实现。 从这个合成聚焦的超声波束的反射到达时间测量接收换能器的时间延迟，并且迭代地调整来自不同发射换能器的传播时间延迟直到它匹配对应于所测量的到达时间的时间延迟。 被测结构中其他点的时间延迟被插值到所选反射点之间，并用于计算被测结构内的反射图像。

公开(公告)号：EP2726861A1

公开(公告)日：2014-05-07

申请号：EP12737911.3

申请日：2012-06-29

申请人： Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO

发明人： HUNTER, Alan Joseph ,  VOLKER, Arno Willem Frederik

IPC分类号： G01N29/06 ,  G01N29/07 ,  G01S15/89

CPC分类号： G01N29/07 ,  G01N29/069 ,  G01N2291/044 ,  G01S7/52049 ,  G01S15/8915 ,  G01S15/8952

摘要： Improved imaging is provided for structures under test that have propagation direction dependent ultrasound propagation speed or position dependent ultrasound propagation speed due to fibrous, coarse grain or single crystalline material. A set reflection points is selected in the structure under test and ultrasound propagation time delays between the reflection point or points on one hand and the plurality of positions on the other hand that fit an observed time delay of the detected reflections are computed. This may be done by means of an iterative method. In the iterative method a synthetically focused ultrasound beam is realized by summing measurements after compensation for propagation time delay from different transmitting transducers to the reflection points. Time delays to receiving transducers are measured from the arrival time of reflections of this synthetically focused ultrasound beam, and the propagation time delay from different transmitting transducers is iteratively adapted until it matches time delays corresponding to the measured arrival times. Time delays to other points in the structure under test are interpolated between the selected reflection points and used in the computation of an image of reflections within the structure under test.

摘要翻译： 对于具有传播方向依赖的超声传播速度或由于纤维，粗粒或单晶材料引起的位置相关超声传播速度的结构，提供了改进的成像。 在被测结构中选择设定的反射点，并计算一方面的反射点或点之间的超声波传播时间延迟和另一方面的适合所检测的反射的观察时间延迟的多个位置。 这可以通过迭代方法来完成。 在迭代方法中，通过对从不同的发射换能器到反射点的传播时间延迟进行补偿后求和来实现合成聚焦超声波束。 从该合成聚焦超声波束的反射的到达时间测量接收换能器的时间延迟，并且迭代地适配来自不同发射换能器的传播时间延迟，直到它匹配对应于测量的到达时间的时间延迟。 在所选择的反射点之间插入被测结构中其他点的时间延迟，并用于计算被测结构内的反射图像。