-
公开(公告)号：US10253615B2
公开(公告)日：2019-04-09
申请号：US15120017
申请日：2015-02-18
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.
-
公开(公告)号：US20180364199A1
公开(公告)日：2018-12-20
申请号：US16063339
申请日：2016-12-16
IPC分类号： G01N29/04 , G01N29/44 , G01N29/11 , G01N29/265
摘要： A method and device are discussed for determining quantitative parameters of a bond between two elements, for example an adhesive bond between two aluminium plates of an aircraft. A pulsed wave is provided to a first element. The elements, including the bonded region, act as a waveguide. Any discontinuities, an end of the bonded region or imperfections, result in a change of parameters of the waveguide. This results in reflections. By analysing characteristics of the reflections, along with the actual bond length and a signal expected from a good quality bond, an equivalent bond length may be determined.
-
公开(公告)号：US20170058660A1
公开(公告)日：2017-03-02
申请号：US15120017
申请日：2015-02-18
CPC分类号： E21B47/0005 , E21B33/14 , G01N29/043 , G01N29/07 , G01N29/42 , G01N29/44 , 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。 井眼包括内金属管。 在内金属管的外部，其构型可以随着距内孔金属管外面的同心管的距离与井眼顶部的距离而变化，并且在管之间存在水泥。 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，检索在超声波接收器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。 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。
-
-
搜索结果
3 条记录 (耗时 0.014 秒)
