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    Stress detection tool using magnetic barkhausen noise
    1.
    发明授权
    Stress detection tool using magnetic barkhausen noise 有权
    应力检测工具使用磁性巴克豪森噪音

    公开(公告)号：US08797033B1

    公开(公告)日：2014-08-05

    申请号：US13253600

    申请日：2011-10-05

    申请人： Bruce I. Girrell ,  Thomas A. Johnson ,  Ameet V. Joshi ,  Douglas W. Spencer ,  Gaurav D. Kulkarni ,  David J. Henderson

    发明人： Bruce I. Girrell ,  Thomas A. Johnson ,  Ameet V. Joshi ,  Douglas W. Spencer ,  Gaurav D. Kulkarni ,  David J. Henderson

    IPC分类号： G01V3/00

    CPC分类号： E21B47/0006 ,  E21B29/00

    摘要： A stress detecting system and method operable to detect stresses in a conduit or pipe includes a tool movable along a conduit or pipe and operable to generate a magnetic field. The tool is operable to sense magnetic Barkhausen noise within the conduit, such as within a wall of the conduit, in response to the tool generating the magnetic field. The stress detecting system is operable to detect a change in stress along the conduit responsive to an output of the tool. The system may detect changes in stress that are caused by geological changes or shifting or thermal changes at or near the conduit to determine changes in stress along the conduit and changes in stress along the conduit over time and during use of the conduit.

    摘要翻译： 可操作以检测管道或管道中的应力的应力检测系统和方法包括可沿导管或管道移动并可操作以产生磁场的工具。 该工具可操作以响应于产生磁场的工具，在导管内感测磁巴克豪森噪声，例如在管道的壁内。 应力检测系统可操作以响应于工具的输出来检测沿管道的应力变化。 该系统可以检测由导管处或附近的地质变化或移动或热变化引起的应力变化，以确定沿着管道的应力变化以及随着时间和管道使用期间沿导管的应力变化。

    Pipe stress detection tool using magnetic barkhausen noise
    2.
    发明授权
    Pipe stress detection tool using magnetic barkhausen noise 有权
    管道应力检测工具使用磁性巴克豪森噪声

    公开(公告)号：US08035374B1

    公开(公告)日：2011-10-11

    申请号：US12245054

    申请日：2008-10-03

    申请人： Bruce I. Girrell ,  Thomas A. Johnson ,  Ameet V. Joshi ,  Douglas A. Spencer

    发明人： Bruce I. Girrell ,  Thomas A. Johnson ,  Ameet V. Joshi ,  Douglas A. Spencer

    IPC分类号： G01V3/00

    CPC分类号： E21B47/0905

    摘要： A tool disposable within a well pipe, such as for detecting a freepoint of a well pipe, includes an electromagnet capable of inducing a magnetic field within a wall of a well pipe. The tool includes a Barkhausen noise sensing device capable of sensing magnetic Barkhausen noise in response to the electromagnet inducing the magnetic field within the wall of the well pipe. The tool may be moved along the well pipe so as make two passes of the tool along the well pipe, with one pass being performed while the well pipe is less stressed and the other pass being performed while the well pipe is more stressed, with the output of the tool during a first pass being compared to the output of the tool during a second pass to determine the location of the freepoint of the well pipe.

    摘要翻译： 在井管内一次性使用的工具，例如用于检测井管的自由点，包括能够在井管壁内引起磁场的电磁体。 该工具包括一个能够感应磁性Barkhausen噪声的Barkhausen噪声检测装置，以响应于电磁体引起井管壁内的磁场。 工具可以沿着井管移动，以便沿着井管进行两次工具，同时在井管受力较小的同时进行一次通过，而在井管更受应力的情况下执行另一道次，其中 在第二次通过期间将工具的输出与工具的输出进行比较以确定井管的自由点的位置。