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    System and Method for Measuring Borehole Geometry While Drilling
    1.
    发明申请
    System and Method for Measuring Borehole Geometry While Drilling 有权
    钻孔时测量钻孔几何的系统和方法

    公开(公告)号：US20130106413A1

    公开(公告)日：2013-05-02

    申请号：US13287877

    申请日：2011-11-02

    申请人： Tim Hopper ,  Nicholas J. Heaton ,  David T. Oliver ,  Luis E. Depavia ,  Yi-Qiao Song ,  Martin D. Hurlimann

    发明人： Tim Hopper ,  Nicholas J. Heaton ,  David T. Oliver ,  Luis E. Depavia ,  Yi-Qiao Song ,  Martin D. Hurlimann

    IPC分类号： G01V3/32

    CPC分类号： E21B47/082

    摘要： A method and system for determining a geometry of a borehole includes forming an nuclear magnetic resonance (NMR) caliper with a plurality of coils and coupling the NMR caliper to a borehole assembly. The NMR caliper may be calibrated for porosity and the T2 of the drilling mud, prior to drilling, at the surface. After drilling commences, scans of the borehole may be conducted with each coil of the NMR caliper. Each scan may include propagating RF energy across a range of frequencies with each coil in order to excite a NMR signal at varying depths. Borehole wall distances from the NMR caliper may be determined by reviewing a plurality of T2 distributions from CPMG measurements derived from the scans. In some embodiments, borehole wall distances from the NMR caliper may be determined by reviewing porosity values derived from the scans.

    摘要翻译： 用于确定钻孔几何形状的方法和系统包括用多个线圈形成核磁共振（NMR）卡尺并将NMR卡尺耦合到钻孔组件。 可以在钻井前在表面校准NMR厚度测量孔隙度和钻井泥浆的T2。 钻孔开始后，钻孔的扫描可以用NMR卡尺的每个线圈进行。 每个扫描可以包括在每个线圈的频率范围内传播RF能量，以便在不同的深度激发NMR信号。 可以通过从扫描导出的CPMG测量中查看多个T2分布来确定来自NMR厚度的孔壁距离。 在一些实施例中，可以通过检查从扫描导出的孔隙度值来确定来自NMR厚度的钻孔壁距离。

    Nuclear magnetic resonance tool with movable magnets
    2.
    发明授权
    Nuclear magnetic resonance tool with movable magnets 有权
    具有可动磁铁的核磁共振工具

    公开(公告)号：US08860413B2

    公开(公告)日：2014-10-14

    申请号：US13288508

    申请日：2011-11-03

    申请人： Tim Hopper ,  Luis E. Depavia ,  Yi-Qiao Song ,  David T. Oliver

    发明人： Tim Hopper ,  Luis E. Depavia ,  Yi-Qiao Song ,  David T. Oliver

    IPC分类号： G01V3/00 ,  G01R33/38 ,  G01V3/32

    CPC分类号： G01V3/32 ,  E21B47/00 ,  G01R33/3808

    摘要： Methods and systems are provided that enable logging while drilling NMR measurements to be made with a tool having magnets with positions adjustable or movable relative to each other. Such movement can affect the depth of investigation of the NMR tool. A variety of moving assemblies can be used to effectuate the movement, which can be performed either at the surface or downhole. The tool also can include a magnetically permeable member to control the magnetic field gradient.

    摘要翻译： 提供的方法和系统能够在钻探NMR测量时进行测井，该测量可以用具有相对于彼此可调节或可移动位置的磁体的工具进行。 这种运动可以影响NMR工具的研究深度。 可以使用各种移动组件来实现可在表面或井下进行的运动。 该工具还可以包括用于控制磁场梯度的导磁构件。

    System and method for measuring borehole geometry while drilling
    3.
    发明授权
    System and method for measuring borehole geometry while drilling 有权
    钻孔时测量钻孔几何的系统和方法

    公开(公告)号：US08941383B2

    公开(公告)日：2015-01-27

    申请号：US13287877

    申请日：2011-11-02

    申请人： Tim Hopper ,  Nicholas J. Heaton ,  David T. Oliver ,  Luis E. Depavia ,  Yi-Qiao Song ,  Martin D. Hurlimann

    发明人： Tim Hopper ,  Nicholas J. Heaton ,  David T. Oliver ,  Luis E. Depavia ,  Yi-Qiao Song ,  Martin D. Hurlimann

    IPC分类号： G01V3/00 ,  E21B47/08

    CPC分类号： E21B47/082

    摘要： A method and system for determining a geometry of a borehole includes forming an nuclear magnetic resonance (NMR) caliper with a plurality of coils and coupling the NMR caliper to a borehole assembly. The NMR caliper may be calibrated for porosity and the T2 of the drilling mud, prior to drilling, at the surface. After drilling commences, scans of the borehole may be conducted with each coil of the NMR caliper. Each scan may include propagating RF energy across a range of frequencies with each coil in order to excite a NMR signal at varying depths. Borehole wall distances from the NMR caliper may be determined by reviewing a plurality of T2 distributions from CPMG measurements derived from the scans. In some embodiments, borehole wall distances from the NMR caliper may be determined by reviewing porosity values derived from the scans.

    摘要翻译： 用于确定钻孔几何形状的方法和系统包括用多个线圈形成核磁共振（NMR）卡尺并将NMR卡尺耦合到钻孔组件。 可以在钻井前在表面校准NMR厚度测量孔隙度和钻井泥浆的T2。 钻孔开始后，钻孔的扫描可以用NMR卡尺的每个线圈进行。 每个扫描可以包括在每个线圈的频率范围内传播RF能量，以便在不同的深度激发NMR信号。 可以通过从扫描导出的CPMG测量中查看多个T2分布来确定来自NMR厚度的孔壁距离。 在一些实施例中，可以通过检查从扫描导出的孔隙度值来确定来自NMR厚度的钻孔壁距离。

    Nuclear Magnetic Resonance Tool With Movable Magnets
    4.
    发明申请
    Nuclear Magnetic Resonance Tool With Movable Magnets 有权
    具有可移动磁铁的核磁共振工具

    公开(公告)号：US20120126809A1

    公开(公告)日：2012-05-24

    申请号：US13288508

    申请日：2011-11-03

    申请人： Tim Hopper ,  Luis E. Depavia ,  Yi-Qiao Song ,  David T. Oliver

    发明人： Tim Hopper ,  Luis E. Depavia ,  Yi-Qiao Song ,  David T. Oliver

    IPC分类号： G01V3/32 ,  G01R33/44

    CPC分类号： G01V3/32 ,  E21B47/00 ,  G01R33/3808

    摘要： Methods and systems are provided that enable logging while drilling NMR measurements to be made with a tool having magnets with positions adjustable or movable relative to each other. Such movement can affect the depth of investigation of the NMR tool. A variety of moving assemblies can be used to effectuate the movement, which can be performed either at the surface or downhole. The tool also can include a magnetically permeable member to control the magnetic field gradient.

    摘要翻译： 提供的方法和系统能够在钻探NMR测量时进行测井，该测量可以用具有相对于彼此可调节或可移动位置的磁体的工具进行。 这种运动可以影响NMR工具的研究深度。 可以使用各种移动组件来实现可在表面或井下进行的运动。 该工具还可以包括用于控制磁场梯度的导磁构件。

    DETECTING A STRUCTURE IN A WELL
    6.
    发明申请
    DETECTING A STRUCTURE IN A WELL 审中-公开
    检测一个好的结构

    公开(公告)号：US20110204896A1

    公开(公告)日：2011-08-25

    申请号：US12996524

    申请日：2009-06-10

    申请人： Hong Zhang ,  Luis E. Depavia

    发明人： Hong Zhang ,  Luis E. Depavia

    IPC分类号： G01V3/28 ,  E21B47/09

    CPC分类号： E21B47/0905 ,  G01V3/28

    摘要： A tool for detecting a structure in a well includes a receiver coil having a first winding and a second winding, a first circuit to apply an input signal to the second winding, and a detection circuit to detect a response of the first winding to the input signal applied to the second winding. The response of the first winding indicates presence of the structure in the well if the receiver coil is positioned proximate the structure. The depths (or locations) of these structures are used to avoid placing receivers near these structures for EM induction surveys, such as cross-well, surface-to-wellbore, or single-wellbore induction loggings with receivers in metallic casing.

    摘要翻译： 用于检测井中的结构的工具包括具有第一绕组和第二绕组的接收器线圈，将输入信号施加到第二绕组的第一电路以及用于检测第一绕组对输入端的响应的检测电路 信号施加到第二绕组。 如果接收器线圈靠近结构定位，则第一绕组的响应指示井中存在结构。 这些结构的深度（或位置）用于避免将接收器放置在这些结构附近用于EM感应测量，例如在金属外壳中具有接收器的交叉井，井对井眼或单井眼感应测井。