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    • 7. 发明申请
    • SYSTEM AND METHOD FOR UNIFORM AND LOCALIZED WALL THICKNESS MEASUREMENT USING FIBER OPTIC SENSORS
    • 使用光纤传感器进行均匀化和局部化厚度测量的系统和方法
    • US20120099097A1
    • 2012-04-26
    • US13256633
    • 2010-03-18
    • Peter CoupeDamon Richard RobertsDmitry BelovEvgeniya Myalo DegerMasafumi FukuharaYamid PicoRogerio Tadeu RamosIan Peirce
    • Peter CoupeDamon Richard RobertsDmitry BelovEvgeniya Myalo DegerMasafumi FukuharaYamid PicoRogerio Tadeu RamosIan Peirce
    • G01B11/16
    • G01B11/06G01B11/18G01B21/045G01D3/0365G01D5/35383G01L9/0032
    • A system and method are provided for determining wall thickness of a structure such as a metallic pressurized pipe. The system includes an optical fiber having a plurality of Fiber Bragg Gratings (FBGs), and a mounting for securing the FBGs over discrete portions of the exterior surface of the pipe such that strain in the pressurized pipe wall is transmitted to the FBGs. The system further includes a light source and a light sensor coupled to an end of the optical fiber. The light sensor converts light reflected back from the FBGs into electrical signals that a digital processor converts into strain measurements. The FBGs are mounted around portions of the pipe expected to have significant metal loss as well as portions of the pipe expected to have negligible metal loss. The method includes at least one of comparing relative strains at locations with negligible metal loss to those with significant metal loss to accurately determine the thickness of the wall with metal loss; compensating for temperature effects by considering relative strains at areas of the pipe with and without metal loss; and measuring axial strain on the pipe with one or more of the FBGs to correct for at least one of bending and torsion effects on hoop strain.
    • 提供了一种用于确定诸如金属加压管的结构的壁厚的系统和方法。 该系统包括具有多个光纤布拉格光栅(FBG)的光纤,以及用于将FBG固定在管的外表面的离散部分上的安装件,使得加压管壁中的应变传递到FBG。 该系统还包括耦合到光纤端部的光源和光传感器。 光传感器将从FBG反射回来的光转换为数字处理器转换为应变测量的电信号。 FBG安装在预期具有显着金属损失的管道周围,并且管道的部分预期具有可忽略的金属损失。 该方法包括将具有可忽略的金属损失的位置处的相对应变与具有显着金属损失的位置进行比较中的至少一个,以精确地确定具有金属损失的壁的厚度; 通过考虑在具有和不具有金属损失的管道的区域处的相对应变来补偿温度影响; 并用一个或多个FBG测量管道上的轴向应变,以校正环箍应变的弯曲和扭转效应中的至少一种。
    • 9. 发明申请
    • MEASURING PROBE FOR OIL AND GAS WELLS AND/OR CASINGS
    • 测量油气井和/或箱的探测器
    • US20110132082A1
    • 2011-06-09
    • US12947276
    • 2010-11-16
    • Yamid PicoMasafumi FukuharaClement Kostov
    • Yamid PicoMasafumi FukuharaClement Kostov
    • G01N23/00E21B49/00G01V3/17G01V5/04
    • G01V11/005
    • This invention relates to well logging instrumentation, specifically, to measuring devices which use an advanced slip-free borehole contact interaction mechanism. A measuring probe for an oil and gas wells and/or casings includes a main body and at least one robotic arm, fixed to the main body and provided with a polygonal rotating contact tip at the arm's free end. The measuring probe is used as a measuring device and provides a successive slip-free continuous contact between the rotating surface of the tip and the inner wall of the oil & gas wells and/or casings. The tip is furnished with at least one sensor that picks up the geological formations response to a signal emitted directly to the geological formation via the points of contact.
    • 本发明涉及测井仪器,具体涉及使用先进的无滑动钻孔接触相互作用机构的测量装置。 用于油气井和/或壳体的测量探针包括主体和至少一个机械手臂,固定到主体并且在臂的自由端处设置有多边形旋转的接触尖端。 测量探头用作测量装置,并且在尖端的旋转表面和油气井和/或壳体的内壁之间提供连续无滑动的连续接触。 尖端配备有至少一个传感器,其拾取通过接触点直接发射到地质层的信号的地质构造响应。
    • 10. 发明授权
    • Nuclear magnetic resonance pulse sequences for use with borehole logging
tools
    • 用于井眼测井工具的核磁共振脉冲序列
    • US5023551A
    • 1991-06-11
    • US452903
    • 1989-12-19
    • Robert L. KleinbergAbdurrahman SezginerMasafumi Fukuhara
    • Robert L. KleinbergAbdurrahman SezginerMasafumi Fukuhara
    • G01R33/34G01R33/38G01R33/44G01V3/32
    • G01V3/32G01N24/081G01R33/341G01R33/3808G01R33/3671G01R33/443G01R33/448
    • An NMR pulse sequence for use in the borehole environment is provided which combines a modified fast inversion recovery (FIR) pulse sequence with a series of more than ten, and typically hundreds, of CPMG pulses according to[W.sub.i -180-.tau..sub.i -90-(t.sub.cp -180-t.sub.cp -echo).sub.j ].sub.iwhere j is the index of the CPMG echoes gathered, i is the index of the wait times in the pulse sequence, W.sub.i are the wait times, i are the recovery times before the CPMG pulses, and tcp is the Carr-Purcell spacing. Measurements are made of the signals induced in the formation as a result of the magnetic fields. Determinations of M.sub.o and/or T1 are then made from the measurements according to relationships which relate Mp.sub.o, T1 and T2 to the signal magnitude. Other relationships which provide stretched exponentials or multiple exponentials can also be used. From the M.sub.o and/or T1 determinations, formation parameters such as porosity and permeability may be derived according to equations known in the art. In obtaining the most accurate determinations of formation parameters in the least amount of time, the various pulse sequence parameters (I, J, W.sub.i, and .tau..sub.i) are optimized prior to logging. Additional accuracy is obtained by integrating a gated portion of the echoes rather than by measuring amplitude, and by utilizing a phase alternated CPMG sequence in repetitive measurements in order to eliminate baseline shift error.
    • 提供了一种用于井眼环境中的NMR脉冲序列,其将经修改的快速反转恢复(FIR)脉冲序列与根据[Wi-180-τi-90的几十个并且通常为数百个CPMG脉冲 - (tcp-180-tcp-echo)j] i其中j是收集的CPMG回波的索引,i是脉冲序列中的等待时间的索引,Wi是等待时间,i是之前的恢复时间 CPMG脉冲,tcp是Carr-Purcell间隔。 测量由于磁场而在地层中感应的信号。 然后根据将Mpo,T1和T2与信号幅度相关的关系从测量值确定Mo和/或T1。 也可以使用提供拉伸指数或多指数的其他关系。 根据Mo和/或T1测定,可以根据本领域已知的方程式导出诸如孔隙率和渗透率的形成参数。 在最少量的时间内获得最准确的地层参数确定时,各种脉冲序列参数(I,J,Wi和τi)在记录之前被优化。 通过集成回波的门控部分而不是通过测量振幅,并且通过在重复测量中利用相位交替的CPMG序列来获得额外的精度,以消除基线偏移误差。