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    Optical fluid analysis signal refinement
    3.
    发明授权
    Optical fluid analysis signal refinement 有权
    光学流体分析信号精细化

    公开(公告)号：US06992768B2

    公开(公告)日：2006-01-31

    申请号：US10249968

    申请日：2003-05-22

    申请人： Chengli Dong ,  Peter S. Hegeman ,  Oliver C. Mullins ,  Kai Hsu ,  Andrew L. Kurkjian ,  Andrew J. Carnegie

    发明人： Chengli Dong ,  Peter S. Hegeman ,  Oliver C. Mullins ,  Kai Hsu ,  Andrew L. Kurkjian ,  Andrew J. Carnegie

    IPC分类号： G01J3/46

    CPC分类号： E21B49/10 ,  G01N21/31 ,  G01N2021/3129

    摘要： A method for refining fluid sample data includes obtaining optical density data for a fluid sample in at least two color channels and at least one fluid component channel and determining a color-absorption function from the optical density data for the fluid sample in the at least two color channels. The method also includes calculating a portion of the optical density caused by color absorptions in each of the at least one fluid component channels, and de-coloring the optical density data in each of the at least one fluid component channels by removing the portion of the optical density data caused by color absorption.

    摘要翻译： 用于精炼流体样本数据的方法包括：获得至少两个颜色通道中的流体样本的光密度数据和至少一个流体分量通道，并根据来自至少两个中的流体样本的光密度数据确定颜色吸收函数 颜色通道。 所述方法还包括计算由所述至少一个流体分量通道中的每一个中的颜色吸收引起的光密度的一部分，以及通过去除所述至少一个流体分量通道中的每一个的所述至少一个流体分量通道中的所述光密度数据 由颜色吸收引起的光密度数据。

    FLUID DENSITY FROM DOWNHOLE OPTICAL MEASUREMENTS
    6.
    发明申请
    FLUID DENSITY FROM DOWNHOLE OPTICAL MEASUREMENTS 有权
    流体密度来自卧室光学测量

    公开(公告)号：US20110042070A1

    公开(公告)日：2011-02-24

    申请号：US12543017

    申请日：2009-08-18

    申请人： Kai Hsu ,  Kentaro Indo ,  Oliver C. Mullins ,  Peter S. Hegeman

    发明人： Kai Hsu ,  Kentaro Indo ,  Oliver C. Mullins ,  Peter S. Hegeman

    IPC分类号： E21B49/08 ,  E21B47/00 ,  G06F19/00

    CPC分类号： E21B49/087 ,  E21B47/102 ,  E21B49/08 ,  E21B2049/085

    摘要： A system and method for determining at least one fluid characteristic of a downhole fluid sample using a downhole tool are provided. In one example, the method includes performing a calibration process that correlates optical and density sensor measurements of a fluid sample in a downhole tool at a plurality of pressures. The calibration process is performed while the fluid sample is not being agitated. At least one unknown value of a density calculation is determined based on the correlated optical sensor measurements and density sensor measurements. A second optical sensor measurement of the fluid sample is obtained while the fluid sample is being agitated. A density of the fluid sample is calculated based on the second optical sensor measurement and the at least one unknown value.

    摘要翻译： 提供了一种用于使用井下工具确定井下流体样品的至少一种流体特性的系统和方法。 在一个示例中，该方法包括执行校准过程，其将多个压力下的井下工具中的流体样品的光学和密度传感器测量值相关联。 校准过程在流体样品未被搅动时进行。 基于相关的光学传感器测量和密度传感器测量确定密度计算的至少一个未知值。 在流体样品被搅动的同时获得液体样品的第二光学传感器测量。 基于第二光学传感器测量和至少一个未知值计算流体样本的密度。

    Methods and apparatus to detect contaminants on a fluid sensor
    10.
    发明授权
    Methods and apparatus to detect contaminants on a fluid sensor 有权
    检测流体传感器污染物的方法和设备

    公开(公告)号：US08717549B2

    公开(公告)日：2014-05-06

    申请号：US12133787

    申请日：2008-06-05

    申请人： Chengli Dong ,  Peter S. Hegeman

    发明人： Chengli Dong ,  Peter S. Hegeman

    IPC分类号： G01N21/00

    CPC分类号： G01N21/27 ,  E21B49/10 ,  G01N21/31 ,  G01N21/85 ,  G01N2021/6493 ,  G01N2021/8427

    摘要： Methods and apparatus for detecting a coating on a downhole fluid sensor are disclosed. A coating may refer to a solid or liquid film on a sensor interface with the sampled fluid, caused by contaminants. Detecting a coating may be accomplished by determining a sampled fluid type and measuring at least one fluid parameter using one or more downhole fluid sensors. The coating detection further includes determining whether the measured parameters are within ranges corresponding to the determined fluid type. Additionally or alternatively, measured parameter values that remain substantially stable during sampled fluid pumping may also indicate a coated sensor.

    摘要翻译： 公开了用于检测井下流体传感器上的涂层的方法和装置。 涂层可以指由与污染物引起的采样流体的传感器界面上的固体或液体膜。 可以通过确定采样的流体类型并使用一个或多个井下流体传感器测量至少一个流体参数来实现检测涂层。 涂层检测还包括确定所测量的参数是否在与所确定的流体类型相对应的范围内。 另外或替代地，在采样流体泵送期间保持基本稳定的测量参数值也可以指示涂覆的传感器。