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    Determining dew precipitation and onset pressure in oilfield retrograde condensate
    6.
    发明授权
    Determining dew precipitation and onset pressure in oilfield retrograde condensate 有权
    确定油田逆行冷凝水中的露水沉淀和起始压力

    公开(公告)号：US07002142B2

    公开(公告)日：2006-02-21

    申请号：US10309850

    申请日：2002-12-03

    申请人： Oliver C. Mullins ,  Go Fujisawa ,  Chengli Dong ,  Andrew Kurkjian ,  John Nighswander ,  Toru Terabayashi ,  Satoko Yoshida ,  Hideki Kinjo ,  Henning Groenzin

    发明人： Oliver C. Mullins ,  Go Fujisawa ,  Chengli Dong ,  Andrew Kurkjian ,  John Nighswander ,  Toru Terabayashi ,  Satoko Yoshida ,  Hideki Kinjo ,  Henning Groenzin

    IPC分类号： G01V8/00

    CPC分类号： E21B49/084 ,  E21B47/1015 ,  E21B49/005 ,  E21B49/10 ,  G01N21/64 ,  G01N33/241 ,  G01N33/2823

    摘要： A method and apparatus detects dew precipitation and determines dew precipitation onset pressure in a sample of formation fluid located downhole in an oilfield reservoir. In a preferred embodiment, the method includes (a) isolating a sample of formation fluid downhole; (b) illuminating the sample downhole with fluorescence excitation light; (c) measuring at least one characteristic of fluorescence short from the sample; (d) reducing pressure on the sample; (e) repeating steps (b) to (d); (f) detecting dew precipitation when a change is detected in a parameter that is a function of the at least one characteristic of fluorescence emission; and (g) setting dew precipitation onset pressure equal to pressure on the sample when the change in the parameter is detected. The parameter preferably is a function of fluorescence intensity and fluorescence red shift, and the change is an increase in fluorescence intensity and detection of fluorescence red shift. Also, the function includes a ratio of a measured intensity at a first wavelength to a reference intensity, and the reference intensity is a function of a measured intensity at a second wavelength.

    摘要翻译： 方法和装置检测露点沉淀，并确定位于油田储层中井下的地层流体样品中的露水沉淀开始压力。 在一个优选实施例中，该方法包括（a）在井下分离地层流体样品; （b）用荧光激发光照射井下样品; （c）从所述样品测量至少一种荧光短的特征; （d）降低样品压力; （e）重复步骤（b）至（d）; （f）当在作为荧光发射的至少一个特征的函数的参数中检测到变化时，检测露水沉淀; 和（g）当检测到参数变化时，将露珠沉淀开始压力设定为等于样品上的压力。 该参数优选是荧光强度和荧光红移的函数，并且荧光强度的变化和荧光红移的检测变化。 此外，该功能包括第一波长处的测量强度与参考强度的比率，并且参考强度是第二波长处的测量强度的函数。

    Circulation pump for circulating downhole fluids, and characterization apparatus of downhole fluids
    7.
    发明授权
    Circulation pump for circulating downhole fluids, and characterization apparatus of downhole fluids 失效
    井下流体循环泵，井下流体表征装置

    公开(公告)号：US07707878B2

    公开(公告)日：2010-05-04

    申请号：US11858138

    申请日：2007-09-20

    申请人： Kazumasa Kanayama ,  Ryuki Odashima ,  Shunetsu Onodera ,  Hitoshi Sugiyama ,  Hideki Kinjo

    发明人： Kazumasa Kanayama ,  Ryuki Odashima ,  Shunetsu Onodera ,  Hitoshi Sugiyama ,  Hideki Kinjo

    IPC分类号： E21B47/08

    CPC分类号： F04D13/10 ,  E21B49/082 ,  F04D3/00 ,  F04D13/024

    摘要： A circulation pump for circulating downhole fluids is provided. The circulation pump includes a cylindrical pump housing, a shaft secured in the pump housing extending in a longitudinal direction thereof, an impeller rotating around the shaft in the pump housing, a cylindrical magnetic coupler rotating around the pump housing, the cylindrical magnetic coupler including a magnet, and a motor positioned outside of the pump housing and connected to the magnetic coupler to rotate the magnetic coupler around the pump housing. The impeller is provided with a magnetic piece, which is capable of being magnetically connected with the magnet of the cylindrical magnetic coupler to cause the impeller to rotate around the shaft by rotating the cylindrical magnetic coupler around the pump housing.

    摘要翻译： 提供一种用于循环井下流体的循环泵。 循环泵包括圆柱​​形泵壳体，固定在沿其纵向方向延伸的泵壳体中的轴，围绕泵壳体中的轴旋转的叶轮，围绕泵壳体旋转的圆柱形磁性耦合器，该圆柱形磁性耦合器包括： 磁体和位于泵壳体外部并连接到磁耦合器的马达，以使磁耦合器围绕泵壳体旋转。 叶轮设置有磁性件，该磁性件能够与圆柱形磁性耦合器的磁体磁连接，以通过使圆柱形磁性耦合器围绕泵壳体旋转来使叶轮绕轴旋转。