Methods and apparatus for analyzing a downhole fluid
    1.
    发明授权
    Methods and apparatus for analyzing a downhole fluid 有权
    用于分析井下流体的方法和装置

    公开(公告)号:US08136394B2

    公开(公告)日:2012-03-20

    申请号:US12425912

    申请日:2009-04-17

    IPC分类号: E21B49/10

    CPC分类号: E21B49/088 G01N33/2823

    摘要: Methods and apparatuses for analyzing a downhole fluid are disclosed. An example method may involve the steps of admitting the downhole fluid in a test volume, controllably inducing a pressure change in the test volume based on at least one prescribed rate, measuring pressures in the test volume at a plurality of times, using the pressures measured at the plurality of times to determine a time at which an actual rate of the pressure change in the test volume deviates from the at least one prescribed rate, and detecting an occurrence of phase transition of the downhole fluid based on the determined time.

    摘要翻译: 公开了用于分析井下流体的方法和装置。 示例性方法可以包括以下步骤:允许在测试体积中允许井下流体,基于至少一个规定的速率可控地引起测试体积中的压力变化,使用测量的压力测量多次测试体积中的压力 以确定试验体积中的压力变化的实际速率偏离所述至少一个规定速率的时间,并且基于所确定的时间来检测所述井下流体的相变的发生。

    METHODS AND APPARATUS FOR ANALYZING A DOWNHOLE FLUID
    2.
    发明申请
    METHODS AND APPARATUS FOR ANALYZING A DOWNHOLE FLUID 有权
    用于分析井底流体的方法和装置

    公开(公告)号:US20100263442A1

    公开(公告)日:2010-10-21

    申请号:US12425912

    申请日:2009-04-17

    IPC分类号: E21B47/08

    CPC分类号: E21B49/088 G01N33/2823

    摘要: Methods and apparatuses for analyzing a downhole fluid are disclosed. An example method may involve the steps of admitting the downhole fluid in a test volume, controllably inducing a pressure change in the test volume based on at least one prescribed rate, measuring pressures in the test volume at a plurality of times, using the pressures measured at the plurality of times to determine a time at which an actual rate of the pressure change in the test volume deviates from the at least one prescribed rate, and detecting an occurrence of phase transition of the downhole fluid based on the determined time.

    摘要翻译: 公开了用于分析井下流体的方法和装置。 示例性方法可以包括以下步骤:允许在测试体积中允许井下流体,基于至少一个规定的速率可控地引起测试体积中的压力变化,使用测量的压力测量多次测试体积中的压力 以确定试验体积中的压力变化的实际速率偏离所述至少一个规定速率的时间,并且基于所确定的时间来检测所述井下流体的相变的发生。

    Vibrating wire viscometers
    3.
    发明授权
    Vibrating wire viscometers 有权
    振动丝粘度计

    公开(公告)号:US08166812B2

    公开(公告)日:2012-05-01

    申请号:US12578587

    申请日:2009-10-14

    IPC分类号: E21B49/08 G01N11/10 G01N29/00

    CPC分类号: G01N11/16 E21B2049/085

    摘要: Vibrating wire viscometers are disclosed. An example apparatus to determine the viscosity of a downhole fluid is described, the apparatus including a wire to be immersed in a downhole fluid, to vibrate when an alternating current is applied to the wire within a magnetic field, and to generate an electromotive force when vibrating within the magnetic field, the wire comprising a first resistance. The apparatus further includes a nulling circuit coupled to the wire, wherein the nulling circuit comprises a second resistance that is selectable to be substantially equal to the first resistance, and an analyzer coupled to the wire and the nulling circuit to determine the first resistance, the second resistance, and a viscosity of the downhole fluid based on the first and second resistances, at least one characteristic of the wire, and the electromotive force.

    摘要翻译: 公开了振动丝粘度计。 描述了一种用于确定井下流体的粘度的示例性装置,该装置包括要浸入井下流体中的线,以在交变电流施加到磁场内的线时振动,并产生电动势, 在磁场内振动,线包括第一电阻。 所述装置还包括耦合到所述导线的归零电路,其中所述归零电路包括可选择为基本上等于所述第一电阻的第二电阻,以及耦合到所述导线和所述归零电路以确定所述第一电阻的分析器, 第二阻力和基于第一和第二电阻的井下流体的粘度,线的至少一个特性和电动势。

    ELECTRONIC APPARATUS OF A DOWNHOLE TOOL
    4.
    发明申请
    ELECTRONIC APPARATUS OF A DOWNHOLE TOOL 审中-公开
    电动工具的电子设备

    公开(公告)号:US20120093193A1

    公开(公告)日:2012-04-19

    申请号:US13263073

    申请日:2010-04-28

    IPC分类号: G01K13/00

    CPC分类号: E21B47/011

    摘要: An electronic apparatus (12) of a downhole tool (9, 11) comprises a first electronic device (13) operating up to a first maximum operating temperature, a second electronic device (14) operating up to a second maximum operating temperature, a switch (15) coupling the first electronic device (13) to the second electronic device (14), the second electronic device (14) providing electrical power to the first electronic device (13). The second maximum operating temperature is higher than the first maximum operating temperature. The switch (15) is a thermally controlled switch such that the switch is only closed when a measured temperature of the first electronic device is lower than the first maximum operating temperature.

    摘要翻译: 井下工具(9,11)的电子设备(12)包括操作到第一最高工作温度的第一电子设备(13),第二最大工作温度下运行的第二电子设备(14),开关 (15)将所述第一电子设备(13)耦合到所述第二电子设备(14),所述第二电子设备(14)向所述第一电子设备(13)提供电力。 第二最高工作温度高于第一最高工作温度。 开关(15)是热控制开关,使得开关仅在第一电子装置的测量温度低于第一最高工作温度时闭合。

    Downhole tool
    5.
    发明授权
    Downhole tool 有权
    井下工具

    公开(公告)号:US07793712B2

    公开(公告)日:2010-09-14

    申请号:US11844339

    申请日:2007-08-23

    CPC分类号: E21B47/00

    摘要: A downhole tool, configured to be suspended in a borehole traversing an earth formation, includes a downhole data acquisition system placed in the tool body and electrically connected to an electric power generator at the formation surface. The downhole data acquisition system includes a sensor for detecting local conditions in the borehole, and a transducer for transducing the voltage of an input signal from high to low or low to high. The transducer having a gallium nitride or silicon carbide based discrete semiconductor device.

    摘要翻译: 构造成悬挂在穿过地层的钻孔中的井下工具包括放置在工具主体中并与形成表面处的发电机电连接的井下数据采集系统。 井下数据采集系统包括用于检测钻孔中的局部状况的传感器,以及用于将输入信号的电压从高到低转换为高的换能器。 换能器具有基于氮化镓或碳化硅的分立半导体器件。

    DOWNHOLE TOOL
    6.
    发明申请
    DOWNHOLE TOOL 有权
    卧式工具

    公开(公告)号:US20080047751A1

    公开(公告)日:2008-02-28

    申请号:US11844339

    申请日:2007-08-23

    IPC分类号: E21B49/00

    CPC分类号: E21B47/00

    摘要: A downhole tool, configured to be suspended in a borehole traversing an earth formation, includes a downhole data acquisition system placed in the tool body and electrically connected to an electric power generator at the formation surface. The downhole data acquisition system includes a sensor for detecting local conditions in the borehole, and a transducer for transducing the voltage of an input signal from high to low or low to high. The transducer having a gallium nitride or silicon carbide based discrete semiconductor device.

    摘要翻译: 构造成悬挂在穿过地层的钻孔中的井下工具包括放置在工具主体中并与形成表面处的发电机电连接的井下数据采集系统。 井下数据采集系统包括用于检测钻孔中的局部状况的传感器,以及用于将输入信号的电压从高到低转换为高的换能器。 换能器具有基于氮化镓或碳化硅的分立半导体器件。

    Methods and apparatus to evaluate subterranean formations
    7.
    发明授权
    Methods and apparatus to evaluate subterranean formations 有权
    评估地下地层的方法和装置

    公开(公告)号:US08156800B2

    公开(公告)日:2012-04-17

    申请号:US12343477

    申请日:2008-12-24

    IPC分类号: E21B49/08

    CPC分类号: E21B49/10 E21B47/10

    摘要: Methods and apparatus to evaluate subterranean formations are described. An example method of evaluating a subterranean formation includes, obtaining a first sample from a first wellbore location. Additionally, the example method includes obtaining a second sample from a second wellbore location different than the first wellbore location. Further, the example method includes mixing the first sample with the second sample in a flowline to obtain a substantially homogenous mixture. Further still, the example method includes measuring a parameter of the mixture to evaluate the subterranean formation.

    摘要翻译: 描述了评估地下地层的方法和装置。 评估地下地层的示例性方法包括从第一井眼位置获得第一样本。 另外,示例性方法包括从不同于第一井筒位置的第二井筒位置获得第二样本。 此外,示例性方法包括将第一样品与流线中的第二样品混合以获得基本均匀的混合物。 此外,示例性方法包括测量混合物的参数以评估地下地层。