Demagnetizer to Eliminate Residual Magnetization Produced by Nuclear Magnetic Resonance Logs
    1.
    发明申请
    Demagnetizer to Eliminate Residual Magnetization Produced by Nuclear Magnetic Resonance Logs 失效
    消磁器消除核磁共振记录产生的残余磁化

    公开(公告)号:US20090015254A1

    公开(公告)日:2009-01-15

    申请号:US12197793

    申请日:2008-08-25

    IPC分类号: G01V3/32

    CPC分类号: E21B47/00 G01V3/32 H01F13/006

    摘要: An apparatus and method is disclosed for measuring a parameter of an earth formation surrounding a wellbore. A Nuclear Magnetic Resonance (NMR) tool and at least one second tool are conveyed in the wellbore on a wireline, the NMR tool having a magnetic influence on a region of the wellbore. The magnetic influence of the NMR tool is removed from the region of the wellbore using a demagnetizing device. The parameter of the earth formation is measured using the at least one second tool. A second demagnetizing device may be used to remove the magnetic influence of the at least one second tool from the region of the wellbore.

    摘要翻译: 公开了一种用于测量围绕井筒的地层的参数的装置和方法。 核磁共振(NMR)工具和至少一个第二工具在井筒中在电缆上传送,NMR工具对井眼的区域具有磁性影响。 使用消磁装置从井筒的区域去除NMR工具的磁影响。 使用至少一个第二工具测量地层的参数。 可以使用第二去磁装置来从井筒的区域去除至少一个第二工具的磁影响。

    Demagnetizer to eliminate residual magnetization of wellbore wall produced by nuclear magnetic resonance logs
    2.
    发明授权
    Demagnetizer to eliminate residual magnetization of wellbore wall produced by nuclear magnetic resonance logs 失效
    消磁器消除由核磁共振测井仪产生的井筒壁的残余磁化

    公开(公告)号:US07969150B2

    公开(公告)日:2011-06-28

    申请号:US12197793

    申请日:2008-08-25

    IPC分类号: G01V3/00 G01V3/18

    CPC分类号: E21B47/00 G01V3/32 H01F13/006

    摘要: An apparatus and method is disclosed for measuring a parameter of an earth formation surrounding a wellbore. A Nuclear Magnetic Resonance (NMR) tool and at least one second tool are conveyed in the wellbore on a wireline, the NMR tool having a magnetic influence on a region of the wellbore. The magnetic influence of the NMR tool is removed from the region of the wellbore using a demagnetizing device. The parameter of the earth formation is measured using the at least one second tool. A second demagnetizing device may be used to remove the magnetic influence of the at least one second tool from the region of the wellbore.

    摘要翻译: 公开了一种用于测量围绕井筒的地层的参数的装置和方法。 核磁共振(NMR)工具和至少一个第二工具在井筒中在电缆上传送,NMR工具对井眼的区域具有磁性影响。 使用消磁装置从井筒的区域去除NMR工具的磁影响。 使用至少一个第二工具测量地层的参数。 可以使用第二去磁装置来从井筒的区域去除至少一个第二工具的磁影响。

    EROSION PREDICTION FOR DOWNHOLE TOOLS

    公开(公告)号:US20230012069A1

    公开(公告)日:2023-01-12

    申请号:US17858131

    申请日:2022-07-06

    IPC分类号: E21B12/02 E21B41/00 E21B47/13

    摘要: Downhole monitoring systems are described. The systems include a downhole string disposed in a borehole, the string having a downhole tool and the borehole has fluid therein. A sacrificial electrical sensor element is arranged in or on the string. The sacrificial electrical sensor element includes magnetic material at least partially exposed to the fluid and at least one coil arranged in magnetic communication with the magnetic material. A controller is configured to provide an electrical current into the coil, measure an electrical property of the coil that is based on the magnetic material in magnetic communication with the coil, and determine a wear state of the downhole tool based on the measured electrical property.

    Downhole closed loop drilling system with depth measurement

    公开(公告)号:US09963936B2

    公开(公告)日:2018-05-08

    申请号:US14049430

    申请日:2013-10-09

    摘要: A method, system and drilling apparatus for directional drilling are disclosed. A drill bit is located at a downhole end of a drill string in a borehole. A length of the borehole between a surface location and the drill bit at the downhole end of a drill string is determined and an azimuth angle and inclination of the drill bit is obtained. The length of the borehole may be determined by recording an arrival time at a downhole location of an acoustic pulse travelling from a surface location to the downhole location and determines the travel time and borehole length therefrom. A downhole processor determines a position and orientation of the drill bit from the determined length, azimuth angle and inclination and alters a steering parameter of the drill bit using the determined position and orientation of the drill bit to obtain a selected trajectory for drilling the borehole.

    Correction for gain variation due to fast changing NMR sensor gain
    8.
    发明授权
    Correction for gain variation due to fast changing NMR sensor gain 有权
    校正由于快速变化的NMR传感器增益而导致的增益变化

    公开(公告)号:US09194830B2

    公开(公告)日:2015-11-24

    申请号:US13412817

    申请日:2012-03-06

    CPC分类号: G01N24/081 G01R33/5659

    摘要: An apparatus for performing nuclear magnetic resonance (NMR) measurements of a material of interest includes an NMR tool and a processor. The NMR tool includes a transmitter antenna; a transmitter coupled to the transmitter antenna; and a receiver antenna configured to receive NMR signals in response to transmitted pulses of electromagnetic energy transmitted by the transmitter antenna. The NMR signals include at least a first signal and a second signal of a phase-alternated group of signals. The processor is configured to receive the NMR signals; receive a first system gain related to the first signal and a second system gain related to the second signal, each system gain being related to a system comprising the NMR tool and the material of interest; and calibrate the NMR signals using the first system gain and the second system gain.

    摘要翻译: 用于对感兴趣的材料进行核磁共振(NMR)测量的装置包括NMR工具和处理器。 NMR工具包括发射机天线; 耦合到发射机天线的发射机; 以及接收器天线,其被配置为响应于由所述发射机天线发送的电磁能量的传输脉冲而接收NMR信号。 NMR信号至少包括相位交替信号组的第一信号和第二信号。 处理器被配置为接收NMR信号; 接收与第一信号相关的第一系统增益和与第二信号相关的第二系统增益,每个系统增益与包括NMR工具和感兴趣材料的系统相关; 并使用第一系统增益和第二系统增益校准NMR信号。

    SYSTEM AND METHOD TO DETECT A FLUID FLOW WITHOUT A TIPPING PULSE
    9.
    发明申请
    SYSTEM AND METHOD TO DETECT A FLUID FLOW WITHOUT A TIPPING PULSE 有权
    用于检测无流动脉冲的流体流动的系统和方法

    公开(公告)号:US20150077103A1

    公开(公告)日:2015-03-19

    申请号:US14551979

    申请日:2014-11-24

    IPC分类号: G01V3/32 G01F1/56 G01V3/38

    CPC分类号: G01V3/32 G01F1/56 G01V3/38

    摘要: An apparatus and method to detect a fluid flow. The apparatus includes a nuclear magnetic resonance (NMR) tool to perform an NMR measurement on the fluid in a sensitive volume by establishing a magnetic field in the sensitive volume that exhibits a change in magnitude in a direction of the fluid flow when the fluid flow is radial with respect to the NMR tool and by transmitting refocus pulses, without any tipping pulse, to obtain the NMR measurement comprising spin echo signals. The system also includes a processor to receive the NMR measurement from the NMR tool and determine whether the fluid flow exists based on an amplitude of the NMR measurement.

    摘要翻译: 一种检测流体流动的装置和方法。 该装置包括核磁共振(NMR)工具,用于通过在灵敏体积中建立磁场来对流体的灵敏体积进行NMR测量,该磁场在流体流动是在流体流动方向上呈现出在流体流动方向上的大小变化 径向相对于NMR工具,并且通过发射再聚焦脉冲而没有任何倾翻脉冲,以获得包括自旋回波信号的NMR测量。 该系统还包括从NMR工具接收NMR测量的处理器,并且基于NMR测量的幅度来确定流体流是否存在。

    Apparatus and Method for Determining a Fluid Property Downhole Using a Bulk Reading Refractometer
    10.
    发明申请
    Apparatus and Method for Determining a Fluid Property Downhole Using a Bulk Reading Refractometer 有权
    使用散点读数折射仪确定井下流体特性的装置和方法

    公开(公告)号:US20140300889A1

    公开(公告)日:2014-10-09

    申请号:US13856815

    申请日:2013-04-04

    IPC分类号: G01V8/10 G01N21/41

    摘要: In one aspect, an apparatus for determining a property of a fluid is disclosed that in one embodiment may include a transparent member having an axis and a first end substantially perpendicular to the axis and a second end having an outer surface at a first angle to the axis, a light source directing light at the first end, a detector placed spaced from the second end, the space between the second end and the detector containing a fluid, wherein the detector detects light exiting from the outer surface at a second angle to the axis and passing through the fluid, and a controller for determining the second angle from the light detected by the detector. A processor determines the bulk fluid refractive index from the light detected by the detector and a property of the fluid therefrom.

    摘要翻译: 在一个方面,公开了一种用于确定流体性质的装置,其在一个实施例中可以包括透明构件,该透明构件具有轴线和基本上垂直于该轴线的第一端,而第二端部具有与 轴,在第一端引导光的光源,与第二端间隔开的检测器,第二端和检测器之间的空间包含流体,其中检测器以与第二端相反的第二角度检测从外表面出射的光 并且通过流体;以及控制器,用于根据由检测器检测到的光来确定第二角度。 处理器根据由检测器检测到的光和从其中的流体的性质确定散装流体的折射率。