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    • 14. 发明授权
    • Methods and apparatus for attenuating drillstring vibrations
    • 减少钻柱振动的方法和装置
    • US07984771B2
    • 2011-07-26
    • US12887045
    • 2010-09-21
    • Jahir PabonJoachim SihlerDemosthenis PafitisChaur-Jian Hsu
    • Jahir PabonJoachim SihlerDemosthenis PafitisChaur-Jian Hsu
    • E21B7/24
    • E21B17/07
    • Apparatus and methods are described for highly attenuating vibrations of a drillstring assembly while drilling. In one embodiment, vibrations are attenuated by introducing one or more vibration attenuation modules at appropriate assembly locations. For example, vibration attenuation modules may be inserted at locations where vibration energy is expected to be maximal. In one embodiment the vibration attenuation modules include cavities loosely packed with particles of solid material such as sand or metallic powder. In one embodiment, the cavity walls are rough and/or include geometric features that enhance vibration energy transfer to the loosely packed particles in the cavity(ies). The vibration energy is dissipated via friction and inelastic particle-particle and particle-wall collisions that occur as a result of drillstring motion.
    • 描述了用于在钻孔时高度衰减钻柱组件的振动的装置和方法。 在一个实施例中,通过在适当的组装位置引入一个或多个振动衰减模块来衰减振动。 例如,振动衰减模块可以插入在预期振动能量最大的位置。 在一个实施例中,振动衰减模块包括松散地填充有诸如砂或金属粉末的固体材料颗粒的空腔。 在一个实施例中,空腔壁是粗糙的和/或包括几何特征,其增强振动能量传递到空腔中松散包装的颗粒。 振动能量通过钻柱运动产生的摩擦和非弹性粒子 - 粒子和粒子 - 壁碰撞消散。
    • 15. 发明申请
    • METHODS AND APPARATUS FOR ATTENUATING DRILLSTRING VIBRATIONS
    • 用于降低钻井振动的方法和装置
    • US20110011644A1
    • 2011-01-20
    • US12887045
    • 2010-09-21
    • Jahir Alfonso PabonJoachim SihlerDemosthenis Georgeou PafitisChaur-Jian Hsu
    • Jahir Alfonso PabonJoachim SihlerDemosthenis Georgeou PafitisChaur-Jian Hsu
    • E21B7/24
    • E21B17/07
    • Apparatus and methods are described for highly attenuating vibrations of a drillstring assembly while drilling. In one embodiment, vibrations are attenuated by introducing one or more vibration attenuation modules at appropriate assembly locations. For example, vibration attenuation modules may be inserted at locations where vibration energy is expected to be maximal. In one embodiment the vibration attenuation modules include cavities loosely packed with particles of solid material such as sand or metallic powder. In one embodiment, the cavity walls are rough and/or include geometric features that enhance vibration energy transfer to the loosely packed particles in the cavity(ies). The vibration energy is dissipated via friction and inelastic particle-particle and particle-wall collisions that occur as a result of drillstring motion.
    • 描述了用于在钻孔时高度衰减钻柱组件的振动的装置和方法。 在一个实施例中,通过在适当的组装位置引入一个或多个振动衰减模块来衰减振动。 例如,振动衰减模块可以插入在预期振动能量最大的位置。 在一个实施例中,振动衰减模块包括松散地填充有诸如砂或金属粉末的固体材料颗粒的空腔。 在一个实施例中,空腔壁是粗糙的和/或包括几何特征,其增强振动能量传递到空腔中松散包装的颗粒。 振动能量通过钻柱运动产生的摩擦和非弹性粒子 - 粒子和粒子 - 壁碰撞消散。
    • 16. 发明授权
    • Methods and apparatus for attenuating drillstring vibrations
    • 减少钻柱振动的方法和装置
    • US07828082B2
    • 2010-11-09
    • US11523848
    • 2006-09-20
    • Jahir Alfonso PabonJoachim SihlerDemosthenis Georgeou PafitisChaur-Jian Hsu
    • Jahir Alfonso PabonJoachim SihlerDemosthenis Georgeou PafitisChaur-Jian Hsu
    • E21B7/24
    • E21B17/07
    • Apparatus and methods are described for highly attenuating vibrations of a drillstring assembly while drilling. In one embodiment, vibrations are attenuated by introducing one or more vibration attenuation modules at appropriate assembly locations. For example, vibration attenuation modules may be inserted at locations where vibration energy is expected to be maximal. In one embodiment the vibration attenuation modules include cavities loosely packed with particles of solid material such as sand or metallic powder. In one embodiment, the cavity walls are rough and/or include geometric features that enhance vibration energy transfer to the loosely packed particles in the cavity(ies). The vibration energy is dissipated via friction and inelastic particle-particle and particle-wall collisions that occur as a result of drillstring motion.
    • 描述了用于在钻孔时高度衰减钻柱组件的振动的装置和方法。 在一个实施例中,通过在适当的组装位置引入一个或多个振动衰减模块来衰减振动。 例如,振动衰减模块可以插入在预期振动能量最大的位置。 在一个实施例中,振动衰减模块包括松散地填充有诸如砂或金属粉末的固体材料颗粒的空腔。 在一个实施例中,空腔壁是粗糙的和/或包括几何特征,其增强振动能量传递到空腔中松散包装的颗粒。 振动能量通过钻柱运动产生的摩擦和非弹性粒子 - 粒子和粒子 - 壁碰撞消散。
    • 17. 发明申请
    • USING HYDROSTATIC BEARINGS FOR DOWNHOLE APPLICATIONS
    • 使用用于井下应用的防水轴承
    • US20080099246A1
    • 2008-05-01
    • US11553876
    • 2006-10-27
    • Joachim Sihler
    • Joachim Sihler
    • E21B7/04
    • E21B10/23E21B7/06E21B17/10
    • Hydrostatic bearings are used for drill string stabilization and bottom hole assembly steering. The hydrostatic bearings utilize an existing mud flow as the bearing fluid. For steering, the bearings may be used between movable kick pads and the formation to reduce friction. Alternatively, differential hydrostatic bearing pressure may be utilized to steer. Multi-modal (non-linear and linear) steering may be provided by selectively applying equal and unequal hydrostatic bearing pressures. The bearings can be made more tolerant of imperfections in the formation by utilizing multiple pressure pockets.
    • 静压轴承用于钻柱稳定和底部钻孔组装转向。 静压轴承利用现有的泥浆流作为轴承液。 对于转向,可以在可移动的脚垫和地层之间使用轴承,以减少摩擦。 或者,可以使用差动静压轴承压力来转向。 可以通过选择性地施加相等且不相等的静压轴承压力来提供多模式(非线性和线性)转向。 通过利用多个压力袋,可以使轴承更能承受地层中的缺陷。
    • 18. 发明授权
    • Drill bits and methods of drilling curved boreholes
    • 钻孔钻孔方法和钻孔方法
    • US08469117B2
    • 2013-06-25
    • US13564705
    • 2012-08-01
    • Demosthenis Georgiou PafitisJahir PabonJoachim Sihler
    • Demosthenis Georgiou PafitisJahir PabonJoachim Sihler
    • E21B7/08E21B10/62
    • E21B7/064E21B10/42E21B10/62
    • The invention provides drill bits and methods of drilling curved boreholes. One aspect of the invention provides a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths. Another aspect of the invention provides a method for drilling a curved borehole. The method includes: providing a drill string including a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths; rotating the drill string; and selectively actuating the one or more blades to a plurality of cut depths; thereby drilling a curved borehole.
    • 本发明提供钻头和钻孔弯曲钻孔的方法。 本发明的一个方面提供了一种钻头,其包括钻头体和位于钻头体内的一个或多个刀片,所述一个或多个刀片可独立地致动到多个切削深度。 本发明的另一方面提供了一种用于钻出弯曲钻孔的方法。 该方法包括:提供钻柱,其包括钻头,钻头包括钻头体和位于钻头体内的一个或多个刀片,所述一个或多个刀片可独立地致动到多个切削深度; 旋转钻柱; 以及选择性地将所述一个或多个叶片致动到多个切割深度; 从而钻出弯曲的钻孔。
    • 19. 发明申请
    • COILED TUBING ORIENTER TOOL WITH DIFFERENTIAL LEAD SCREW DRIVE
    • 带有差异导线螺丝驱动的卷绕式管道工具
    • US20110253453A1
    • 2011-10-20
    • US12974055
    • 2010-12-21
    • Joachim Sihler
    • Joachim Sihler
    • E21B7/04
    • E21B7/04E21B7/067Y10T74/18576
    • A technique facilitates control over the orientation of a bottom hole assembly. The bottom hole assembly comprises an orienting tool having a dual-spline drive which, in turn, comprises a first lead screw portion and a second lead screw portion having threads of a first pitch and a second pitch, respectively. A motor is connected to the dual-spline drive to impart rotational motion with respect to the first threads having the first pitch. A difference in pitch between the first pitch and the second pitch enables the rotational motion imparted by the motor to be converted to a slower, higher torque, output via the second lead screw portion. As a result, the orienting tool is able to provide a selective, high torque, low-speed adjustment to the drilling orientation of the bottom hole assembly.
    • 一种技术有助于控制底孔组件的取向。 底孔组件包括具有双花键驱动器的定向工具,该双花键驱动器又分别包括具有第一间距和第二间距的螺纹的第一丝杠部分和第二丝杠部分。 电动机连接到双花键驱动器以相对于具有第一间距的第一线赋予旋转运动。 第一节距和第二节距之间的间距差使得能够通过第二导螺杆部分将由马达赋予的旋转运动转换成较慢的较高扭矩。 结果,定向工具能够为井底组件的钻孔方向提供选择性的,高扭矩的低速调节。
    • 20. 发明申请
    • SYSTEMS AND METHODS FOR PROVIDING ELECTRICAL TRANSMISSION IN DOWNHOLE TOOLS
    • 在井下工具中提供电气传输的系统和方法
    • US20100170671A1
    • 2010-07-08
    • US12348028
    • 2009-01-02
    • Joachim Sihler
    • Joachim Sihler
    • E21B17/00H01R39/00E21B41/00F04B47/00
    • E21B47/12E21B4/02E21B17/028H01R39/646
    • A downhole drilling tool includes a housing defining an axial passageway and a shaft mounted for rotation within the axial passageway such that the housing and shaft form an annular gap. An electrical connector provides a signal to the shaft. The electrical connector includes a first lead assembly coupled to the housing and the shaft, and a second lead assembly coupled to the housing and the shaft. Each lead assembly has an outer ring electrode fixed to the housing and an inner ring electrode fixed to the shaft for rotation therewith such that connector gaps are formed between the outer ring electrodes and the inner ring electrodes. Drilling fluid is pumped through the annular gap to flow through the connector gaps to complete electrical connections between the outer ring electrodes and inner ring electrodes.
    • 井下钻具包括限定轴向通道的壳体和安装成用于在轴向通道内旋转的轴,使得壳体和轴形成环形间隙。 电连接器为轴提供信号。 电连接器包括联接到壳体和轴的第一引线组件和联接到壳体和轴的第二引线组件。 每个引线组件具有固定到壳体的外环电极和固定到轴上的内环电极,以便与其旋转,使得在外环电极和内环电极之间形成连接器间隙。 钻井液被泵送通过环形间隙以流过连接器间隙以完成外环电极和内环电极之间的电连接。