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    • 5. 发明申请
    • Methods and apparatus for attenuating drillstring vibrations
    • 减少钻柱振动的方法和装置
    • US20080066965A1
    • 2008-03-20
    • 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。
    • 9. 发明申请
    • Method and device for complex permittivity measurements as a function of frequency
    • 作为频率的函数的复介电常数测量的方法和装置
    • US20070090846A1
    • 2007-04-26
    • US11241185
    • 2005-09-30
    • Tarek HabashyNikita SeleznevMohammad-Reza TaherianAustin Boyd
    • Tarek HabashyNikita SeleznevMohammad-Reza TaherianAustin Boyd
    • G01R27/00
    • G01R27/2647
    • An apparatus for use in a system that includes a network analyzer for determining a property, such as dielectric permittivity of a sample material as a function of frequency, the apparatus including: a cylindrical chamber for receiving the sample; a coaxial connector having a first relatively small diameter end coupleable with the analyzer and a second relatively large diameter end communicating with a side of the cylindrical chamber, the connector having inner and outer coaxial conductors; the inner conductor of the connector having a diameter that tapers outwardly from the first end to the second end, and the outer conductor of the connector having an inner surface whose diameter tapers outwardly from the first end to the second end. The chamber can accommodate relatively large samples, such as standard earth formation coring samples.
    • 一种用于系统的装置,包括用于确定作为频率的函数的样品材料的介电常数的性质的网络分析仪,所述装置包括:用于接收样品的圆柱形室; 同轴连接器,其具有与分析器相连的第一相对较小直径的端部,以及与圆柱形腔室的一侧连通的第二较大直径端,该连接器具有内部和外部同轴导体; 连接器的内部导体具有从第一端向第二端向外逐渐变细的直径,并且连接器的外部导体具有一个内表面,该内表面的直径从第一端向第二端向外逐渐变细。 该室可以容纳相对大的样品,例如标准的地层取芯样品。