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    • 24. 发明申请
    • SYSTEM AND APPARATUS FOR MODELING THE BEHAVIOR OF A DRILLING ASSEMBLY
    • 用于建模钻井总成行为的系统和装置
    • US20120292110A1
    • 2012-11-22
    • US13370013
    • 2012-02-09
    • Geoffrey C. Downton
    • Geoffrey C. Downton
    • E21B47/02
    • E21B7/04E21B44/00E21B47/022
    • A method for drilling a borehole includes obtaining, while drilling the borehole, sensor data for the drilling assembly, analyzing, while drilling the borehole, the sensor data using a drilling behavior model to obtain results, and adjusting the drilling of the borehole based on the results. The drilling behavior model models drilling of the borehole using a distance drilled, a number of touch points, a number of bend angles, a number of external moments, a number of lengths of distributed weights, a lateral displacement of a center of the borehole at a bit, at least one vertical displacement from the center of the borehole, at least one angular offset, at least one force, and at least one mass per unit length.
    • 一种用于钻孔的方法包括:在钻孔时,获得钻孔组件的传感器数据,在钻孔时分析钻孔行为模型的传感器数据,以获得结果,并且基于 结果。 钻井行为模型利用钻孔距离,多个接触点,多个弯曲角度,多个外力矩,多个分布重量的长度,钻孔中心的横向位移 从钻孔的中心起至少一个垂直位移,至少一个角偏移,至少一个力和至少一个单位长度的质量。
    • 29. 发明授权
    • Gyroscopes
    • 陀螺仪
    • US4257280A
    • 1981-03-24
    • US73823
    • 1979-09-10
    • Peter H. ColesGeoffrey C. Downton
    • Peter H. ColesGeoffrey C. Downton
    • G01C19/18G01C19/08
    • G01C19/08Y10T74/1279Y10T74/1282
    • The invention provides a gyroscope employing a sensitive element rotated by a hysteresis motor and which has an improved bias repeatability, the bias arising from vibration of the sensitive element imparted thereto by the hysteresis motor. An identifiable point associated with the sensitive element (9) is sensed by first sensor means (37, 38, 67, 71) and a pole vector associated with the hysteresis motor (6) is sensed directly or indirectly by second sensor means (64), the outputs of these sensor means being applied to comparator means (73) which is operable to compare the phase of the pole vector (V.sub.p) with respect to the identifiable point. Control means (76, 79) are also provided which are responsive to the output of the comparator means (73) and operable to adjust the phase of the pole vector (V.sub.p) with respect to the identifiable point to a required relationship, the gyroscope further comprising means (73), for maintaining that required relationship once established.The invention is particularly applicable to flexure-suspended free-rotor gyroscopes.
    • 本发明提供一种陀螺仪,其使用由滞后电动机旋转的敏感元件,并且其具有改善的偏置重复性,由由滞后电动机赋予的敏感元件的振动引起的偏差。 与敏感元件(9)相关联的可识别点由第一传感器装置(37,38,67,71)感测,并且与滞后电动机(6)相关联的极矢量由第二传感器装置(64)直接或间接地感测, ,这些传感器装置的输出被施加到比较器装置(73),比较器装置(73)可操作以将极矢量(Vp)的相位相对于可识别点进行比较。 还提供了控制装置(76,79),其响应于比较器装置(73)的输出并且可操作以相对于可识别点将极矢量(Vp)的相位调整到所需的关系,陀螺仪进一步 包括用于在建立之后保持所需关系的装置(73)。 本发明特别适用于挠性悬挂自由转子陀螺仪。