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    • 2. 发明申请
    • LOOK-AHEAD BOUNDARY DETECTION AND DISTANCE MEASUREMENT
    • LOOK-AHEAD边界检测和距离测量
    • US20100176812A1
    • 2010-07-15
    • US12067582
    • 2007-05-01
    • Michael S. BittarGuoyu HuWilliam E. Hendricks
    • Michael S. BittarGuoyu HuWilliam E. Hendricks
    • G01V3/18
    • G01V3/24
    • Systems and methods for look-ahead boundary detection and distance estimation are disclosed. In some embodiments, a drilling method includes extending a borehole with a drill string that includes a resistivity logging tool. The logging tool makes upward-looking and downward-looking resistivity measurements based on radial current flow. The upward looking and downward looking resistivity measurements are processed to estimate the distance to approaching bed boundaries, and drilling can be halted when the estimated distance reaches a desired value. Such information can be used to anchor casing at advantageous points and can further be used to avoid penetrating water-containing formations below a hydrocarbon reservoir.
    • 公开了用于先行边界检测和距离估计的系统和方法。 在一些实施例中,钻井方法包括用包括电阻率测井工具的钻柱延伸钻孔。 测井工具基于径向电流流动,产生向上和向下的电阻率测量。 处理向上观察和向下观察的电阻率测量以估计接近床边界的距离,并且当估计的距离达到期望值时可以停止钻孔。 这样的信息可以用于将外壳锚定在有利的位置,并且可以进一步用于避免在油气藏下方渗透含水地层。
    • 5. 发明授权
    • Automatic torque sensor
    • 自动转矩传感器
    • US4081048A
    • 1978-03-28
    • US599179
    • 1975-07-25
    • William E. Hendricks
    • William E. Hendricks
    • B62M6/50B62M6/75B62M13/02B62M7/08
    • B62M13/02
    • A friction drive for a vehicle wherein a friction drive wheel is mounted to engage frictionally the pneumatic tire constituting the periphery of a vehicle traction wheel, such drive wheel being carried on a strut mounted to swing about an axis remote therefrom and which is parallel to and spaced from the axis of the traction wheel in an arrangement such that the strut is subjected to a reaction torque in response to driving friction force in one direction which in turn urges the center of the drive wheel towards the center of the ground wheel. The drive wheel is of lesser diameter than the traction wheel so as to effect a reduction in rate of rotation, and is of frusto-conical configuration so that a variation in drive ratio can be driven by a storage battery powered direct current motor, with the batteries carried either on the vehicle or on a trailer towed thereby.
    • 一种用于车辆的摩擦驱动器,其中安装有摩擦驱动轮以摩擦地构成构成车辆牵引轮的周边的充气轮胎,该驱动轮被承载在支撑件上,所述支柱安装成围绕其远离轴线摆动并且平行于 与牵引轮的轴线间隔开,使得支柱响应于在一个方向上的驱动摩擦力而受到反作用力,其反过来又推动驱动轮的中心朝向地面轮的中心。 驱动轮的直径小于牵引轮的直径,以便降低转动速度,并且具有截头圆锥形构造,使得驱动比的变化可以由蓄电池供电的直流电动机驱动,其中 由车辆拖车或拖车拖车的电池。