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    • 1. 发明公开
    • OPTIMIZED REPAIR OF A DRILL BIT
    • 钻头的优化修复
    • EP3284900A1
    • 2018-02-21
    • EP16306068.4
    • 2016-08-19
    • VAREL EUROPE (Société par Actions Simplifiée)
    • PELFRENE, GillesTHER, Olivier
    • E21B12/02
    • E21B12/02
    • A method for repairing a drill bit includes: scanning the drill bit after manufacture thereof; comparing the scan to a design model of the drill bit to recognize one or more features of the drill bit, thereby generating a first model of the as-built drill bit; scanning the drill bit after drilling with the drill bit; comparing the scan of the used drill bit to the first model to recognize the features, thereby generating a second model of the used drill bit; simulating a plurality of repair strategies using the first and second models; and selecting one of the repair strategies by comparing results of the simulations.
    • 一种修复钻头的方法,包括:在制造钻头后对其进行扫描; 将所述扫描与所述钻头的设计模型进行比较以识别所述钻头的一个或多个特征,由此生成所述已建成的钻头的第一模型; 在用钻头钻孔之后扫描钻头; 将所使用的钻头的扫描与第一模型进行比较以识别所述特征,从而生成所使用的钻头的第二模型; 使用第一和第二模型来模拟多个修复策略; 并通过比较模拟结果来选择其中一种修理策略。
    • 3. 发明公开
    • PASSIVELY INDUCED FORCED VIBRATION ROCK DRILLING SYSTEM
    • 被动式强迫振动钻井系统
    • EP3258056A1
    • 2017-12-20
    • EP16305713.6
    • 2016-06-13
    • VAREL EUROPE (Société par Actions Simplifiée)
    • PELFRENE, GillesTHER, OlivierRIPPLE, Kenyon Y.
    • E21B6/02
    • E21B6/04E21B6/02E21B10/36E21B10/42E21B10/62E21B17/042E21B44/00F16F1/32F16F3/02F16F15/027
    • A bottomhole assembly includes: a drill bit operable to vibrate when engaged with a formation and rotated; and a suspension sub including: a stator barrel for connection to a pipe string; a traveler barrel for connection to the drill bit; a slip joint longitudinally coupling the traveler barrel to the stator barrel while allowing movement of the traveler barrel between an extended position and a retracted position; a torsional joint connecting the traveler barrel to the stator barrel at and between the positions; and one or more springs disposed between the stator barrel and the traveler barrel. The suspension is tuned relative to the drill bit to: dampen the vibration of the drill bit when the BHA is rotated at a first angular velocity; and resonate the vibration of the drill bit when the BHA is rotated at a second angular velocity, thereby imparting percussive energy to the drill bit.
    • 底部钻具组合包括:钻头,其可操作以在与地层接合并旋转时振动; 以及悬架副,其包括:用于连接到管柱的定子套筒; 用于连接到钻头的钢丝圈筒; 滑动接头,其将所述钢丝圈筒纵向联接到所述定子筒,同时允许所述钢丝圈筒在延伸位置和缩回位置之间移动; 扭转接头,其在位置处和位置之间将钢丝圈筒连接到定子筒; 以及布置在定子筒与行走筒之间的一个或多个弹簧。 悬挂装置相对于钻头进行调整以:当BHA以第一角速度旋转时衰减钻头的振动; 并且当BHA以第二角速度旋转时共振钻头的振动,从而向钻头施加冲击能量。