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    • 2. 发明授权
    • Systems and methods for improving drilling efficiency
    • 提高钻井效率的系统和方法
    • US08939234B2
    • 2015-01-27
    • US13497490
    • 2010-09-21
    • Robert Eugene Mebane, IIIFrederick Ray Florence
    • Robert Eugene Mebane, IIIFrederick Ray Florence
    • E21B7/24E21B7/00E21B44/02
    • E21B44/02
    • A method for drilling a borehole in an earthen formation comprises (a) providing a drilling system including a drillstring having a longitudinal axis, a bottom-hole assembly coupled to a lower end of the drillstring, and a drill bit coupled to a lower end of the bottom-hole assembly. In addition, the method comprises (b) rotating the drill bit at a rotational speed. Further, the method comprises (c) applying weight-on-bit to the drill bit and advancing the drill bit through the formation to form the borehole. Still further, the method comprises (d) pumping a drilling fluid down the drillstring to the drill bit. The drilling fluid has a flow rate down the drillstring. Moreover, the method comprises (e) oscillating the rotational speed of the drill bit during (c). The method also comprises (f) generating non-steady state conditions in the borehole during (e).
    • 用于在土层中钻孔的方法包括(a)提供钻井系统,该钻井系统包括具有纵向轴线的钻柱,联接到钻柱的下端的底孔组件和与钻柱的下端相连的钻头 底孔组件。 另外,该方法包括(b)以旋转速度旋转钻头。 此外,该方法包括(c)对钻头施加钻头重量并使钻头前进通过地层以形成钻孔。 此外,该方法包括(d)将钻柱下方的钻井液泵送到钻头。 钻井液具有沿钻柱下方的流速。 此外,该方法包括(e)在(c)期间振荡钻头的转速。 该方法还包括(f)在(e)期间在钻孔中产生非稳态条件。
    • 4. 发明申请
    • SYSTEMS AND METHODS FOR IMPROVING DRILLING EFFICIENCY
    • 提高钻井效率的系统和方法
    • US20120217067A1
    • 2012-08-30
    • US13497490
    • 2010-09-21
    • Robert Eugene Mebane, IIIFrederick Ray Florence
    • Robert Eugene Mebane, IIIFrederick Ray Florence
    • E21B7/00
    • E21B44/02
    • A method for drilling a borehole in an earthen formation comprises (a) providing a drilling system including a drillstring having a longitudinal axis, a bottom-hole assembly coupled to a lower end of the drillstring, and a drill bit coupled to a lower end of the bottom-hole assembly. In addition, the method comprises (b) rotating the drill bit at a rotational speed. Further, the method comprises (c) applying weight-on-bit to the drill bit and advancing the drill bit through the formation to form the borehole. Still further, the method comprises (d) pumping a drilling fluid down the drillstring to the drill bit. The drilling fluid has a flow rate down the drillstring. Moreover, the method comprises (e) oscillating the rotational speed of the drill bit during (c). The method also comprises (f) generating non-steady state conditions in the borehole during (e).
    • 用于在土层中钻孔的方法包括(a)提供钻井系统,该钻井系统包括具有纵向轴线的钻柱,联接到钻柱的下端的底孔组件和与钻柱的下端相连的钻头 底孔组件。 另外,该方法包括(b)以旋转速度旋转钻头。 此外,该方法包括(c)对钻头施加钻头重量并使钻头前进通过地层以形成钻孔。 此外,该方法包括(d)将钻柱下方的钻井液泵送到钻头。 钻井液具有沿钻柱下方的流速。 此外,该方法包括(e)在(c)期间振荡钻头的转速。 该方法还包括(f)在(e)期间在钻孔中产生非稳态条件。