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    • 12. 发明授权
    • Downhole drilling apparatus
    • 井下钻孔设备
    • US06374924B2
    • 2002-04-23
    • US09507254
    • 2000-02-18
    • John HantonTommie A. FreemanWilliam M. Imwalle
    • John HantonTommie A. FreemanWilliam M. Imwalle
    • E21B402
    • E21B7/061E21B17/00
    • A downhole drilling apparatus for interconnection in a casing or liner string having a drill bit disposed thereon for enabling the drilling of intersecting wellbores without removal of the drill bit is disclosed. In a disclosed embodiment, the apparatus comprises a housing having a window. A whipstock is disposed within the housing. Between the window and the whipstock is a filler. The whipstock and the filler define a central bore providing a fluid path through the apparatus. A back pressure valve may be disposed within the central bore to prevent back flow of fluids through the apparatus. Once the total depth of an initial wellbore is reached, the casing or liner string, including the apparatus, may be cemented in place. Thereafter, an intersecting wellbore may be drilled by laterally deflecting a second drill bit with the whipstock through the window of the housing.
    • 公开了一种井下钻孔装置,用于在具有钻头位于其上的套管或衬套管中进行互连,用于能够钻取相交的井筒而不去除钻头。 在公开的实施例中,该装置包括具有窗口的壳体。 造斜器被放置在壳体内。 在窗户和造斜器之间是一个填料。 造斜器和填料限定了一个中心孔,提供通过该装置的流体路径。 背压阀可以设置在中心孔内以防止流体逆流流过设备。 一旦达到初始井眼的总深度,包括该装置在内的套管或衬套可以被粘结就位。 此后,可以通过横向偏转造斜器通过壳体的窗口使第二钻头偏转来钻出相交井眼。
    • 18. 发明授权
    • Combination cementing shoe and basket
    • 组合固定鞋和篮子
    • US4469174A
    • 1984-09-04
    • US466185
    • 1983-02-14
    • Tommie A. Freeman
    • Tommie A. Freeman
    • E21B17/14E21B21/10E21B33/136E21B33/14E21B34/00E21B34/06
    • E21B21/10E21B17/14E21B33/136E21B33/14E21B34/063E21B2034/005
    • A combination cementing shoe and basket, comprising a substantially tubular mandrel having a cement basket disposed thereabout, the cement basket being maintained in a collapsed mode by an annular overshot at the bottom of a coupling at the top of the mandrel. A flapper valve assembly is located within the mandrel, being maintained in an open mode by the presence of a fillup tube disposed in the valve orifice. The bottom of the fillup tube is secured to a slidable ball seat located below the flapper valve assembly. The ball seat is initially secured in place by attachment through a plurality of shear rods to a tubular activating sleeve disposed around the mandrel and under the cement basket, the activating sleeve being maintained in its initial position by contact with the bottom of the cement basket, which is fixed to the mandrel by a shear screw. To operate the apparatus, a tripping ball is pumped down the casing to the ball seat, whereupon the casing pressure would cause the basket shear rods, acted upon by the activating sleeve, to shear, the basket moving downward and out from under the coupling overshot. Continued application of pressure causes the activating sleeve screw to shear, allowing the ball seat to move to the bottom of the mandrel, and removing the fillup tube from the flapper valve orifice, permitting the flapper to close.
    • 一种组合固定鞋和篮子,其包括具有布置在其周围的水泥篮的基本上管状的心轴,水泥篮通过在心轴顶部的联接器的底部处的环形过冲保持在折叠模式。 挡板阀组件位于心轴内,通过设置在阀孔中的填充管的存在而保持在打开模式。 填充管的底部固定到位于挡板阀组件下方的可滑动的球座。 球座首先通过多个剪切杆附接到位于心轴周围的管状活动套筒和水泥筐下方固定在适当的位置,活动套筒通过与水泥筐底部的接触保持在其初始位置, 其通过剪切螺钉固定到心轴。 为了操作该装置,将脱扣球从壳体向下泵送到球座,由此套管压力将使由活塞套筒作用的篮式剪力杆剪切,篮子向下移动并从联轴器下方移出 。 继续施加压力导致激活套筒螺丝剪切,允许球座移动到心轴的底部,并且从挡板阀孔口移除填充管,允许挡板关闭。