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    SUBSEA DRILLING WITH CASING
    2.
    发明公开
    SUBSEA DRILLING WITH CASING 有权
    UNTERWASSERBHRUNG MIT VERRHRUNG

    公开(公告)号：EP2366055A2

    公开(公告)日：2011-09-21

    申请号：EP09806156.7

    申请日：2009-11-17

    申请人： Weatherford/Lamb, Inc.

    发明人： TREVINO, Jose A. ,  ODELL, II, Albert C. ,  TWARDOWSKI, Eric M. ,  LE, Tuong Thanh ,  XU, Wei Jake ,  FEASEY, Guy F.

    IPC分类号： E21B7/20

    CPC分类号： E21B7/208 ,  E21B3/00 ,  E21B7/124 ,  E21B7/20 ,  E21B17/06 ,  E21B17/07 ,  E21B19/002 ,  E21B23/02 ,  E21B33/035 ,  E21B33/143 ,  E21B34/04 ,  E21B43/101 ,  E21B47/06

    摘要： A drilling assembly, comprising: a casing (1020); a conveyance string (1015) releasably coupled to an interior surface of the casing; a drill bit (1025) rotatable relative to the casing; a motor (1040) attached to the conveyance string and configured to rotate the drill bit relative to the casing and to carry a drilling load; a rotating seal (1055) configured to rotatably connect the drill bit to the casing; and a running tool for (1060) releasably coupling the conveyance string to the casing, the running tool having: a tubular body having a window; a gripping member radially movable between an engaged position and a disengaged position in the window; and a mandrel disposed in the tubular body and selectively movable from a first position, wherein the gripping member is in the engaged position, to a second position, to allow the gripping member to move to the disengaged position. Also a method of forming a wellbore, comprising: providing a drilling assembly comprising a casing and an axially retracting assembly having: a first tubular; a second tubular at least partially disposed in the first tubular a support member disposed in the second tubular and movable from a first axial position to a second axial position relative to the second tubular, wherein, in the first axial position, the support member maintains the second tubular axially fixed to the first tubular, and in the second axial position, allows the second tubular to move relative to the first tubular.

    摘要翻译： 形成井眼的方法包括提供包括一个或多个长度的壳体和具有第一管的轴向回缩组件的钻孔组件; 至少部分地设置在所述第一管状件中并轴向固定到其上的第二管状物; 以及支撑构件，其设置在所述第二管状体中并且可相对于所述第二管状物从第一轴向位置移动到第二轴向位置，其中，在所述第一轴向位置中，所述支撑构件将所述第二管状体轴向固定到所述第一管状物，以及 在第二轴向位置允许第二管相对于第一管移动; 以及设置在所述轴向收缩组件下方的除土构件。 该方法还包括旋转除尘构件以形成井眼; 将所述支撑构件移动到所述第二轴向位置; 并减小轴向回缩组件的长度。