Retrievable guide anchor assembly and methods for milling a well casing
    2.
    发明公开
    Retrievable guide anchor assembly and methods for milling a well casing 失效
    可收回引导锚固组件和方法,用于铣削套管井

    公开(公告)号:EP0846836A3

    公开(公告)日:2002-01-23

    申请号:EP97309842.9

    申请日:1997-12-05

    摘要: A tubular anchor assembly (22) coaxially and releasably securable in a subterranean well bore casing, comprising: a tubular inner mandrel (88); a tubular slip carrier (98,132) coaxially circumscribing the inner mandrel in a radially outwardly spaced relationship therewith, the slip carrier having a circumferentially spaced series of side wall slip windows (100, 102, 136, 138) therein and outwardly bounding an annular space between the inner mandrel and the slip carrier; a circumferentially spaced series of slips (40,42) carried in the annular space for radial movement through the slip windows between retracted and extended positions; and a circumferentially spaced series of arcuate, elongated spring members (108) disposed in the annular space and resiliently biasing the slips toward their retracted positions, the spring members being interdigitated with the slips and having longitudinally central portions secured to the slip carrier, with each slip being engaged by end portions of two spring members on circumferentially opposite sides thereof.

    Multilateral well drilling and completion method and apparatus
    5.
    发明公开
    Multilateral well drilling and completion method and apparatus 失效
    方法和用于钻井设备和完成具有多个侧孔的井孔

    公开(公告)号:EP1249574A2

    公开(公告)日:2002-10-16

    申请号:EP02077722.3

    申请日:1995-08-24

    IPC分类号: E21B23/02 E21B41/00 E21B7/08

    摘要: Multilateral wells and improved multilateral well structures are made by setting a diverter (332) at a prescribed position and a prescribed orientation in a main well flow conductor (120) located within a main wellbore (110), boring through a sidewall of the main well flow conductor (120) and into a material (112) surrounding the main well flow conductor (120), the boring creating a window (324) having a particular shape in the sidewall, the orientation of the diverter (332) determining a lateral position of the window in the main well flow conductor (120), a lateral wellbore (150) thereby being formed in the material and extending from the main wellbore (110), and lining the lateral wellbore (150) with a liner (340), the liner having an interface end (342), the interface end being adapted to contact a periphery of the window (342) in the sidewall, and cementing the liner (340) in place within the lateral wellbore (150). The step of cementing creates a pressure-bearing seal between the periphery of the window and the interface end (342) of the liner (340). The method allows multiple lateral wellbores to be joined to the main wellbore and provides for connectivity among main and lateral wellbores, pressure-bearing sealing of joints to allow selective isolation of one or more wellbores or portions thereof and subsequent wellbore access for rework or other purposes.

    摘要翻译: 多分支井的和改进的多分支井结构由设置通过主井的侧壁镗位于主井筒(110)内的规定位置的分流(332)并在主井流导体(120)规定的方位作 流导体(120)和进入围绕主井流导体(120)的材料(112),所述镗创建具有在侧壁的特定形状,分流器的取向的窗口(324)(332)确定的采矿的横向位置 在主井流导体(120),一个侧井眼(150),从而形成在所述材料,并从主井孔(110)延伸,并且与一个衬垫衬在横向井筒(150)(340)的窗口的 具有接口端(342)的衬垫,所述接口端为angepasst以接触在侧壁上的窗口(342)的周边,并且横向井筒(150)内的适当位置固井衬垫(340)。 固井的步骤创建窗口的周边和衬垫(340)的接口端(342)之间的压力轴承密封。 该方法允许多个分支井筒将被接合到主井筒和提供用于主要和侧向井眼,关节的承压密封之间的连通性,以允许其一个或更多个井筒或部分的选择性分离和返工或其他目的的后续井筒访问 ,

    Torque resistent whipstock
    6.
    发明公开
    Torque resistent whipstock 有权
    防破坏者Ablenkkeil

    公开(公告)号:EP0942145A2

    公开(公告)日:1999-09-15

    申请号:EP99301754.0

    申请日:1999-03-09

    发明人: White, Pat M.

    IPC分类号: E21B7/08

    CPC分类号: E21B7/061

    摘要: A retrievable whipstock is connected to a packer below the whipstock. The whipstock comprises an upper housing (32) attached to the deflecting portion (30) and a lower housing (34) attached to the packer. Housings (32,34) are prevented from rotating with respect to each other by engagement of profiles (40,42), with profile (40) comprising circumferentially spaced recesses in upper housing (32) and profile (34) comprising upwardly extending projections formed on lower housing (34).
    This engagement profiles allow the whipstock to resist torque that is imparted to the whipstock when deflecting a milling tool, so that misalignment of the whipstock relative to well is prevented.

    摘要翻译: 可收回的造斜器连接到造斜器下面的封隔器。 造斜器包括附接到偏转部分(30)的上壳体(32)和附接到封隔器的下壳体(34)。 壳体(32,34)通过轮廓(40,42)的接合而防止相对于彼此旋转,其中轮廓(40)包括在上壳体(32)中的周向间隔开的凹部,并且轮廓(34)包括形成的向上延伸的突起 在下壳体(34)上。 该接合轮廓允许造斜器抵抗当铣削工具偏转时施加到造斜器的扭矩,从而防止造斜器相对于井的不对准。

    Subterranean well bore casing milling apparatus
    7.
    发明公开
    Subterranean well bore casing milling apparatus 失效
    Unterirdische Vorrichtung zumFräseneiner Bohrlochverrohrung

    公开(公告)号:EP0846837A2

    公开(公告)日:1998-06-10

    申请号:EP97309894.0

    申请日:1997-12-05

    摘要: Subterranean well bore casing milling apparatus comprising: a tubular anchor assembly (22) having a top end portion and being coaxially and releasably securable in the casing, said tubular anchor assembly including a tubular inner mandrel having an outer side surface, a tubular slip carrier coaxially circumscribing the inner mandrel in a radially outwardly spaced relationship therewith, the slip carrier having a circumferentially spaced series of side wall slip windows therein and outwardly bounding an annular space between the inner mandrel and the slip carrier, a circumferentially spaced series of slips (40, 42) disposed in the annular space, with radially outer portions ofthe slips being received in the slip windows for movement therethrough between radially retracted and radially extended positions, a biasing structure operative to resiliently bias the slips to their radially retracted positions, and a setting structure operative to force the slips from their radially retracted positions to their radially extended positions; a mill guide member (24) having a lower end portion connected to the top end portion of the tubular anchor assembly, and a tubular upper end portion (24a); and a tubular retrieval member coaxially securable to a milling pipe (30) and being coaxially latchable in the tubular member coaxially secured to the upper mill guide member end portion.

    摘要翻译: 地下井筒套管铣削设备包括:管状锚固组件(22),其具有顶端部分并且同轴并可释放地固定在壳体中,所述管状锚固组件包括管状内心轴,其具有外侧表面,管状滑动载体同轴 以与其径向向外间隔的关系围绕内心轴,滑动载架在其中具有周向间隔开的一系列侧壁滑动窗口,并向外限定内心轴和滑动架之间的环形空间,周向间隔开的一系列滑动件(40, 42)设置在环形空间中,滑动件的径向外部部分被容纳在滑动窗口中,用于在径向缩回的和径向延伸的位置之间移动,偏置结构可操作以将滑动件弹性地偏置到其径向缩回位置,以及设置结构 可操作地将滑动件从径向缩回的位置推动 它们的径向延伸位置; 磨机引导构件(24),其具有连接到管状锚固组件的顶端部分的下端部分和管状上端部分(24a); 以及同轴地固定到铣削管(30)并且同轴地锁定在同轴地固定到上铣刀引导构件端部的管状构件中的管状取出构件。