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    VARIABLE DIAMETER EXPANSION TOOL AND EXPANSION METHODS
    4.
    发明申请
    VARIABLE DIAMETER EXPANSION TOOL AND EXPANSION METHODS 失效
    可变直径膨胀工具和膨胀方法

    公开(公告)号：US20060225879A1

    公开(公告)日：2006-10-12

    申请号：US11103327

    申请日：2005-04-11

    申请人： John Gano ,  Tance Jackson

    发明人： John Gano ,  Tance Jackson

    IPC分类号： E21B19/16

    CPC分类号： E21B43/105

    摘要： The present inventions relate to improved apparatus and methods for radially expanding tubulars, such as tubing, casing and sand-control screen assemblies in a subterranean oil or gas well, and more specifically, to a variable diameter expansion tool for expanding downhole tubulars to varying diameters. In general, the inventions provide apparatus and methods for radially expanding a tubular, such as pipe, tubing, screen or screen assembly, deployed in a subterranean well by moving an expansion tool axially through the well. An automatically infinitely variable-diameter expansion cone tool is provided. A variable-diameter cone is provided, movable between an expanded position and a retracted position. The cone is enlarged to its expanded position and advanced through expandable components until a restriction is reached. At the restriction, the variable-diameter cone automatically retracts enough to allow the tool to continue advancing through the wellbore. When the restriction is past, the variable-diameter cone enlarges again to its expanded position.

    摘要翻译： 本发明涉及用于在地下油井或气井中径向膨胀管状物例如管道，套管和防砂筛网组件的改进的装置和方法，更具体地涉及一种用于将井下管道扩展至不同直径的可变直径膨胀工具 。 通常，本发明提供了用于通过使膨胀工具轴向移动通过井而径向膨胀管状物（例如管道，管道，筛网或筛网组件）的装置和方法，其部署在地下井中。 提供了一种自动无级变径膨胀锥形工具。 提供可变直径锥体，其可在扩张位置和缩回位置之间移动。 锥体扩大到其扩展位置，并通过可扩展部件前进，直到达到限制。 在限制下，可变直径锥体自动缩回足以允许工具继续前进通过井眼。 当限制过去时，可变直径锥再次扩大到其扩展位置。