Cross-over tool return port cover
    1.
    发明申请
    Cross-over tool return port cover 失效
    交叉工具返回端口盖

    公开(公告)号:US20050006092A1

    公开(公告)日:2005-01-13

    申请号:US10614500

    申请日:2003-07-07

    IPC分类号: E21B43/04

    CPC分类号: E21B43/04

    摘要: The present invention provides a return port cover that can close and open a return port separate from tubing movement caused by stretching or contracting under stress or other induced pipe movement from downhole conditions. For example, the return port cover can assist in preventing pack “fluffing” by preventing unintended fluid communication through an associated downhole tool regardless of the position of a circulating valve means. The return port cover can be biased, so that in one position it closes the port and in another position opens the port based on relative tubing placement at different portions of the fracturing operation or other well treatment operations.

    摘要翻译: 本发明提供了一种返回端口盖,其能够关闭并打开与由应力或来自井下条件的其他诱导的管道运动引起的拉伸或收缩引起的管路运动分离的返回端口。 例如,无论循环阀装置的位置如何,返回端口盖可以通过防止意外的流体连通通过相关的井下工具来帮助防止包装“起毛”。 返回端口盖可以被偏置,使得在一个位置中它关闭端口,并且在另一位置,基于在压裂操作或其他井处理操作的不同部分处的相对管道布置来打开端口。