公开(公告)号：US06189212B1

公开(公告)日：2001-02-20

申请号：US09393801

申请日：1999-09-10

申请人： Phillip J. Hawkins ,  Joseph A. Divella

发明人： Phillip J. Hawkins ,  Joseph A. Divella

IPC分类号： B23P1500

CPC分类号： B23P19/025 ,  Y10T29/49352 ,  Y10T29/531

摘要： A method for removing a plug from engagement with a nuclear reactor steam generator tube within a tube bundle, which plug has a shell, an expander, and a plug top, by providing a drill bit having a pilot portion and a drill portion, where the pilot portion diameter is smaller than the drill portion diameter. Further, removing a portion of the plug shell and expander using the drill bit and leaving the plug top in the tube. The plug top may be removed by providing a gripper tool, inserting the gripper tool into the tube, urging the gripper against the plug top and removing the plug top by removing the gripper from the tube.

摘要翻译： 一种用于通过提供具有先导部分和钻头部分的钻头来移除塞子以与管束内的核反应堆蒸汽发生器管接合的方法，所述管束具有壳体，膨胀器和塞顶部，其中 导向部分直径小于钻头直径。 此外，使用钻头移除塞子壳和膨胀器的一部分并将塞顶部留在管中。 可以通过提供夹持器工具将夹具顶部移除，将夹具工具插入管中，将夹持器推靠在插头顶部上，并通过从管中取出夹具来移除插头顶部。