公开(公告)号：US20010001419A1

公开(公告)日：2001-05-24

申请号：US09166379

申请日：1998-10-05

申请人： Michael P. Hartmann

发明人： TIMOTHY J. ALLEN

IPC分类号： E21B033/03 ,  F16L025/00

CPC分类号： E21B33/035 ,  E21B2033/005

摘要： A tubular connection, an example of which is a subsea wellhead having a primary and secondary seal areas allows the use of a backup or contingency gasket for engagement with the secondary seal area in the wellhead should a failure occur in the primary seal area. In the preferred embodiment, the primary and secondary seal areas are sufficiently separated such that the erosion damage which occurs from leakage with the original gasket adjacent the primary seal area, which can spread below the primary seal area, leaves the secondary seal area unaffected. A backup or contingency gasket can be inserted for sealable contact with the secondary sealing area for further well operations.

摘要翻译： 管状连接件，其一个例子是具有主密封区域和次密封区域的海底井口，如果在主密封区域中发生故障，允许使用备用或应急垫圈与井口中的次级密封区域接合。 在优选实施例中，主密封区域和次密封区域被充分地分离，使得与可能扩展到初级密封区域下方的初始密封区域邻近的初始密封垫圈的泄漏发生的侵蚀损伤使得次级密封区域不受影响。 可以插入备用或应急垫片以与二次密封区域进行密封接触，以进一步进行井的操作。