| 摘要 |
A liner assembly which comprises: (a) a liner (3); (b) a non-return valve at or adjacent the downstream end of said liner (3); (c) a liner hanger assembly (5) at or adjacent the upstream end of said liner (3); (d) a running tool (9) releasably connected to said liner hanger assembly (5); and (e) a plug (10) at or adjacent the upstream end of said liner (3) and defining with said non-return valve (4) and said liner (3) an isolated space (16), said plug (10) having a unit (13, 14) which can be acted upon to allow fluid to pass into said isolated space (16).
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