| 摘要 |
<p>An apparatus is disclosed for attaching and sealing to the upper end of the casing (B) allowing the inner string (C) to be run through the apparatus. The apparatus provides a latch (25) for anchoring the inner string and a seal (24) for sealing on the inner string. Also disclosed is a flow path (4) for providing for circulation of fluid between the inner string and casing annulus. Also disclosed is an inner string sub (42) that provides a profile anchoring and sealing the inner string by the apparatus.</p> |
