| 摘要 |
<p>A method and apparatus for running, operating, and retrieving packoffs, bowl protectors, casing heads, casing hangers, and other well tools employed in drilling and completing subsea wells. Broadly considered, the method involves running the well tool and a special running and retrieving tool to which it is releasably connected into the well by means of a drill or other pipe string and then pressurizing the wellhead through the choke and kill lines to actuate the running and retrieving tool and release it from the well tool for subsequent retrieval and re-use. Various embodiments of the running and retrieving tool are described. -1a-</p> |
