| 摘要 |
There is disclosed subsea well equipment in Which an inner wellhead housing is lowered into and landed in the bore of an outer wellhead housing in order to install an inner casing string suspended from the inner housing within an outer casing string to which the outer housing is connected. The inner housing is locked down in the bore of the outer housing by a locking part on the inner housing which is forced into a locking recess in the bore in order to preload the connection between the housings. An assembly releasably connectable to the inner housing is provided for lowering the inner housing in the landed position and then locking it down within the bore of the housing in response to manipulation of a pipe string from which the assembly is suspended.
|
