Subsea pipeline connection

Details Subsea pipeline connection Subsea pipeline connection

1983-12-22

1986-05-13

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Submerging, raising, or manipulating line of pipe or cable...

166338, 405168, F16L 104

Patent

active

045883262

ABSTRACT:
A method and apparatus are provided for connecting an offshore pipeline or flowline bundle to a deepwater subsea structure and then laying away from the structure. The pipeline or flowline bundle is deployed from a pipelay vessel while connected via a pullcable to a riser deployed from a drilling ship to make a connection with the subsea structure. The connection operation is facilitated by a remotely operated connection tool deployed at the end of the riser, which contains a winch for hauling in the pullcable, as well as other mechanisms for securing the pipeline or flowline bundle to the subsea structure. The connection procedure comprises simultaneously lowering the pipeline or flowline bundle and the riser/connection tool to a position near the seafloor, then landing and securing the connection tool onto the subsea structure, then pulling up the pipeline or flowline bundle and securing it to the subsea structure, and finally recovering the connection tool to the surface as the pipeline or flowline bundle is laid away from the subsea structure.

REFERENCES:
patent: 3219118 (1965-11-01), Lewis
patent: 3260270 (1966-07-01), Watkins et al.
patent: 3298092 (1967-01-01), Dozier et al.
patent: 3352356 (1967-11-01), Wakefield
patent: 3373807 (1968-03-01), Fischer et al.
patent: 4225270 (1980-09-01), Dareing
patent: 4277202 (1981-07-01), Archambaud et al.

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