Self-orienting subsea flowline tapping arrangement

Details Self-orienting subsea flowline tapping arrangement Self-orienting subsea flowline tapping arrangement

1998-09-09

1999-12-21

Taylor, Dennis L.

Hydraulic and earth engineering

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

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

166343, 285 31, 405171, 405158, F16L 104, F16L 3500

Patent

active

060040726

ABSTRACT:
A subsea flowline (10) deployed onto the sea floor (S) has tie-in points for interfacing other subsea facilities. Mudmats (14A, 14B, 14C) support hubs (16A, 16B, 16C) at the tie-in points. One embodiment shown in FIG. 2 has a cradle (22) supporting flowline (10) for relative rotative movement. Hydraulic jacks (26) are connected to arms (24) to position and maintain hub (16) in a vertical orientation. Another embodiment, shown in FIG. 3, has an outer swivel sleeve (21A) which is mounted on mudmat (14A) and receiving flowline (10A) for relative rotation. An annular fluid chamber or toroid (25A) provides fluid communication between flowline (10) and hub (16A) connected to outer swivel sleeve (21A). Another embodiment, shown in FIG. 4, combines the features and characteristics illustrated in FIGS. 2 and 3.

REFERENCES:
patent: 320771 (1885-06-01), Cunningham
patent: 481935 (1892-09-01), Dunham
patent: 666316 (1901-01-01), Kenneally
patent: 3603617 (1971-09-01), Lochridge
patent: 3781041 (1973-12-01), Petzetakis
patent: 5018903 (1991-05-01), O'Donnell et al.
patent: 5033907 (1991-07-01), O'Donnell et al.
patent: 5044672 (1991-09-01), Skeels et al.
patent: 5056755 (1991-10-01), Jang et al.
patent: 5131697 (1992-07-01), Shumway

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