Self-orienting subsea flowline tapping arrangement

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 35/00 (2006.01) F16L 1/20 (2006.01) F16L 41/04 (2006.01)

Patent

CA 2300955

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 Figure 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 Figure 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 Figure 4, combines the features and characteristics illustrated in Figures 2 and 3.

L'invention concerne une conduite d'écoulement sous-marine (10) déployée au fond de la mer (S) et dotée de points de raccordement avec d'autres installations sous-marines. Des semelles pour terrain boueux (14A, 14B, 14C) soutiennent les moyeux (16A, 16B, 16C) aux points de raccordement. Selon une variante illustrée à la figure 2, un berceau (22) soutient la conduite d'écoulement (10) pour assurer un mouvement de rotation relative. Des vérins hydrauliques (26) sont reliés à des bras (24) de manière à maintenir le moyeu (16) dans une orientation verticale. Selon une autre variante illustrée à la figure 3, un manchon extérieur articulé (21A) monté sur une semelle pour terrain boueux (14A) reçoit la conduite d'écoulement (10A) pour assurer un mouvement de rotation relative. Une chambre à fluide annulaire ou une pièce en forme de tore (25A) assure l'échange de fluide entre la conduite d'écoulement (10) et le moyeu (16A) relié au manchon extérieur articulé (21A). Une autre variante illustrée à la figure 4 combine les fonctions et les caractéristiques présentées aux figures 2 et 3.

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