| 摘要 |
Swivel assembly for installation at a well for subsea production of oil or gas, and adapted to be connected to a production vessel at the sea surface, comprising a main or fluid swivel having at least two paths (21, 22) and an electric/hydraulic auxiliary swivel (28) for signal communication and power transfer. The fluid swivel is provided with a rotatable swivel housing (24) at the top of a stationary christmas tree (50), preferably comprising a small number of valves, such as a production master valve (51) and an annulus master valve (52). Said paths (21, 22) are through-running vertically in the central core member (25) of the fluid swivel so as to make possible well intervention from the upper side of the fluid swivel.
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