| 摘要 |
The invention relates to an offshore top site system comprising a subsea facility, a floating unit (51) arranged above the subsea facility and at least one transportation line (53, 54) extending between the subsea facility and the floating unit (51). The floating unit (51) has a bottom facing downwards and an outer periphery of the bottom defining a horizontal periphery of a vertical floating unit zone VR. The transportation line (53,54) comprises a catenary riser section (53) has a length of at least about 1500 m and comprises an uppermost end and a top site section (54) with a lowermost end. The catenary riser section (53) and the top site section (54) are in flow connection with each other. The transportation line (53, 54) further comprises a connecting portion (55) preferably arranged within the vertical floating unit zone VF and between the top site section (54) and the uppermost end of the riser section (53). The connection portion (55) is pivotally connected to the floating unit (51). The connection portion (55) is preferably pivotally connected to the floating unit (51) such that at least a major part of pulling force from the riser section (53) is alleviated by the connection to the floating unit (51). |
