Vessel with a disconnectable riser supporting buoy

B - Operations – Transporting – 63 – B

Patent

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Details

B63B 21/04 (2006.01) B63B 21/50 (2006.01) B63B 22/02 (2006.01)

Patent

CA 2216047

The invention relates to a vessel which is attached to the sea floor by at least one anchor line. A riser support buoy (9) is releasably connected to the vessel. The anchor line or anchor lines are attached to the vessel outside the area of the riser support buoy (9) such that the buoy can be detached from the vessel independently from the attachment of the anchor lines. By releasing the riser support buoy while maintaining the anchor lines in place, the buoy can be released for maintenance purposes, inspection of the buoy body or the riser without the vessel going adrift. Also are the forces between the vessel and the buoy reduced as the anchor lines are not attached to the riser supporting buoy. The riser supporting buoy may be provided with stabilisation lines (45, 45') which on one end comprise a ballast weight (46, 46').

Cette invention concerne un corps flottant relié au fond de la mer par au moins une chaîne d'ancrage. La bouée de soutien (9) d'une colonne montante est rattachée de manière non permanente à ce corps flottant. La (ou les) chaîne d'ancrage est reliée à ce corps flottant à l'extérieur de la zone de la bouée de soutien (9) de la colonne montante pour qu'on puisse détacher cette bouée du corps flottant sans que cela influe sur son rattachement aux chaînes d'ancrage. En libérant ainsi la bouée de soutien de la colonne montante tout en laissant les chaînes d'ancrage en place, il est possible de libérer la bouée, pour satisfaire aux exigences de son entretien et inspecter la bouée ou la colonne montante, sans que le corps flottant parte à la dérive. Les forces s'exerçant entre le corps flottant et la bouée sont également moins importantes lorsque les chaînes d'ancrage ne sont pas reliées à cette bouée de soutien. Cette dernière peut aussi être équipée de lignes de stabilisation (45, 45') munies d'une masse de lestage (46, 46') à l'une de leurs extrémités.

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