Method and apparatus for suction anchor and mooring...

E - Fixed Constructions – 21 – B

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E21B 7/12 (2006.01) B63B 21/22 (2006.01) B63B 21/27 (2006.01) B63B 21/50 (2006.01) E02D 5/80 (2006.01)

Patent

CA 2331176

A method for deployment of mooring systems for mobile offshore drilling units and for connecting the same to the mooring lines (76) thereof. An anchor handling vessel (10) having a stern roller (12), one or more suction anchors (70), a deployment connection (73) and a mooring connection (88). The anchor handling vessel has an anchor deployment mechanism incorporating a handling line having a quick-disconnect socket connector (74) for accomplishing movement of the suction anchor over the stern roller to the sea bottom. After deployment of the suction anchor, the handling line is disconnected from the connection and the anchor handling wire (78) is moved from the deployment connection to the mooring connection for mooring the suction anchor to the offshore drilling unit. A plurality of mooring strings are deployed in this matter to properly station the drilling unit.

L'invention concerne un procédé de déploiement de systèmes d'amarrage pour unités de forage en mer mobiles et de raccordement de ces derniers à des lignes d'amarrages (76) de ceux-ci. Un vaisseau de mouillage (10) comprend un tambour arrière (12), une ou plusieurs ancres à aspiration (70), un raccord de déploiement (73) et un raccord d'amarrage (88). Le vaisseau de mouillage est constitué d'un mécanisme de déploiement d'ancre à ligne de retenue intégrée, doté d'un raccord (74) à dégagement rapide qui suit le mouvement de l'ancre à aspiration sur le tambour arrière par rapport au fond de la mer. Après le déploiement de l'ancre à aspiration, la ligne de retenue est désacouplée du raccord et le câble (78) de maniement de l'ancre est déplacé du raccord de déploiement au raccord d'amarrage, de sorte que l'ancre à aspiration puisse être ancrée à l'unité de forage en mer. Plusieurs tiges d'amarrage sont ainsi déployées, de sorte que l'unité de forage soit immobilisée correctement.

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