Mooring systems

B - Operations – Transporting – 63 – B

Patent

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Details

B63B 22/02 (2006.01) B63B 21/00 (2006.01) B63B 27/34 (2006.01)

Patent

CA 2211251

A mooring system for the mooring of a tanker or production vessel at an offshore oil production site comprises a plurality of anchor lines, for example four (1,2,3,4), each having a sea-bed anchor at its distal end, an anchor line assembly unit (5) through which passes at least one (2,3) of the anchor lines and to which each of the other anchor lines (1,4) is secured at its proximal end, a swivel unit (6) to which the proximal end of each passing anchor line (2,3) is attached, and a sub-surface buoyancy device (7) also attached to the swivel unit, each passing anchor line (2,3) having a stop member (12) for limiting the travel of the assembly unit (5) along the line in a direction towards its distal end. A mooring line (8) is also attached to the swivel unit (6), and a messenger line (9) having surface marker buoys (56) for location and pick-up of the mooring is attached to the mooring line. In a loading or production system at least one riser hose (10) is attached to the swivel unit (6) for communication through the swivel unit to a respective continuation hose (11) for connection to the moored vessel.

Cette invention concerne un système d'amarrage pour pétrolier ou navire de production au site d'un gisement pétrolier en mer, système comprenant une pluralité de lignes d'ancrage, par exemple quatre (1, 2, 3, 4), chacune comportant une ancre de fond à son extrémité distale; un dispositif de groupage des lignes d'ancrage (5) dans lequel passe au moins une ligne d'ancrage (2, 3) et auquel est attaché le bout proximal des autres lignes d'ancrage (1, 4), une table tournante (6) à laquelle sont attachées les lignes d'ancrage passantes (2, 3) par leur bout proximal; et un flotteur (7) également fixé à la table tournante, chaque ligne d'ancrage passante (2, 3) comportant une butée (12) servant à limiter le déplacement du dispositif de groupage (5) vers son bout distal. Une ligne d'amarre (8) est également attachée à la table tournante (6) et une vérine (9) à bouées de repérage (56) pour la localisation et le halage à bord de la ligne d'amarre. Dans un système de chargement ou de production, au moins un riser (10) est fixé à la table tournante (6) et raccordé via cette table à un tuyau de chargement (11) du navire amarré à poste.

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