Apparatus for near vertical laying of pipeline

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 1/18 (2006.01) B63B 35/03 (2006.01) F16L 1/19 (2006.01) F16L 1/20 (2006.01) F16L 1/225 (2006.01)

Patent

CA 2129867

An apparatus for near vertical laying of pipeline offshore. A support base and framework on a lay vessel support an alignment tower that extends upwardly from the base and is designed to support the pipe joint to be added to the pipeline. A support tower that supports the weight of the pipeline is attached to the support base such that the support tower extends downwardly therefrom into the water. A travel block is adapted for movement along the length of the tower for raising or lowering the pipe and pipeline. A pedestal that is movable between open and closed positions for receiving a pipe section from the travel block and supporting the weight of the pipeline is positioned near the bottom of the tower. A strongback or boom may be used to grasp a pipe joint from a ready rack and transfer the pipe joint into the alignment tower for addition of the pipe joint to the pipeline. The extension of the support tower into the water eliminates the need for a stinger. The attachment position and extension of the support tower into the water also lowers the center of gravity of the apparatus.

Dispositif pour la pose quasi verticale de canalisations en mer. Une base de support et une charpente sur le navire poseur de canalisations portent une tour d'alignement qui pointe vers le haut à partir de la base et qui est destinée à supporter le joint de tuyaux à ajouter à la canalisation. Une tour de support qui porte le poids de la canalisation est fixée à la base de support de sorte qu'elle pointe vers le bas à partir de là dans l'eau. Un moufle est adapté de manière à se déplacer sur la longueur de la tour pour lever ou descendre le tuyau et le pipeline. Un socle qui peut être déplacé de la position ouverte à la position fermée de manière à recevoir une section de tuyau provenant du moufle et soutenir le poids du pipeline se trouve près de la base de la tour. Une traverse ou une flèche peut servir à saisir le joint de tuyaux dans un ratelier et à le transporter dans la tour d'alignement pour qu'il soit ajouté à la canalisation. Le prolongement de la tour d'alignement dans l'eau élimine le besoin d'utiliser un guide. La position de fixation et le prolongement de la tour de support dans l'eau permettent aussi d'abaisser le centre de gravité du dispositif.

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