Hydrostatic penetration device and tool for the same

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 49/02 (2006.01) E21B 7/124 (2006.01) E21B 19/00 (2006.01) E21B 19/086 (2006.01)

Patent

CA 2272860

A hydrostatic penetration device for placing on and penetration of the seabed comprises a housing (1) with a top cover (2) and a bottom cover (3), and a through-going vertical tool (4) for penetration of the seabed. The hydrostatic penetration device comprises at least one low pressure chamber (5), at least one hydraulic cylinder (6) with a vertically movable piston and piston rod (10) which can be driven to upward and downward movement by a flow of pressurised water from the surrounding water to the low pressure chamber (5), a clamping device (8) which surrounds the tool (4) and is connected to the piston rod (10), and which, during an upward and downward movement of the piston rod can be brought out of and into engagement with the tool respectively, and at least one weight (7) resting on the piston rod, which weight is vertically movable under the influence of the piston rod (10) and is arranged to transfer its weight to the clamping device (8) during a downward movement.

Dispositif de pénétration hydrostatique destiné à être placé sur le fond marin et à pénétrer dans ledit fond, qui comporte un carter (1) doté d'un couvercle supérieur (2) et d'un couvercle inférieur (3), et un outil vertical (4) traversant destiné à pénétrer dans le fond marin. Ledit dispositif comporte au moins une chambre (5) à basse pression, au moins un vérin hydraulique (6) doté d'un piston à déplacement vertical et d'une tige (10) de piston qui peut être entraînée dans un mouvement vers le haut et vers le bas par un flux d'eau sous pression passant depuis l'eau environnante à la chambre à basse pression (5), un dispositif de serrage (8) qui entoure l'outil (4) et est connecté à la tige (10) de piston et qui, pendant un mouvement vers le haut et vers le bas de la tige de piston, peut être respectivement amené en contact avec l'outil et dégagé dudit outil, et au moins un poids (7) qui repose sur la tige de piston, qui est déplaçable verticalement sous l'influence de la tige (10) de piston et qui est conçu pour transférer son poids au dispositif de serrage (8) pendant un mouvement vers le bas.

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