LIFTING DEVICE FOR LIFTING AN UPPER PART OF A SEA PLATFORM
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Accused Products
Abstract
The present invention relates to a lifting device for lifting an upper part of a sea platform, the sea platform comprising a support structure and a top side, the lifting device being constructed to be positioned on a lifting vessel, the lifting device comprising: a base frame constructed to rest on the lifting vessel, at least one console frame connected to the base frame via a flexible connection system, a suspension system connected to the console frame and comprising a leg connector, wherein the suspension system is constructed to allow freedom of movement of the leg connector relative to the console frame, wherein the flexible connection system forms a flexible connection between the console frame and the base frame and allows a predetermined movement of the console frame.
3 Citations
78 Claims
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1-57. -57. (canceled)
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58. A lifting device for lifting a sea platform, in particular an upper part of the sea platform, the sea platform comprising a support structure and a top side, the lifting device being constructed to be positioned on a lifting vessel, the lifting device comprising:
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a base frame constructed to rest on the lifting vessel, at least one console frame connected to the base frame via a flexible connection system, a suspension system connected to the console frame or to the base frame and comprising a leg connector which is constructed to be connected to a leg of the sea platform, wherein the suspension system is constructed to allow freedom of movement of the leg connector relative to the console frame, wherein the flexible connection system forms a flexible connection between the console frame and the base frame and allows a predetermined movement of the console frame relative to the base frame, wherein the suspension system comprises at least one pivotable beam which extends outwardly away from the base frame over a horizontal distance and is pivotable about a horizontal pivot axis relative to the base frame, wherein the lifting device comprises a pivotable beam actuator for pivoting the pivotable beam between an upper position and a lower position, and wherein the lifting device is constructed to be switched from a; load transfer mode in which the flexible connection system and the pivotable beam actuator provide a low stiffness and a low counterforce against a downward pivotal movement of the pivotable beam, to a transport mode in which the console frame and the flexible connection system provide a high stiffness and a high counterforce against said downward pivotal movement of the pivotable beam. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 75, 76, 77, 78)
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72. A lifting device for lifting a sea platform, in particular an upper part of the sea platform, the sea platform comprising a support structure and a top side, the lifting device being constructed to be positioned on a lifting vessel, the lifting device comprising:
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a base frame constructed to rest on the lifting vessel, at least one console mechanism comprising a flexible connection system, wherein the console mechanism extends outwardly away from the base frame over a horizontal distance, a suspension system connected to the console mechanism or to the base frame and comprising a leg connector which is constructed to be connected to a leg of the sea platform, wherein the suspension system is constructed to allow freedom of movement of the leg connector relative to the console mechanism, wherein the suspension system comprises at least one pivotable beam which extends outwardly away from the base frame over a horizontal distance and is pivotable about a horizontal pivot axis relative to the base frame, and wherein the lifting device comprises a pivotable beam actuator for pivoting the pivotable beam between an upper position and a lower position, wherein the lifting device is constructed to be switched from a; load-transfer mode in which the lifting device provides a low stiffness and a low counterforce against a downward pivotal movement of the suspension system, wherein in the load-transfer mode the pivotable beam actuator holds the pivotable beam in the upper position and provides a low stiffness and a low counterforce against a downward pivotal movement of the pivotable beam to a transport mode, in which the pivotable beam is in the lower position, wherein the lifting device provide a high stiffness and a high counterforce against said downward pivotal movement of the suspension system, wherein in the transport mode the flexible connection system forms a flexible connection between the base frame and the suspension system and the console mechanism supports the pivotable beam at an outer support point at a horizontal distance from the base frame against a downward pivotal movement and provides a high stiffness and a high counterforce against said downward pivotal movement of the pivotable beam in comparison with the relatively low stiffness of the pivotable beam actuator and allows a limited movement of the pivotable beam together with the console mechanism relative to the base frame. - View Dependent Claims (73, 74)
wherein the foot engages the support base when the pivotable beam pivots to a lower position, wherein the flexible connection system is activated by the engagement and the lifting device is switched to the transport mode.
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Specification