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Lifting device for a fixed offshore structure, system and method of installing a fixed offshore structure with a lifting device
Apparatus for raising and lowering a platform, e.g. an offshore oil rig deck, using clamping rings with fluid fillable e.g. inflatable chambers. A lifting device 5 for achieving relative movement between a platform 3 and a leg 4, having 1st and 2nd fastening devices 40,50 comprising respective 1st and 2nd locking means 12, 18 each having inflatable bladders 14, 20, which are pressurised for immobilising a leg relative to a fastening device by pressing on a smooth outside surface of a leg, e.g. via shoes 16, 22, and depressurised to allow sliding of a leg, the 1st fastening device having a fastening means 9 for mechanically connecting it to a platform in use, a translational movement means e.g. jacks 7, for moving the 1st fastening device relative to the 2nd, each fastening device forming a mechanical assembly 13,19 comprising pairs of sub-assemblies 26,28 configured to be assembled together around a leg, in use, by demountable fastening means 27,37, each fluid fillable member comprising at least two part circular/ half-moon/ C shaped fillable chambers, each sub assembled receiving a chamber. The jacks and fillable members may be hydraulic or pneumatic.
Lifting device for a fixed offshore structure, system and method of installing a fixed offshore structure with a lifting device
Apparatus for raising and lowering a platform, e.g. an offshore oil rig deck, using clamping rings with fluid fillable e.g. inflatable chambers. A lifting device 5 for achieving relative movement between a platform 3 and a leg 4, having 1st and 2nd fastening devices 40,50 comprising respective 1st and 2nd locking means 12, 18 each having inflatable bladders 14, 20, which are pressurised for immobilising a leg relative to a fastening device by pressing on a smooth outside surface of a leg, e.g. via shoes 16, 22, and depressurised to allow sliding of a leg, the 1st fastening device having a fastening means 9 for mechanically connecting it to a platform in use, a translational movement means e.g. jacks 7, for moving the 1st fastening device relative to the 2nd, each fastening device forming a mechanical assembly 13,19 comprising pairs of sub-assemblies 26,28 configured to be assembled together around a leg, in use, by demountable fastening means 27,37, each fluid fillable member comprising at least two part circular/ half-moon/ C shaped fillable chambers, each sub assembled receiving a chamber. The jacks and fillable members may be hydraulic or pneumatic.
Lifting device for a fixed offshore structure, system and method of installing a fixed offshore structure with a lifting device
RAPHAËL DAUPHIN (author) / NICOLAS FROUIN (author) / HENRI-JACQUES WATTEZ (author)
2023-09-13
Patent
Electronic Resource
English
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau