The Jacking system is used in the self elevating platforms. Hydraulic power packs are installed on deck and power the up and down movements of the spuds. Moreover, they can be connected to equipment such as mooring winches. The jacking mechanism is provided with heavy hydraulic cylinders and moveable cross heads.
The system operates on smooth circular legs which minimize wave, wind and current forces both in elevated, transit and installation conditions with their beneficial hydrodynamic and aerodynamic characteristics.
The circular leg guides in the hull and jack-house ensure proper guidance of the legs with hardly any wear. For protection against mechanical damage and environmental hazards the jacking system is enclosed inside a jack-house.
The system design is arranged such that in case of a defect the jacking operations can be continued at reduced speed.