Safe and efficient recovery of subsea objects. Constant tensioning system, with dampening once the object is loose from the sea floor.
- Dynamic load on crane or load at lift-off for lifts in air.
- Limited operational weather window because of harsh weather conditions.
- Any operation where peak loads may arise, in air and subsea.
- Potential re-entry of load being lifted represents a significant risk.
- Increasing the operational weather window of the lifting operation.
- Protection of crane and lifted structure in all lifting phases by reducing the dynamic amplification factor (DAF).
- Immediate response to potential dangerous loads.
- Enabling crane to maintain its lifting capacity at increased wave height.
Featured References – Shock Absorption
- Limited operational weather window due to dynamic loads.
- Large forces on structures during crossing, especially complex structures and structures with large horizontal surfaces (e.g. manifolds).
- Crossing of structures with large variation between weight in water and air.
- Reduction of dynamic force in payload and lifting points during splash zone crossing.
- Reduction of dynamic load on the crane tip and the hoisting system.
- Reduction of probability of slack wire during splash zone crossing.
- For critical applications, CAST – Cranemaster® Advanced Splash Zone Tension Mode will give unsurpassed performance in terms of low DAF and superb ability to avoid slack slings even for large objects and high waves.
Featured References – Splash Zone Crossing
- Sudden free fall of the piles during pile hammering due to layering in the soil, so called pile runs or pile drops, is an increasing concern in the industry.
- The snap loads following pile runs can be very high, exposing both personnel and equipment to high risk.
- Protection of crane and rigging against snap loads during piling.
- Expensive interruptions in the piling process can be avoided.
- Special Cranemaster® shock absorbers developed in cooperation with key players in the industry.
Featured References – Pile Run Protection
- Limited operational weather window to reach required vertical landing speed.
- Structures with landing speed limitations. Exceeding these might cause overstress within the structures.
- Landing of structures with tight angular tolerance.
- Rapid heeling of vessel during landing of heavy loads.
- Reduction of landing speed.
- Possibility to maintain tension in wire during landing phase.
- Reduction of peak loads in case of re-lifting.
- Prevention of rapid heeling of vessel during landing of heavy loads.
Featured References – Subsea Landing
- Reduced lifting capacity at increasing wave heights.
- Potential damage to rig crane and load due to dynamic forces at high sea states.
- Increased rig utilization through improved operability.
- Increased weather window for your lifting operations.
- Lifting capacity maintained despite increasing wave heights.
- Protection of crane, rigging and load at lift-off.
- Easy mounting and handling.
- Smooth and efficient crane operator experience.
Featured References – Load Chart Improvement
- Rapid heeling of vessel during installation of heavy objects.
- Instability between touch-down and fastening.
- Suction forces combined with vessel movements creating large dynamic forces in crane and wire.
- Keeping tension during sawing and cutting.
- Constant tension despite vessel movements.
- Fail safe constant tension functionality.
- Works as a constant tension system, but with added dampening preventing abrupt movements.
- Overload protection.
Featured References – Tension Control
- Retrieval of objects from the sea floor may cause large forces in the crane and wire due to a combination of vessel movement and suction forces.
- Absorption of forces in crane and wire, preventing direct coupling between load and boom-tip movement.
- Works as a constant tensioning system, but with added dampening once object is loose from the sea floor.
- Overload protection during removal.
Featured References – Subsea Retrieval
- When the wave period of the surface waves, and thus the frequency of the heave, generate boom tip movements which correspond to the system frequency of the load and wire.
- The heave creates resonance movements in the subsea load and wire with destructive energy.
- Uncontrolled dynamic forces and escalating movements of load during deep water operations avoided.
- With Cranemaster® included in the rigging, system resonance period will be increased.