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Applications2018-08-28T10:46:04+00:00

Application Areas

Shock Absorption

Enables operations in harsher weather conditions.

Splash Zone Crossing

Reduction of dynamic forces in crane and payload trough the splash zone.

Pile Run Protection

Reduced risk in piling operations.

Subsea Landing

Securing smooth landing of subsea structures.

Load Chart Improvement

Reduce cost by minimizing rig downtime.

Tension Control

Absorption of forces in crane and wire.

Subsea Retrieval

Safe and efficient recovery of subsea objects. Constant tensioning system, with dampening once the object is loose from the sea floor.

Resonance Avoidance

Avoidance of uncontrolled dynamic forces and escalating movements of load during deep water operations.

Shock Absorption

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Shock absorption offshore lifting

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Splash zone crossing

Splash Zone Crossing

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Pile Run Protection

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Pile run protection offshore wind installation cranemaster shock absorber

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Subsea landing speed reduction

Subsea Landing

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Load Chart Improvement Cranemaster crane hook rig lift-off shock absorber

Load Chart Improvement

Operational Challenges

  • Reduced lifting capacity at increasing wave heights.
  • Potential damage to rig crane and load due to dynamic forces at high sea states.

Cranemaster Benefits

  • 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.
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Tension control offshore crane

Tension Control

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Subsea Retrieval

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Subsea retrieval wreck removal salvage operation

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Resonance Avoidance

Operational Challenges

  • 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.

Cranemaster Benefits

  • 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.
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Subsea resonance avoidance

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