Safe and efficient offshore wind installations

Proven technology through nearly 1000 projects ensures trouble free operation. Installation of monopiles, jacket foundations, transition pieces and wave energy devices are some of the projects we have been involved in.

Cranemaster Benefits

  • Increased weather window –makes sure projects are finished on time

  • Cost effective – easy installation and can be added to existing systems

  • Increased safety – protects both personnel, crane and load

Typical applications where Cranemaster can benefit include

  • Lift-off from barges (feeding). Cranemaster® will reduce DAF and therefore increase the operational weather window.
  • Splash zone crossing of large objects (monopile templates, mono buckets, jacket foundations with suction buckets). Cranemaster® will reduce DAF and reduce probability of slack slings.
  • Installation of transition pieces (TP) on monopoles from floating vessels. Cranemaster® will increase ship stability and prevent rapid heeling.
  • Pile runs or pile drops – protection of crane and rigging against snap loads during piling.
  • Subsea landing and subsea re-positioning or recovery of heavy objects.

Protection of crane and rigging during pile hammering

Reducing risk in piling operations

Sudden free fall of the piles during pile hammering due to layering in the soil, so called pile runs / 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.

In cooperation with key players in the industry, Cranemaster has developed special shock absorbers that will reduce the snap loads to  acceptable levels. As a result, risk is reduced, and expensive interruptions in the piling process avoided.

references-rampion-pilehammering-pilerunprotection-offshorewind

Pile run with and without Cranemaster®

This simulation shows a pile hammer, 300 ton weight in air. The hammer falls a distance of 0,8 meter and is then stopped by the crane wire.

With Cranemaster®:
• Snap load = 513T
• Ringing eliminated

Without Cranemaster®:
• Snap load = 964T
• Significant ringing effect in crane and pile hammer

Examples of pile runs / pile drops

Safe deployment of large objects through the splash zone

By utilizing Cranemaster, dynamic forces and probability of slack slings will be reduced when lowering large objects through the splash zone (e.g. monopile templates, mono buckets, jacket foundations with suction buckets).

The images is from an installation of large met masts in the North Sea. The structures had a height of 45 meters and weights of 300-400 ton. Cranemaster performed calculations and lift simulations in close cooperation with the customer. Due to the large suction bucket, the splash zone crossing was a challenge with respect to dynamic forces and stability. Utilizing Cranemaster, these challenges were overcome, and the structures were successfully installed.

Increased ship stability during installation from floating vessels

Installation  from floating vessels can be challenging (e.g. installation of transition pieces on monopiles). With a Cranemaster® unit equipped with Lock & Release functionality, vessel heeling is controlled, and snap loads are eliminated.

Cranemaster® units with SWL of 250 ton were used during the Greater Gabbard Offshore Wind Farm project.

Reduced downtime when offloading from barges (feeding)

Efficient and safe lift-off operations of offshore wind components from barges or feeder vessels. By adding a Cranemaster unit to the jack-up crane, the heave challenge is solved as the unit will compensate for the wave induced motions from the barge. Enables operation in harsher weather conditions.

Cranemaster for subsea operations

Smooth seabed landings and re-positioning or recovery of heavy objects.

Engineering services – mitigate risk & maximize efficiency

The Cranemaster engineering department offers a wide variety of services, from weather window calculations and heavy lift analysis to tailor made systems and designs. In close cooperation with the customer, we will give you a clear view of movements, velocities and forces in crane, load and rigging for all critical phases of the operation.

Featured References – Renewables

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