The Seaqualize
Heave Chief

Workability increase: work in higher seas all year round

Hook based active heave compensation reduces heave motions and set down-velocities by up to 95%. This allows shorter and better plannable installation campaigns:

• Less waiting on weather days

• Work longer into the heavy weather winter seasons

• Faster and safer operations due to increased set-down control

The Seaqualize Delta can offer up to ~20-40% workability increase, especially in the demanding North-Sea.

Would like to analyze the potential workability increase for your operation in a particular location? Reach out to us, and we are more than willing to help using our in-house workability software.

Performance benefits of the Seaqualize Delta

Increased control over in-air heavy load

• Geostationary load: up to 95% motion reduction results in heavy loads that can be kept virtually motionless during in-air lifts while the crane vessel is subjected to sea states of Hs 2,5 to 3.0

• Internal controls: Internal tool actuation controls for precise positioning and monitoring, fully parallel to standard hoist controls

increased control in load set-down phase

• Slow set down: Set down velocities of 5 to 7 cm/s while in Hs 3.0 conditions

• Accidental lift-off protection: 1,5m free stroke to prevent accidental lift-off under all circumstances

• Snag load protection: the Delta tool absorbes any load shocks that may occur during the set-down phase, protecting the crane while increasing it’s load capacity

• Increased load handling window: Guarantee longer period during which load is set-down but still ready for quick lift-off

Increase safety in heave compensated operations

• No unintended actuation: Small actuation system (10% of full load) is incapable of provoking undesired load motions

• Full passive load control: Passive system keeps the load fully balanced and under control for prolonged periods during any major system failure

Continuous, safe operation for lifting loads from feeder barges

• Continuous operation: no need to waste critical time by taking the tool back to the deck, for re-charge or to change settings. Keep on lifting cargo from the feeder barge until its empty, regardless of varying loads

• Safe handling: tool can adjust to any constant tension setting, for example to check the rigging, and switch to fully passive compensation for longer times when needed

• Reduced DAF: tool can gradually introduce weight, keeping DAF < 1.1

Technical specifications
Heave Chief 750 & 1100

The Heave Chief is the first in-line heavy lift heave compensator with Seaqualize BHC technology. It is designed as a fully flexible tool that can be placed in any crane hook, and compensate heave motions up to ~95%. It has internal controls to allow for delicate set-down and pick up of loads.

HC750

• SWL: 750 mT

• Resulting DAF: < 1.1

• Effective tool height under hook: 2.5 m

• Absolute tool height: 9.5 m

• Speed: 0,5 m/s

• Weight: 125 mT

• Stroke: 2,5m

• Fully electrically powered (battery or umbilical), ~30kW

• Usable in every crane hook, no adjustments or additions to crane needed

• Mobilization times < 1 day

• Certification: DNVGL-0378 Lifting appliance

HC1100

The HC1 100 will be delivered around April 2023 and will have upgraded specifications compared to the HC750. Its design is more focussed on easy feeder barge lifting, facilitating a single lift point at the bottom of the tool. Compared to the HC750, the changed performance specifications are:

• SWL: 1100 mT

• Weight: 150 mT

• Stroke: 3,5 m

• Speed: 0,7 m/s

Prototyping timeline