Compensated floating installation

 

Workability increase for floating, in-air installations

The Seaqualize Delta can greatly increase the workability of floating in-air installations, by reducing set downs speeds for delicate loads to max. ~7 cm/s. For example:

  • Keep installing TP's onto MP's even in winter months
  • Competing with jacked installations by standard floating heavy lift vessels

In the video below, we show a typical example of how such an operation works.

Delta 600 Floating installation example: installing a towersection onto a transition piece, using a standard heavy lift vessel

 

Key benefits

Using inline AHC tooling offers full active heave compensation for standard cranes, without the need to make large CAPEX investments.

Delta Functionality Advantages for Floating Installation
Up to 97% heave reduction
    - Fully control you load with very limited residual motions, while the crane hook is heaving
Full active control, in air
    - Setdown speed of max. 7 cm/s / ~0,2G , meeting al fabricator limits for max.setdown requirements
    - Worlds 1st in-line AHC that works in air, without risk of system resonance
    - Reversible:  Mechanical actuation ensures reversible lift and set down action
Combine Active + Passive power
    - Safe operations, even in case of black out: 100% passive support at all times
    - Only ~15% actuation on board required, not allowing for sudden unwanted unsafe movements of the load
Hook based rentals
    - Use only when needed : Turns any standard HLV crane in an in-air AHC crane
    - Stand alone package: easily placed and removed when needed
Low power requirement
    - Battery powered:  No umbilical needed when continuously operating ~3 to 4 hrs
 

>80% workability in winter months, install all year round!

Workability improvement (in %’s) by using the Seaqualize Delta inline AHC, for floating TP installations. Based on Mean Probable Maximum for 3 hr time windows, using a 180m Heavy Lift Vessel

No need to stop in the winter season: we can offer >80% workability almost all year round.

We’re more than happy to customize our workability analyses based on your project details, such as:

  • Project location

  • Vessel details (RAOs) or motion time traces of the crane hook

  • Installation procedure & rigging setup

 

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Operational steps

Advanced simulation allows us to test the Delta in every situation. Below we explain all relevant operational steps using these simulations

While the crane is heaving up and down, the load is first stabilized using active motions compensation, than it is lowered to contact with the fixed platform, after which it is set down.

 
 
 
 
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Motion compensation

The Seaqualize Delta inline AHC tooling can be placed in any standard Heavy Lift Crane. It is battery powered so no umbilicals are required.

Heave compensation ensures the load hangs nearly still in the vertical direction.

  • Up to 97% heave reduction

    • Easy positioning over guides

    • Controlled movements

    • Wave independent timing gives full flexibility to time placement

 
 
 
 
 
 
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Lower to contact

After approaching the landing target using standard crane maneuvers, the final approach can be done through the tool, or still by the crane driver.

  • controlled set down

    • Max. 7 cm/s (~0.2G) set down speed

    • No accidental re-lift after set-down

    • If needed: mechanically re-lift the load and replace for better alignment

 
 
 
 
 
 
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Setdown

Once the placement is correct, the tool can either gradually reduce the load, or the crane drive can simply hoist down until the rigging is slack and the load can be released.

The tool can then directly be deployed for the next lift, or to lift a different payload, quickly reset in its holding frame.

 
 
 
 
 

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