Floating installation

To keep a heavy load still, in-air, while the cranehook is heaving up and down, is one of the holy grails of offshore heavy lifting. Seaqualize offers full Active Heave Control, to be placed independently in any standard lifting crane, and can be combined with XY control.

AHC cranes; not good enough

Our client was looking for a solution to improve the workabiliy for installing transition pieces (TPs) onto monopiles, using their floating heavy lift vessel. The TP's had to keep a steady vertical position, as otherwise the TP flange might slip off the guiding pin that ensures the right rotation of the TP. The active heave functionality of the vessel crane was not accurate and safe enough, so they were looking for a device specifally for this operation. Seaqualize offered that functionality, on a rental basis, and could combine it with feeder functionality in the same operation.

“Got to be one of the best ideas I´ve ever seen in heavy lifting, as complex as these lifts are” - Client lifting supervisor

Our Heave Chief 750, was used to install ~600mt TP's for the installation of TP's on the CVOW project. Based on the internal MRU in our machine, we could keep the TP's still to within +/-20cm, even in waves of Hs 2.0m. This way, the crew could keep installing, even in winter conditions from November till March. On this project, passive bumpers were used for horizontal allignment, but on future project, the next generation HC's by Seaqualize, will be able to dampen XY pendulum swing motions as well, making installation even simpler, safer and quicker.