Cranemaster supported Geocean’s anchor pile installation for the Marine XII FLNG project offshore Congo by delivering a versatile CM3-400T-4200 unit, expertly adapted across three phases to ensure safe and efficient subsea and heavy-lift operations.
In the demanding marine environment off the coast of the Republic of Congo, Geocean led the anchor pile installation for the FLNG mooring system under the Marine XII project.
Cranemaster played a vital role across different phases of this complex offshore operation by supplying a single, highly adaptable CM3-400T-4200 unit equipped with our advanced CMAC control system.
The same Cranemaster unit was reconfigured for two distinct lifting applications:
Phase 1 – Pile Handling: The Cranemaster unit was configured in quick-lift mode during the upending and deck lift-off of the pile to prevent reentry of the pile and casing onto the deck. Following installation, the unit operated as a passive heave compensator to ensure smooth and controlled landing of the casing back onto the deck.
Phase 2 – Yoke Installation: With limited rigging height on the HLV, the Cranemaster unit was remotely operated and used in a lock-and-release setup. Once the yoke reached the vessel side, it was released, functioning as a passive heave compensator to prevent snap loads and minimize dynamic loads through the splash zone.
Our on-site technicians, Bjørn-Erik Svensen and Saamund Velta were key to the reconfiguration and real-time oversight, which included remote operation or the unit, ensuring smooth adaptation of the unit across all phases.
The CMAC (Cranemaster Adaptive Control) system made this flexibility possible. By automatically adjusting damping performance based on real-time load and motion conditions, CMAC delivered consistent energy absorption and improved control—enhancing both safety and operational uptime.
This operation brought together multiple marine assets: a Jack-Up Barge for pile positioning, a supply vessel with a up-ending frame, an HLV transporting and installing core components like the yoke and riser, and real-time monitoring via ROVs and divers.
Cranemaster’s contribution helped extend the operational weather window and reduce risks during each phase of this highly complex operation.
About the Unit: CM3-400T-4200 with CMAC – a high-capacity, passive heave compensator with smart, adaptive damping for both constant tension and quick-lift applications.
