Fossil Energy – Unmooring without AHVs
During a recent operation in the Barents Sea, Transocean’s drilling unit Transocean Enabler was able to unmoor without the need for anchor handling vessels (AHVs) to embark on the long journey to the Barents Sea.
This venture would have entailed significant AHV costs and CO2 emissions, involving three to four vessels and a 10-day voyage from and to Bergen.
However, Vår Energi chose to utilize Delmar System’s hydroacoustic Rig Anchor Release (RAR Plus) connector, a game-changing solution. By simply pressing a button in a pre-defined sequence, the rig was swiftly released from its 10-line mooring spread in just under two hours.
The rig then embarked on an eight-day transit to the next location using its own propulsion. Once the rig arrived at the next location, the nested RAR bodies were removed off any critical path time.
The mooring spread at Goliat was eventually recovered with a single vessel, allowing Vår Energi to be flexible on timing for chartering a vessel.
The substantial savings in emissions and costs extend beyond the AHVs. The efficiency of our RAR Plus quick release meant that only two hours were spent disconnecting the rig, saving significant rig time.
Additionally, with RAR Plus, the wait for favourable weather conditions for unmooring becomes a ‘thing of the past’.