CONSTANTA, Romania -- GSP Offshore has completed offshore mating of a topsides and jacket for the latest phase of the Akcakoca gas development in the Turkish Black Sea. The project is operated by Turkey’s state-owned Türkiye Petrolleri Anonim Ortaklıgı.
The two-deck topsides were transported to the location in the northwestern Black Sea onboard the semisubmersible heavy-lift transport barge GSP Bigfoot 2. Installation was performed by the heavy-lift crane vessel GSP Neptun, moored alongside the accommodation and work barge GSP Bigfoot 3, and the spacer barge P4.
After removing the welded seafastening, the steel dual-deck structure was lifted from the GSP Bigfoot 2 and GSP Neptun lowered the topsides and stab cones into piles of the 101 m (331 ft) high steel jacket.
The jacket had earlier been secured to the seabed following a foundation pile and conductor installation, grouting operation (the main and the skirt piles being grouted to the jacket), and pile cut-off.
Other vessels involved in the operation were the ROV support vessel GSP Queen, the supply ship GSP Licorn, and the anchor handler Agat.
In the Bulgarian offshore sector, the diving and ROV support vessel GSP Prince is performing the pre-lay subsea survey as part of an offshore pipelay contract for Melrose Resources’ Galata field development.
GSP Bigfoot 1, the pipelay and heavy lift barge, is due to sail from Constanta Port towards the location on Sept. 1.
GSP is general contractor responsible for engineering, procurement, fabrication, and installation of an 8.5-km (5.3-mi), 6-in. (15-cm) pipeline from the Galata platform to the Kavarna 2 wellhead, and another 14.5 km (9-mi), 10-in. (25-cm) pipeline from the same platform to the Kaliakra 2 wellhead, plus associated piggy backed liquid lines. Water depth along the routes averages 80 m (262 ft).
Akcakoca topsides in place
GSP Offshore has completed offshore mating of a topsides and jacket for the latest phase of the Akcakoca gas development in the Turkish Black Sea.