The vessel was resting at the sea bottom in approximately 52 meters of water.SMIT Salvage conducted a complete diving survey prior to removing the vessel’s bunker oil and pollutants. In the morning of 6 December 2006 semi submersible vessel Mighty Servant 3 developed a list and sank off the port of Luanda, Angola, after the offloading of drilling platform Aleutian Key. Project Salvage operation, Mighty Servant 3 Provide QHSE management for Boskalis’ scope. Provide engineering support during the offshore umbilical installation, including burial. Mobilize and demobilize all installation spreads for Boskalis’ scope. Pull-in at L6-B & L8-P4 platforms – direct from vessel as part of SIM-OPS. Crossing 36-inch live gas pipeline Callantsoog. Umbilical load-out at DUCO Newcastle (UK) onto the installation vessel Ndurance. Define umbilical length together with the client.
Perform route engineering and installation engineering to optimize the performance of the installation scope, including a detailed burial assessment study (BAS). Survey work, including a pre-burial, as-laid and post-burial survey. SCOPE OF WORK Prepare project planning for Boskalis’ scope of work. Burial scope of single pass burial of umbilical minimum requirement of 1m TOC (top of cover). Stepped phase process of pull-in, laying and burial ops. Fast-track project, with a short lead-time between award and installation – Feb 2014, July/Aug installed. FACTS AND FIGURES Water depth 30-35 meters Challenging North sea conditions. The umbilical will be installed from L8-P4 - first end with pull-in to topside deck via a J-tube, laid in corridor separate from the 8-inch pipeline between L8-P4 and L6-B. The umbilical was connected/pulled in to L6-B via a J-tube and internal conductor to the L6-B topside - TUTA. Both platforms are located in Dutch territorial waters in the North Sea. The umbilical was installed from L8-P4 first end to second end pull-in at L6-B remote end.
The umbilical supplies all the necessary input data, control and feedback to eliminate the usual day-to-day requirement of direct human contact. The umbilical forms the entire link between the remote platforms, supplying and controlling all functions and ensuring continual feedback and monitoring of L6-B.
Utilising a dry-tree design, all control, power and metered injection for the two wells will be via the 19.5-km control umbilical between the new satellite platform L6-B and the operational gas platform L8-P4. L6-B is a remote and unmanned gas well unit. installed a new remote platform at L6-B as a gas production tie-back to L8-P4. Provide engineering support during the offshore umbilical installation, including simultaneous burial. Umbilical lay and bury scope – minimize on seabed exposure. Pull-in at RAVN & A6-A platforms – direct from vessel as part of SIM-OPS. Crossing 36- & 40-inch live gas pipelines. Installation and hang-off of umbilical termination heads – topsides. Umbilical load-out at Hartlepool (UK) onto the installation vessel Ndurance. Perform route engineering and installation engineering to optimize the performance of the installation scope, including Orcaflex analysis for laying, pull-ins, loads and dynamics, as well as a detailed burial assessment study (BAS). Survey work, including post-burial survey. RAVN - first end with pull-in to topside deck via a J-tube - was laid in corridor separate from the 8-inch pipeline between RAVN and A6-A and second end pull-in using the quadrant method at the A6-A platform. The umbilical was connected/pulled into RAVN via a J-tube and internal conductor to the RAVN topside -TUTA. Platforms are located in the Danish territorial waters in the North Sea (RAVN) and German territorial waters in the North Sea (A6-A). The umbilical was installed from RAVN first end to second end pull-in at A6-A end. The umbilical supplies all the necessary input data, control and feedback to eliminate the usual day-to-day requirements of direct human contact. The umbilical forms the entire link between the remote platform, supplying and controlling all functions and ensuring continual feedback and monitoring of RAVN. Utilising a dry-tree design, all control, power and metered injection for the well will be via the 18.2-km control umbilical between the new satellite platform RAVN in the Danish sector and the operational platform A6-A in the German sector. RAVN is a remote and unmanned crude well unit. installed a new remote platform RAVN as a crude production tie-back to A6-A.