Salvage Experts

Project

Wintershall RAVN and A6-A

Wintershall Noordzee B.V. installed a new remote platform RAVN as a crude production tie-back to A6-A. RAVN is a remote and unmanned crude well unit. 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. The umbilical forms the entire link between the remote platform, supplying and controlling all functions and ensuring continual feedback and monitoring of RAVN. 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 was installed from RAVN first end to second end pull-in at A6-A end. 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 connected/pulled into RAVN via a J-tube and internal conductor to the RAVN topside -TUTA. 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. SCOPE OF WORK Prepare project planning for Boskalis’ scope of work. Survey work, including post-burial survey. 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). Prepare platform on RAVN and A6-A. Define umbilical length together with the client. Umbilical load-out at Hartlepool (UK) onto the installation vessel Ndurance. Installation and hang-off of umbilical termination heads – topsides. Crossing 36- & 40-inch live gas pipelines. Pull-in at RAVN & A6-A platforms – direct from vessel as part of SIM-OPS. Umbilical lay and bury scope – minimize on seabed exposure. Mobilize and demobilize all installation spreads for Boskalis’ scope. Provide engineering support during the offshore umbilical installation, including simultaneous burial. Provide QHSE management for Boskalis’ scope. Process and deliver as-built data. Mobilize and demobilize all installation spreads for Boskalis’ scope.

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Project

Wintershall L8-P4

Wintershall Noordzee B.V. installed a new remote platform at L6-B as a gas production tie-back to L8-P4. L6-B is a remote and unmanned gas well unit. 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. The umbilical forms the entire link between the remote platforms, supplying and controlling all functions and ensuring continual feedback and monitoring of L6-B. 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 was installed from L8-P4 first end to second end pull-in at L6-B remote end. Both platforms are located in Dutch territorial waters in the North Sea. The umbilical was connected/pulled in to L6-B via a J-tube and internal conductor to the L6-B topside - TUTA. 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. FACTS AND FIGURES Water depth 30-35 meters Challenging North sea conditions. Challenging soft seabed. Fast-track project, with a short lead-time between award and installation – Feb 2014, July/Aug installed. Stepped phase process of pull-in, laying and burial ops. Completed on time, with no incidents. Umbilical loaded quickly and safely. Umbilical length 19.5 km. Burial scope of single pass burial of umbilical minimum requirement of 1m TOC (top of cover). SCOPE OF WORK Prepare project planning for Boskalis’ scope of work. Survey work, including a pre-burial, as-laid and post-burial survey. Perform route engineering and installation engineering to optimize the performance of the installation scope, including a detailed burial assessment study (BAS). Prepare platform on L8-P4 and L6-B. Define umbilical length together with the client. Umbilical load-out at DUCO Newcastle (UK) onto the installation vessel Ndurance. Hang-off of umbilical end. Crossing 36-inch live gas pipeline Callantsoog. Pull-in at L6-B & L8-P4 platforms – direct from vessel as part of SIM-OPS. Mobilize and demobilize all installation spreads for Boskalis’ scope. Provide engineering support during the offshore umbilical installation, including burial. Provide QHSE management for Boskalis’ scope.

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Vessel

Mighty Servant 3

Heavy transport vessel

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Vessel

Boka Pegasus

Deep water anchor-handling tug

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Project

Salvage operation, Mighty Servant 3

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. 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. Moreover SMIT Salvage was contracted to salvage the Mighty Servant 3 in order to give her a second life. After having finalised the ’Nautilus’ salvage project the Taklift 7 immediately departed for Angola. Furthermore diving vessel Smit Orca was mobilised. The Mighty Servant 3 was salvaged by means of sheerlegs Taklift 7 and by pressurizing the various compartments with compressed air. Initially the bow was refloated and stabilized. Subsequently the stern was lifted. Ultimately the vessel was fully dewatered and successfully redelivered to the owners on 26 May 2007. Furthermore the vessel was transported to Cape Town - South Africa for repairs, where she arrived on Sunday 17 June 2007.

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Project

Salvage operation, Full City

On July 30, 2009 bulk carrier Full City, (in ballast and at anchor off the port of Langesund, Norway, awaiting her berth) was trapped in a sudden storm, causing her anchor to drag. She went aground off the port of Langesund. This vessel was refloated by a SMIT Salvage team in mid-August, following the successful completion of a challenging operation.The Full City was driven onto a rocky shore after which the engine room flooded and the double bottom fuel oil tanks breached resulting in an initial spill of Heavy Fuel Oil (HFO). Subsequently, the Norwegian Coastal Administration (NCA) deployed all available crafts, oil barriers/ booms and anti-pollution equipment in order to battle the pollution. SMIT Salvage was awarded a Lloyd’s Open contract by the owners. SMIT’s Norwegian partner, tug and salvage company Buksér og Berging (B&B), was taken on as subcontractor. A salvage team from Rotterdam was immediately mobilised as well as the most essential salvage, pumping and fuel oil recovery equipment. SMIT Salvage and B&B assembled a fleet of vessels, including three B&B tugs together with a tank barge and a Diving Support Vessel (serving as the salvage team’s main work platform), while the NCA kept Coastguard vessel Nornen and tug Balder on site. The salvage team recovered all remaining heavy fuel oils and other pollutants out of the holds and tanks by means of skimming and pumping. The recovered pollutants were transported to shore and disposed of. Following this, the damaged holds could be repaired. The vessel was then de-ballasted in preparation of a refloating attempt. With the assistance of the three B&B tugs, the vessel was successfully refloated at the first attempt. Accordingly, SMIT towed the Full City to a more sheltered, deep-water NATO jetty nearby the grounding site. Upon arrival, the salvage team conducted a final diving survey after which the vessel was redelivered to the owners.

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