To main content

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.

Related projects

Selected filters
Taklift_4.jpg

Jotun A

The Jotun A FPSO, a 92,000 DWT FPSO capable of producing 70,000 bpd, began producing in 1999 on the Jotun field (Norway). As part of Vår Energi’s investment in increased oil recovery from the Balder field in the North Sea an upgrade of the Jotun FPSO is required. The Balder Future project will extend the life of the field (PL 001) by 2045, giving Norway’s oldest license a lifetime of 80 years.

Read more
Bokalift_1.jpg

L10 -C -D & -G Decommissioning

Neptune Energy Netherlands B.V. (Neptune) has awarded Boskalis the contract for the removal, transport and load-in of three platforms. These platforms are located in the Dutch North Sea, approximately 90 km west of Terschelling.

Read more
Large-190412_-_38.jpg

Borssele ALPHA/BETA

Royal Boskalis Westminster is a leading global marine contractor and services provider. With safety as our core value, we offer a wide variety of specialist activities to the oil & gas and renewa-bles sectors. These activities include marine instal-lation and decommissioning, seabed intervention, marine transport and services, subsea services and marine survey. In addition, Boskalis is a global dredging contractor, provides towage and terminal services across the globe and delivers marine salvage solutions. By understanding what drives our clients we are able to provide the solutions that enable them to meet their specific business goals. For this reason we are constantly looking for new ways to broaden and optimize our offering and are committed to expanding our proposition, supported by our financial strength. With our committed professionals in engineering, project management and operations, 800 special-ized vessels and an unprecedented breadth of activities in 90 countries across six continents we help our clients in the offshore industry push boundaries and create new horizons.

Read more
E_-_Tower_Crane_Installation.JPG

1915 Çanakkale Bridge

The 1915 Çanakkale Bridge, also known as the Çanakkale Strait Bridge, is a proposed suspension bridge being constructed in the Çanakkale area in Turkey. Situated just south of the towns of Lapseki in Asia and Sütlüce Village in Europe. The bridge will span the Dardanelles strait, about 10 km south of the Sea of Marmara.

Read more

Aberdeen bay offshore windfarm project

Boskalis was responsible for the eleven suction bucket jacket foundations, scour protection, 66 kV inter array and export cables and the installation of the wind turbine generators.

Read more
NASR.jpg

NASR full field development

Boskalis was subcontracted to install 2 topsides and 3 jackets in the NASR and Umm Shait oil fields: The Accommodation Platform/AP Jacket, the Separation Platform/SP Jacket and the Gas Treatment Platform/GTP Jacket are installed in the NASR Field. The installed net weights of the jackets ranged from 2,270 to 3,070 metric tons.

Read more

Dredging & Inland Infra

Offshore Energy

Salvage

Read more

Read more