To main content

Subsea pipeline repair, Bukom SBM

The Shell Bukom Refinery on Bukom Island imports the bulk of its crude oil feedstock through a Single Buoy Mooring (SBM) situated approximately 5.2 km from the island in the deeper water necessary to accommodate Very Large Crude Carriers.

The SBM is connected to the shore by a 48” concrete weight coated submarine pipeline. To extend the operating life of this pipeline, a 2.7-km section starting at the Pipeline End Manifold (PLEM) containing most of the corroded spots was replaced. The overall project scope included laying approximately 2.7 kilometers of new pipeline in the re-routed trenched corridor, de-oiling the existing pipeline, removing the existing SBM buoy and PLEM, in-situ inspection of the SBM mooring chains, de-burial, cutting and removal of the existing pipeline at both tie-in locations, installation of the new PLEM, associated tie-in connections between the newly laid pipeline and the existing facilities, re-installation of the SBM, hydro-testing and final leak testing of the modified facilities. The scope was extended to include the removal of the replaced pipeline section. Due to the close proximity to the existing SBM and its mooring chains, soil surveys requiring anchored vessels could not be carried out on a potential hard spot. There was a serious concern that dredging this section would not be possible using the proposed dredging equipment during pipeline outage. Boskalis suggested dredging this particular trench section using the Trailing Suction Hopper Dredger (TSHD) Queen of the Netherlands with a ripper draghead well in advance of the actual trench dredging works. The ripper draghead broke and removed the weathered rock and overlying, stiff to very stiff, clay and gravel.

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.

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.

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.

E_-_Tower_Crane_Installation.JPG

Çanakkale 1915 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.

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.

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.