To main content

Mooring installation and hook-up, OSX3

OGX - OSX is a Brazilian oil and gas company owning and operating several floating facilities in Brazil. MODEC secured the FPSO purchase contract and subsequently awarded Boskalis the Mooring Installation & Hook-up contract. The FPSO had to be installed in the Tubarão Martelo Field, located in the Campos Basin, Brazil, in 105 meters water depth.

The FPSO OSX-3 is permanently moored by means of a 360 degrees weathervaning external turret mooring system. The mooring system consists of a total of twelve mooring legs in a 3-by-4 arrangement, where the centerline of each group is 120 degrees apart. Each mooring chain is held by a driven pile and consists of a connector shackle and 120 mm stud-less chain up to the hang off point on the turret.

Mooring installation and hook-up

Boskalis was responsible for the planning and administration of the project, the development of detailed installation procedures and the execution of the mooring installation (phase 1) followed by the FPSO Hook-up (phase 2). Upon arrival and importation of equipment and mooring components in Rio de Janeiro it was loaded on board the installation vessel (Construction Support Vessel (CSV) Boa Deep C) directly from the transportation vessel. After receiving the Installation License from the Company the CSV sailed to site and after an ROV pre-survey the installation of the anchor piles started. The mooring chains were connected to the mooring piles on deck of the CSV and installed at designated location within specified tolerances. Upon installation of the piles the mooring chains were pre-tensioned with the CSV to a tension of 200 ton and laid in a pre-determined pattern on the seabed; wet stored until hook-up operation commenced. This phase was completed end of August 2013.

Related projects

Selected filters
D1107-1233_header.jpg

Seabed preparatory works,
Dana Medway

Dana Petroleum Netherlands B.V. is the operator of the Pllb De Ruyter field and oil-producing platform located in the Dutch section of the North Sea.

DPFV_Sandpiper_accompagnied_by_SMIT_tugs_on_her_way__to_worksite_header.jpg

Rock installation, PDET

In 2008 Boskalis was approached by Petrobras to carry out a rock installation project at the oceanic terminal, one of Petrobras’ offshore oil production locations. The terminal, situated at Campos Basin offshore Rio de Janeiro, Brazil, is a maritime complex consisting of one Independent Re-pump Platform (PRA-1), two monobuoys and a FSO vessel which links to a 20 inch gas pipeline system.

Belwind_1_bewerkt_header.jpg

Construction wind farm, Belwind

SMIT sheerlegs Taklift 4 installed the final element for one of Belgium’s first offshore wind farms, Belwind, the wind farm’s high voltage transformer substation. SMIT also provided the transport of the element and other marine support services to assist the construction of the wind farm.

Walney_wind_farm_UK_support_installatie_monopiles_windmolens_header.jpg

Offshore wind farm, Walney

Windfarm construction projects regularly feature in the work programmes of SMIT’s sheerlegs fleet. For example, the Taklift 7 was involved in the Walney Offshore Windfarm development in the Irish Sea. Walney Offshore is a wind farm project developed by DONG in the Irish Sea, some 20 miles from the coast at Barrow.

Magellan_4_header.jpg

Pipeline crossing, Strait of Magellan

The project involved the construction of a new, strategically important, 24" natural gas pipeline across the Strait of Magellan, linking Cabo Espíritu Santo in Tierra del Fuego province with Cabo Vírgenes in Santa Cruz province. The new pipeline was built as an expansion of the existing San Martín pipeline in an effort by the government to increase gas supplies from Tierra del Fuego to the Argentinian mainland.

TR_Giant_4_header.jpg

Offshore wind farm, Sprogø

On behalf of marine contractor Aarsleff, SMIT was involved in the construction of the new Sprogø Offshore Windfarm, west of Copenhagen.