Saipem to construct South Stream Offshore Pipeline

South Stream Transport has contracted the Italian company Saipem for the construction of the South Stream Offshore Pipeline. Oleg Aksyutin, CEO of South Stream Transport B.V. and Stefano Bianchi, SVP of Saipem S.p.A signed the contracts in Amsterdam today.

The South Stream Offshore Pipeline will consist of four parallel gas pipelines each 931 kilometres long across the Black Sea, from Russia to Bulgaria. Each pipeline will be made up of over 75,000 individual pipes which are welded together on-board special pipe-laying vessels and then laid at depths of up to 2,200 metres. The agreements with Saipem cover the design and construction of line 1 and construction of the shallow water parts,, shore crossings, landfall and associated facilities for all four pipelines.

Two vessels involved in pipeline construction

The South Stream Offshore Pipeline will be laid by several pipe-laying vessels of Saipem:

• Saipem’s Castoro Sei, a S-lay vessel suitable for both shallow and deep waters;

• The Saipem 7000, a J-Lay vessel suitable for ultra-deep water that had already constructed the Blue Stream pipeline in the Black Sea.

For the shore crossings, four micro-tunnels will be constructed on both the Russian and the Bulgarian side, each with a length of over 1 kilometre. These tunnels allow construction of the pipeline without significant construction works at the surface of the beach and shallow waters, thereby preserving the integrity of Russian and Bulgarian shores and mitigating environmental impact.

Construction to start in June 2014

Activities at the landfalls will commence in June of 2014 with the preparations for micro-tunnel construction in both Russia and then in Bulgaria.

Offshore construction will start in autumn 2014. In September 2014, the first pipes will be welded together in batches of 4 on-board the Castoro Sei to form so-called quad-joints of 48 metres long. In November 2014, the Castoro Sei vessel will move to Russian waters to start offshore pipe-laying. At the end of the year, the larger pipelay vessel S7000 will take over pipe laying and the Castoro Sei will move back to the Bulgarian harbour to continue quad-joint welding.

On board the S7000, the 48-metre quad-joint pipes will be placed vertically in a large tower (J-lay tower) and welded to the main string before being lowered onto the seabed. This method is referred to as J-lay, referring to the shape of the pipeline as it is lowered on the seabed.

Construction of the first pipeline is to last until the third quarter of 2015, so the completed Russia to Bulgaria pipeline will be taken into operations phase by the end of that year.

 

Press Release, March 17, 2014

 

 

Share this article

Follow Offshore Energy Today

Events>

<< May 2019 >>
MTWTFSS
29 30 1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31 1 2

08th OIL & GAS AFRICA 2019 CONFERENCE

OIL & GAS AFRICA is one of the most prime regional & international Oil and Gas conferences in East Africa…

read more >

FPSO Brazil Congress 2019

Charging ahead with 24 planned orders by 2022, Brazil has once again solidified its status as one of the world’s foremost oil and gas leaders…

read more >

OWI WA 2019

West Africa’s only dedicated Offshore Well Intervention Conference is returning for its second year…

read more >

OIL & GAS PHILIPPINES 2019

Oil & Gas Philippines event display products like Oil & gas, fire protection systems and materials…

read more >

Jobs>

Looking to fill a job opening?

By advertising your job here, on the homepage of OffshoreEnergyToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of OffshoreEnergyToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of OffshoreEnergyToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply