Page 63: of Offshore Engineer Magazine (Jan/Feb 2015)

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Pipelines development in the Norwegian Sea about 19km of 12in BuBi-Pipe will be installed by reel-lay.

Subsea 7 says the main chal- lenge associated with BuBi-Pipe by reeling was to demonstrate that the inner pipe, or liner, did not suf- fer from local buckling during the spooling process. “Equally impor- tant was to demonstrate the integrity of the weld joining the liner pipe to the outer pipe at the ends of each joint or seal weld,” said Subsea 7 last year [2014].

Technip’s ? rst reel lay with mechanically lined pipe is due to be on Deep Gulf Energy’s Kodiak proj- ect in the Gulf of Mexico. The job is also BUTTING’s next BuBi-Pipe project for reel lay, under a contract with Tenaris. Technip is the instal- lation contractor with installation expected in 2015.

Kodiak is in Mississippi Canyon

Blocks 727 and 771, in the Gulf of Mexico, in 1472-1710m water depth. The project is a subsea tie- back to the Devils Tower Truss Spar in Mississippi Canyon Block 773.

To withstand Kodiak ? eld’s high- temperature and pressure, as well as extremely corrosive production the issues around internal buckling of the ? uids, mechanically lined pipe was liner during the laying process. chosen. It will be installed using the “Most projects have been installed by Deep Blue deepwater pipelay and

S-Lay, followed by Bundle,” says Brigitte subsea construction vessel.

Blechinger, Senior Sales Manager Oil “Generally, BuBi-Pipes are quali- & Gas at BUTTING. “Reeling seems to ? ed for reeling by DNV GL and be coming up as a new method, as it is other accreditation societies and a cost effective solution compared to in case of e. g. Guará-Lula by our the others. Further, a shorter installa- customers Subsea 7 and Petrobras,” tion period is required and the majority Blechinger said. Subsea 7 is also of welding and inspection can be done further developing the uses for

BUTTING’s own-brand BuBi-Pipe in manufacturing. Photos from Butting.

onshore. Vessels are ? exible and they can BuBi pipe, speci? cally around its quickly be mobilized to global locations. potential to be used for fatigue-

In the end reeling has a positive cost and than e. g. metallurgically clad pipes. on BuBi-Pipe with 3mm liner. BuBi-Pipe sensitive applications, such as steel time impact on offshore development “The manufacturing process used ranges from 4in to 28in. outside diam- catenary risers. projects.” is economically superior and strictest eter and up to 24m-long, produced in With an order backlog for BuBi-

Reels can be loaded at a spoolbase, tolerances can be gained, using special- accordance with API, ASTM, DNV or ISO Pipe for reel lay in place, BUTTING where the pipe is spooled onto reels ized production for both carbon steel and suitable for S-Lay, J-Lay, bundle or says demand for the pipe is growing. on the vessel, or, as with EMAS AMC’s and CRA material,” Blechinger says. “ In reel-lay. “Currently a lot of projects are tender-

Lewek Constellation, they can be taken addition, variable combinations of mate- Subsea 7 was the ? rst to install ing mechanically lined pipes where on the reel to the pipelay vessel on a rials can be used, freeing the manufac- mechanically lined pipe by reel-lay on installation shall be made by reeling,” barge and be lifted in to place, replacing turer from as many raw material supply Petrobras’ pre-salt Guará-Lula NE project Blechinger says. empty spools, without the vessel having constraints.” in Brazil’s Santos Basin, using the Seven Technip, which installed the ? rst to return to a spoolbase. The move to develop mechanically Oceans pipelay vessel. Some 70km of reeled steel catenary riser in 2001, has

According to Brigitte Blechinger, manu- lined pipe for reel-lay began in the late BuBi-Pipe SCRs were installed by reel- said its design, endorsed by DNV in facturing output of BUTTING’s BuBi-Pipe 2000s, led by Subsea 7 and Technip. lay in 2100m water depth. Subsea 7 is 2011, allows reel-lay at atmospheric is also 3-4 times higher than output for BUTTING has been working with already also lining up its next job, on pressure. Technip also had a ? tness for clad pipes, further speeding up the pro- Subsea 7 to qualify its BuBi-Pipe for ? ow- Statoil’s Aasta Hansteen development service certi? cate from DNV in August cess – BUTTING can produce a lot more lines and low-fatigue riser applications offshore Norway for which BUTTING has 2012 for a dynamic mechanically lined

BuBi-Pipes within a certain time frame by reel lay and since 2008 exclusively already delivered the BuBi-Pipe. For the SCR for reel-lay. oedigital.com January 2015 | OE 65 064_OE0115_Pipelines1.indd 65 12/22/14 8:16 PM