Bundles and towed installation

Bundles and towed installation

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RECENT CONTRACTS

ƒ Proven patented system ƒ Recent contracts ƒ Camisea Peru (2004)

ƒ Twin 610 mm (24 in) insulated LPG pipe-in-pipe lines with a 610 mm (24 in) and a 323.8 mm (12¾ in) service lines and umbilical cable installed as a flat-pack ƒ 5000 tonne 3.2 km (2 mile) long bundle ƒ La Liberdad Equador (2005) ƒ 508 mm (20 in) by 5.5 km (3.4 miles) concrete-coated sealine ƒ Replacement for SPM installation installed in three days ƒ 12 hour tow from construction site

Once the system was proven on the outfall, more recent contracts have included larger diameter hydrocarbon lines.

SURFACE TOWSUMMARY

SURFACE TOW – SUMMARY

ƒ Installation of single or twin lines ƒ Use of recoverable external buoyancy PE line ƒ Lengths up to 8 km (5 miles) ƒ State of the art DP positioning during lowering ƒ Concrete coating for final stability ƒ Small tugs – available on short term market ƒ Proven on outfall ƒ Now used for landfall of SPM lines

Any questions?

Surface tow requires either separate buoyancy tanks which are time consuming to flood and release, or as shown here in the proprietary Flow-Lay method, use of a continuous PE line. Lines are limited to flowline lengths of about 8 km (5 miles), or the larger-diameter, shore approaches of SPM lines. This is dependent on currents and the capability of the tug DP system. Concrete coating can be applied for the final seabed stability. Small tugs can be used which do not require long-term prior booking and are far cheaper than those needed for CDT.