McDonald_subbed.qxp 2/4/09 04:27 Page 107
Subsea Pipeline Bundle Technology – Still Delivering Value for North Sea Operators
testing and commissioning, contribute to a high level of confidence structures and flowlines, active heated systems and various
and avoid expensive offshore delays. Simpler umbilical design is alternative material and welding initiatives; in doing so, it will
achieved by laying the individual hoses and cables in the carrier strengthen its position as the subsea partner of choice. ■
without armouring. Furthermore, there is no need to separately
install an umbilical offshore. Bundles reduce the pipeline corridor
Bundle Timeline – Highlights
width to a minimum and avoid unnecessary congestion, allowing
for future developments and minimising potential risk with
• 1980: first bundle project completed for Conoco’s Murchison
anchor handling.
field.
• 1988: first bundles for Norwegian sector of the North Sea
The carrier pipe provides a secondary barrier against any leaking
installed in Elf Aquitaine’s East Frigg field (diverless installation).
product, thus minimising environmental pollution. Current carrier
• 1992: first corrosion-resistant alloy flowline within a bundle for
designs can be made suitable for waters >700m deep.
Phillips Petroleum Company’s Embla field.
• 1994: longest ever controlled-depth tow methodology tow and
deepest ever installation at 350m for Conoco’s Heidrun field.
The Future of Bundle Technology
• 1994: first carbon–steel corrosion-resistant alloy lined flowline
As Subsea 7 marks its 60-bundle milestone, it looks forward to
within a bundle for BP’s Cyrus field.
the challenge of improving and supplementing existing systems,
• 1997: busiest ever year, with two 7km bundles and one 4.6km
and believes this will be accomplished by the same continued
bundle for the Shell Gannet field, a 1.8km bundle for Maersk’s
investment into research, resources and expertise that brought
Dan field and a 3.8km bundle for Statoils Asgard field.
about the development of CDTM nearly 30 years ago. The fast-track
• 1997: second deepwater installation and first actively heated
Jura project has advanced pipeline bundle technology through
bundle for Asgard field.
new fabrication, transportation and integration techniques, and
• 2000: largest bundle to date – a 49-inch carrier for Statoil’s
sophisticated bundles and towheads of more than 500 tonnes
Gullfaks field.
are now an established option alongside more traditional subsea
• 2003: first winter launch for Venture’s Sycamore field.
construction methods.
• 2007: largest ever bundle towhead for Total’s Jura 1 and
2 fields.
Subsea 7’s aim is to launch a new generation of subsea • 2008: 60th bundle launch and install for BP’s Machar field – the
technological solutions through the development of ongoing in- second winter launch (see Figure 6).
house projects, such as open and intelligent bundles, towed
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