McDonald_subbed.qxp 30/3/09 09:17 Page 105
Subsea Pipeline Bundle Technology – Still Delivering Value for North Sea Operators
Figure 1: The BP Machar Bundle Figure 2: The Total Jura Bundle Cross-section
Control tubing and
electrical cabling cores
29.5-inch carrier pipe
20mm LDPUF
Main spacer
insulation
13.5-inch sleeve pipe
8-inch 22Cr production pipe
hardware and software. The Jura bundle was successfully launched
in April 2008, with offshore tie-ins and testing completed in
May 2008 (see Figure 3).
through the town of Wick. A unique landing craft transported the two
towheads (the leading production manifold towhead and the trailing Bundle Technology
towhead) from the fabrication site to the launch site. A temporary The Subsea 7 pipeline bundle product integrates the required flow
roadway was built on the beach to receive this vessel and multiwheel lines, water injection, gas lift, chemical injection and control systems
self-propelled modular trailers were used to move the structure from necessary for any subsea development and assembles them within a
the barge/beach to the bundle fabrication site.” steel carrier pipe. At each end of the pipeline, the towhead structures,
incorporating equipment and valves, designed specifically to the
Before launch the pipeline and associated equipment located within requirements of the field, are attached. The system, which has been
the structures were also subjected to a full and thorough site fully function-tested onshore, is then launched and transported to its
integration testing programme to ensure that the many interfaces offshore location using CDTM (see Figure 4).
between the control equipment and valves operated as per project
and client requirements. During this phase, the offshore control The CDTM was pioneered and developed by Subsea 7 and it involves
room equipment was set up on-site to facilitate full testing on both the transportation of pre-fabricated and fully tested pipelines, control
THE RELIABLE LINK
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