Grgrergergerg

Tampen Link Hot Tap ProjectJørund Fonneland, Technip Norge AS

Pipeline Repair System

FFU, January 29th, 2009

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Future hot-tap technologyIV_

III Hot-tap animation for next hot-tap project_

Tampen LinkII_

_ What is hot-tap?I

Contents

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What is Hot-Tap?

Connecting a branch pipe to a mother pipe whilst maintaining production in the mother pipe

Mother pipeline

Branch pipe

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What is Hot-Tap?

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Tampen Link Field Layout

Tampen LinkSFC

From Snorre A

SF Satelites

LEGEND Existing Gas pipeline

New Gas pipeline

X-over

Brent A

SFC

SFA

SFB

Brent B

From Snorre B

Northern LegGas Pipeline(NLGP)

Gassled Area A(Statpipe)

FLAGS

10” export riser

Statfjord IntrafieldPipeline System(SIPS) 10” Gas

20” Oil

20” Oil12” NLGP Spur

Hot-tap on Flags

Hot-tap on Intrafield

New pipeline, ”Tampen Link”Statfjord – Flags, ~23 km, 32”

Inline Tee

Pipeline End Manifold(PLEM)

Pipeline End Manifold (PLEM)

X

X-over to Gassled Area A, to be closed

From Gullfaks

SIPS Hot Tap

New pipeline, “Tampen Link” Statfjord – Flags, 23 km, 32”

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Tampen Link HistoryAugust 2007, the Tampen Link Hot-tap operation was aborted due to the diver operated Hot-tap tool failing. The Tampen Link project was “put on hold”.

February 2008, the Tampen Link project called for mobilisation of the PRS Remote Hot-tap tool.

The scope was to mobilise the never used PRS hot-tap prototype in six months.

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Tampen Link Hot-tapTest programme:

Function testingSite Integration Tests“Dip test” (function test at 15 msw)Wet hot-tap test adjacent to Tampen Link location (145msw)

Lots of small problems discovered in every test. Very hectic period before mobilisation.

To save time offshore, divers were used for:

ObservationsSeabed preparationsSmall tasks (e.g. valve operations)

Some technical problems offshore resulted in jo-jo lifting of system

Hot Tap completed 20. August 2008 without problems

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PRS hot-tap machineControlled via stab made from converted ROV winch:

Ethernet 2,4kV power3 X camera lines

Designed for 1000msw depth

Pipeline diameters: 16” – 42”

Equipped with:20 cameras10 lightsAbout 100 sensors

Weight: ca. 40 ton

Categories of CONTINGENCY:Base case according to operation procedureAlternative lines for power and communications using ROVOverride functions for ROV directly on cylinders (hydraulic hot stabs)Emergency Disconnect and Recover System (using e.g. hydraulic accumulators)All barriers rated for 12 month service

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Tampen Link Hot-Tap As-built…

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Future hot-taps:Ormen Lange Hot Tap, May 2009

Project data:

• Two hot-taps at Ormen Lange field

• 850 msw

• 100% remote operation

• Minus 5o Celsius outside pipe

• Plus 78o Celsius inside pipe

• Subsea trial is planned for in February 2009 in Sognefjorden, 940msw

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Future hot-taps:Ormen Lange Hot Tap, May 2009

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Future hot-taps:Retrofit Tee installation