SUBSEA ASIA - Subsea UK

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SUBSEA ASIA - Subsea UK

Challenges in Deepwater Environment

Hydrotesting is a common requirement for all deepwater pipelines &

flexibles – here we review the unique challenge this brings subsea:

1. Large diameter line from surface vessel to deepwater PLET

needed to flood the line with filtered, treated water

2. Long duration for water temperature to stabilise if surface water

(say 25degC) used to flood line at 1000m WD (say 4degC)

3. Recovery of gauging tool to surface to verify mechanical

condition prior to pressure testing

SUBSEA ASIA 11 th June 2008

Advances in Subsea and Deepwater Pipeline Pre-commissioning

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