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Offshore subsea intervention works on the Dutch Continental Shelf

Offshore subsea intervention works on the Dutch Continental Shelf

GdF Suez E&P Netherlands, in combination with NOGAT, contracted DeepOcean for a series of subsea projects in the period from July to September 2014.

Bluestream was awarded a contract by DeepOcean for the diving and ROV activities.
DeepOcean provided the new DP2 vessel Deep Helder, a work class ROV system and the Carrera 4 excavation system. Bluestream mobilised an air diving spread, a Tiger TMS inspection ROV and project management and engineering for the workscopes B-C.

The interventions were divided into four workscopes:

A. Pipeline inspections with an external CT-scan tool
B. Exchanging subsea Check Valve at NOGAT side tap KP 82.77
C. Exchanging Control Pod at subsea tree completion G17-S1
D. Survey, inspection and valve manipulation at three side tap locations of companies K/L field

All diving operations were undertaken on the Dutch Continental Shelf in the North Sea with a working depth varying between -15 and -40 Msw.

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