NCA completes North Sea subsea wellhead recovery operation

NCA has completed a subsea wellhead recovery operation at 265 m (869 ft) water depth in the North Sea.

Offshore staff

TANANGER, Norway -- NCA has completed a subsea wellhead recovery operation at 265 m (869 ft) water depth in the North Sea.

The cutting and recovery operation, which included a net guard and the subsea wellhead, was performed from the construction vessel Olympic Zeus and marks a new world record for water depth with the Internal Multi-string Cutting Tool (IMCT), according to NCA.

The cut was made 5 m (16 ft) below the seabed as per NORSOK guidelines and actual time spent on site was less than 26 hours despite up to 6 m (20 ft) heave during the operation, the company says.

NCA's scope of work included:
- Project management
- Engineering and work program preparation
- Hazop facilitation
- Vessel, cutting, and recovery equipment mobilization
- Offshore removal of net guard and subsea wellhead
- “As left” survey
- Demobilization

11/30/2009

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