Facilities decommissioning - new and emerging technologies
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| Areas |
Technologies |
| Surveying and planning |
- Decommissioning planning (CNOOC and OGTC)
|
| Topsides and jacket preparation and removal |
- Alternative, more cost-effective cutting and removal techniques for jacket and topsides (Perenco, Apache, TAQA)
- External hydraulic lifting tools (CNR)
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| Subsea decommissioning |
- Leaving mattresses in place, potential rock dumping for ‘trawlability’ (Alpha)
- Drill cutting analysis vacuum tool (Total)
|
| Site monitoring |
- Ocean power technologies for site monitoring and guard buoys (Premier)
- AUV technologies for site monitoring (Shell)
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Supporting information
Cutting and removal
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 |
- Cost effective alternatives to the cutting and removal of steel could be economic and operational benefits
- Accelerated corrosion through electrochemical dissolution is one potential technology
- OGTC have supported a feasibility study, inclusive of providing the technique on workshop-scale steel components
- follow up preparations are underway for larger scale trial
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Site monitoring technologies
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- Technologies to validate and monitor decommissioned sites when required are under assessment
- Challenged by remote location and lack of supporting infrastructure, linking local power generation, communication buoy technology or passive sensors may provide a solution
- Industry efficiencies could result from a campaign or joint operator approach
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