faster umbilical recovery minimises production disruption · 2018. 2. 12. · dnv verification •...
TRANSCRIPT
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Chris Bond
Senior Design Engineer
Faster Umbilical Recovery MinimisesProduction Disruption
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Subsea Cable Deployment a Growing Industry
Communication Cables
• Still preferred to satellite• Global network in excess of
550,000 miles• Multiple routes prevent
outages• Cables are still being
developed
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Subsea Cable Deployment a Growing Industry
Power Cables (Windfarms)
• Numerous turbines all connected to each other and to a central a substation
• Larger cables back to land
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Subsea Cable Risks
Fishing
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Subsea Cable Risks
AnchorsJersey Internet Outage 2016
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Subsea Cable Risks
Nature
2011 Tōhoku earthquake 2006 Hengchun earthquake
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Subsea Cable Risks
• Piracy / Theft
• Abrasion
• Sharks
Other
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Cable Repair
• Locate the cable fault
• Cut and remove faulty/damaged section
• Retrieve cable ends to surface
• Splice in new section
• Test and return to surface
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Webtool Cable Cutting
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Webtool Cable Cutting
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Webtool Cable Cutting
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Current Retrieval Methods
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Limitations and Failings
• Required ROV trenching
• Time consuming
• Difficult to deploy
• Unsafe
• Weather condition dependant
• Lifting position
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CRT200 Cable Retrieval Tool
LeadscrewHot Stab Interface
Hydraulic Motor
Retrieval Shackles
Deployment Shackles
Compensator
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CRT200 Cable Retrieval Tool
Clutch
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DNV Verification
• DNVGL-ST-N001 – Marine Operations & Marine Warranty, June 2016
• DNVGL-ST-0378 – Standard for Offshore & Platform Lifting Appliances, May 2016
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Deployment
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Retrieval
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Planned Qualification Process
• 46 Tonne qualification pull test complying with DNV safety factors
• Cable and umbilical pull tests• Offshore trials
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Production Update
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Expected Timeline
• Prototype tool completion, February 2018
• Qualification testing with DNV, March 2018
• Offshore trials to follow
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Future Development
• Tool improvement
• Torque bucket
• Size range
• Cutters
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Thanks for listening Come and visit us at Stand 124
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Chris Bond, Senior Design Engineer, Allspeeds Ltd (Webtool)
Email: [email protected]
www.allspeeds.co.uk
Q & A