Inde Lima platform decommissioning

Southern UK sector

Background

Client: Seaway Heavy Lifting

Location: Southern UK sector

Equipment: 15,000psi JetCut system; internal pipe cutter (IPC); hole cutter

Proserv was contracted to carry out all cutting operations to assist with the decommissioning of the Shell Inde Field, a six platform field in the Southern UK Sector.

Solution

Proserv’s 15,000psi JetCut water abrasive cutting technology was used to sever a total of 14 piles with an outside diameter of 48″ and a wall thickness ranging from 45mm to 47.7mm.

A further 19 piles with an outside diameter of 36″ and 32mm wall thickness were severed using Proserv’s internal pile cutter (IPC).

A total of 33 piles were severed, all piles were cut 3 metres below the seabed.

Scope

The work scope included internal and external cutting utilising a range of tools including a 15,000psi JetCut system, IPC and hole cutters.

Trials were carried out at Proserv’s Aberdeenshire facility and a full site survey was conducted to determine platform access and equipment requirements.

The cutting operations were carried out in two separate stages. The first consisted of the hole cuts, this allowed for shackles to be installed, followed by the second subsea cutting operations stage which completed the work scope.

Benefits

 

  • A wide range of topside and subsea solutions for platform decommissioning
  • Experienced personnel with an impressive track record in decommissioning cutting projects
  • Robust tooling for use in hazardous environments
  • One of the safest cutting systems available and harmless to the marine environment
  • Internal and external cutting solutions provided

 

Conclusion

The internal cutting tool provided a safe and reliable method of achieving clean cuts to the subsea structure.

The cold cutting method allowed for the efficient recovery of the structure and targeted cut points. Proserv’s range of cutting solution services are ideally suited for use in decommissioning projects.

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