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Oil & Gas
Blog
Conbit approach to caisson removal for decommissioning
18/10/2017

Postponement of Heavy Lift Vessel Selection Pays Off

Heavy lift vessel selection in decommissioning projects

Delaying contracting to vessel owners makes decommissioning more economical. The disadvantage of limiting your campaign to a specific type of vessel is that decommissioning teams are becoming dependent on major heavy-lift contractors. Platform owners, thus, lose control over the decommissioning project, and the threat of budget overruns is always present.

Conbit approach to below deck deommissioning preparation

Decommissioning process

A typical decommissioning project starts with studying the situation and applying for permits. The question of which method to use then soon arises. 

Comparative analysis of decommissioning methods is easy to manage. A project team evaluates the advantages and disadvantages of piece-small decommissioning, reverse installation, single lift, or other removal methods. The results are then reported to the management briefing using attractive graphics for better visualization. Heavy lift contractors also present their inputs to generate these images and provide supporting evidence for the budget. 

Other decommissioning methods (e.g., piece-small) are hard to budget in the initial project phases. Therefore, the heavy-lift contractors already have a head start.

Budgeting 

Budgeting removal methods that do not depend on scarce marine assets is challenging. For accurate budgeting, those responsible must have much offshore experience. These field experts should be able to translate their experience into budgeting. The involved risks and opportunities have to be quantified to understand the conclusions. The type of experience of the field experts presents an additional challenge, which is often related to conservative techniques. In addition, their expertise is often related to a specific heavy lift contractor.

Conbit as a consultant

The independence advice is critical to the overall decommissioning project and can be guaranteed by postponing contracting to vessel owners. As a consultant, Conbit can support you with a comparative analysis of all methods available on the market. Consultants do not pursue turnkey projects and can advise you more objectively.

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Author

Bram van Oirschot

Manager Sales

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Conbit B.V.

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Bram van Oirschot

Bram van Oirschot

Manager Sales