Decommissioning

A well-planned decommissioning project from end of life, cessation of production, engineering down and clean through to removal activities ensures an asset that is maintained in a fit for purpose condition through the decommissioning process. We work with our clients to provide a logic-based plan to assure and efficient decommissioning project.

Apollo can assess your asset to understand if it is structurally sound to be removed and repurposed along with after-market investigation (e.g. conversion to NUI or carbon capture purposes).

It is important to plan for and maintain an asset post CoP to assure the decommissioning process. We work with our clients to understand the decommissioning timeline and plan for either man or unmanned maintenance and operation in the “cold” life of an asset.

Maintaining appropriate power generation capacity in decommissioning is important. It is unlikely that the existing power generation systems will be appropriate for activities in CoP. Apollo can understand power demands post-CoP and provide economic analysis for temporary power solutions in the decommissioning phase. Apollo brings together learnings from other previous decommissioned assets where power generation has been challenging.

Apollo has been involved in many aspects of well P&A, from mechanical analysis of the wellheads through to design support for test rigs for P&A activities. Understanding of mechanical challenges of P&A and removal of wellheads, conductor and casing allows cost and scheduling implications to be clearly understood and how to prioritise activities.

Our in-house subsea and marine engineering team provide project engineering support and solutions to successfully decommission all types of subsea architecture and engineer lift strategies to enable seabed retrieval. Apollo’s expertise includes pipeline flushing and contaminant removal strategies and procedures.

We work with you to identify successful platform decommissioning strategies to allow safe removal of modules whilst maintaining appropriate life support systems on board. We can then engineer these concepts through the project lifecycle for our clients taking a staged approach to the overall removal.

Our marine team can engineer safe lifting, sea fastening and transport methods for decommissioned structures. We have been working with onshore sites to understand how to dispose of equipment, particularly in preparation for scale of word forecasted.

Should you wish it Apollo can provide competent engineers to provide assurance to your project on third party activities and deliverables.