Oil & Gas


Apollo work with our clients to understand and plan for a successful decommissioning programme. Including developing planned activities up to and beyond CoP ensuring system maintenance for critical decommissioning activities. Concept development and evaluation including engineer down and clean strategies, removal concept evaluation, full market engagement and review.

Key areas of support

Our engineering advisory service allows operators to objectively plan a CoP process that enables an efficient engineering down/clean and decommissioning process.

  • Assurance & planning

    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.

  • Repurposing

    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).

  • Post CoP operation

    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.

  • Power generation & analysis

    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.

  • Wells prioritisation

    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.

  • Subsea decom

    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.

  • Platform decom

    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.

  • Transport & disposal

    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.

  • Client engineer

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

  1. Offshore Renewables

    Offshore Renewables

    Offshore Renewables

    Apollo’s dedicated renewable energy team has been building its capability since 2011. We have successfully applied our offshore marine experience and are expert in delivering safe, reliable and efficient solutions in the offshore environment.

  2. Hydrogen & Carbon Capture

    Hydrogen & Carbon Capture

    Hydrogen & Carbon Capture

    Apollo are working with a growing portfolio of clients advising on low carbon hydrogen strategies and projects, conceptual studies for carbon abatement and power to x projects.

  3. Nuclear Energy

    Nuclear Energy

    Nuclear Energy

    Apollo is already supporting major projects such as Hinkley Point C through various engineering discipline and design input and will export this expertise through to the Sizewell C project and beyond into an expanding market and exciting market.

  4. Oil & Gas

    Oil & Gas

    Oil & Gas

    With energy demands rising and the transition to a low carbon economy, our responsibility to extract hydrocarbons in the most environmentally efficient way possible has never been more important.