Installing a saturated diving spread onto a semi-submersible rig meant preparing a whole new safety case
A diving spread introduced new factors to consider when preparing a safety case, not least a new critical area with living quarters.
With an established relationship of trust already in place, Well-Safe Solutions turned to Marex to support them for a revision of the full suite of formal safety assessments.
The story of Well-Safe Solutions
Well-Safe Solutions offer a specialist well abandonment service that allows operators to meet the challenges and regulatory requirements around decommissioning, while significantly reducing costs.
They provide a groundbreaking approach to the safe and cost-efficient decommissioning of on and offshore wells.
Bringing together a wealth of decommissioning oil and gas expertise and experience with dedicated bespoke marine and land-based assets and equipment, Well-Safe is the first-of-its-kind Tier 1 company offering the complete plug and abandonment (P&A) capability – from front-end engineering and design, through to project execution and the retention and reintroduction of lessons learned.
The challenge of providing risk analyses
Well-Safe Solutions was looking to install a saturated diving spread onto one of their rigs.
The diving capability is important in their decommissioning work, with saturation divers living in a pressurized environment while on board the rig.
The planned installation was for a fully refurbished and upgraded D300 12-diver saturation diving system, complete with a bespoke fully electric submersible decompression chamber handling system and twin self-propelled hyperbaric lifeboats.
The system would ensure safe and effective handling of older hydraulic and manual tree systems.
Deploying a saturation diving system from the Well-Safe Guardian eliminates the need for a dive support vessel (DSV). Limiting the number of vessels in-field reduces simultaneous operations (SIMOPS) activity, removing the need for pre-work campaigns with other vessels.
This increase in the installation's scope of operations needed a renewed safety case submission to the Offshore Major Accident Regulator (OMAR), the UK authority responsible for regulating offshore major hazards.
Why Well-Safe Solutions chose Marex
With an established relationship of trust already in place, they turned to Marex to support them as a revision of the full suite of formal safety assessments was required.
We had already prepared the safety case for the Well-Safe Guardian and they knew they could rely on our 25 years of offshore expertise. That is what has equipped us with a wide range of risk-based methodologies, all of which give complete assurance of compliance.
How Marex responded
The installation of a diving spread introduced new factors to consider when preparing a safety case, not least a new critical area with living quarters. We needed to revise the existing risk analyses, including new potential hazards that had been introduced to the environment.
This look at the full suite of formal safety assessments, which included:
This allowed Well-Safe Solutions to ensure that all risks associated with the increase to the installation’s scope of operations had been identified and analysed through a robust risk management process and supported the subsequently successful safety case submission.
Read more about how we originally supported the Well-Safe Guardian.
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