The chervil fixed platform topsides being lifted off by a crane as part of a Decommissioning project

Chevril Platform Decommissioning

Quadrant Energy engaged Vertech to establish a methodology for using their decommissioning services to develop access to the platform via Rope Access and install temporary access systems and fall protection for future access by the Quadrant operations team.

The existing access ladders and stairways were critically affected and not usable. The helideck was corroded all the way through in multiple areas. Vertech worked with Quadrant and third-party engineers to design and install replacement access ways.

Multiple new methodologies and technologies were custom designed to complete this project including:

Big Shot access system
Custom designed temporary access
Customised fall protection netting
Grid mesh replacement with FRP
Minimal equipment and manning footprint
Multi-skilled team

Vertech did not take lightly the challenge of establishing safe access to a facility with extensive corrosion and unknown structural integrity. Working closely with the client, Vertech established comprehensive methodologies to ensure the project could be undertaken safely. Vertech crews established initial access using rope access systems anchored from the main structure, which was known to be structurally sound. Once initial access was established, static fall protection was set up across all work areas. With initial access established, Vertech’s multidisciplined team, consisting of mechanical fitters, riggers and scaffolders, worked to make the facility safe for non-rope access personnel.

To do this, Vertech installed replacement stairways and ladder systems, replaced grid mesh with fibre-reinforced plastic panels, and built a scaffold walkway across the helideck. A key innovation for this scope was the use of fall prevention netting to enclose the platform underneath the helideck. Netting was utilised as a quicker and more cost-effective alternative to full handrail replacement.