The BP Mungo forms part of the Eastern Trough Area Project (ETAP) and is a NUI installation sited approx. 22Km from the main processing platform. It is primarily a wellhead platform.
In 2016, Span Access completed a successful project on the Auxiliary Accommodation Unit and were invited back in 2017 to solve another access problem. The platform’s temporary refuge required extensive repairs to the passive fire protection (PFP) on the underside of the structure.
While technically possible with traditional scaffolding, the lack of pick-ups due to the PFP coating would result in a lengthy installation time and having explored the possibilities of alternative access with Span the previous year, BP were keen to see if we could again be part of the process in delivering another successfully completed project during the crucial summer weather window.
To provide a suspended access solution to allow Cape PFP repair techs to access all areas on the underside of the temporary refuge and complete the required remedial repairs.
The project had to be completed within the summer weather window and therefore a traditional scaffold, while theoretically possible using steel ladder beams, would not be suitable given the approx. 9m distance to be spanned between available exposed steelwork. A faster access solution was required.
We specified the use of HAKI-Span 750 suspended access platform developed in partnership between ourselves and HAKI UK. While used for a number of previous projects, both on and offshore, this installation required a creative deviation from our typical methods of installation.
Due to the lack of available pick-ups for both the finished platform, and for the rope access installation team, Span used additional wire rope winches to gain access to the area, and to facilitate the installation. A separate line was installed to the underside of the PFP and the platform beams were sent out from an inboard location and pushed out along the line, lowered on small capacity lever hoists and connected to the previously installed beams with the required components. Pick-ups into the available structure were then installed at approx. 9m spacings.
The solution was fully installed in one 14-day mobilisation with 10 productive shifts available to the team during that time. While our systems typically offer a 70% reduction in installation time over traditional scaffold, this saving on this occasion was estimated to be higher due to the complexities of using traditional ladder beams in this kind of application.
This allowed the maintenance planners to complete multiple additional repair scopes over the summer weather window and reduced pressure on logistics and maintenance.