Mossgas FA installation 1990/91
This picture, taken from the Micoperi (Saipem) 7000, shows the FA jacket and module support frame in position, before installation of the accommodation and drilling modules etc. Behind the platform is the South Seas Driller which was being used as an accommodation barge or 'flotel'.
Sticking out of the top of the MSF are 9 of the eventually around 20 conductors. At this point they were being moved around by the swell, and gently banging together like tubular bells. Once the crane barge had put all of them in place, it used a pile driver to start 'tapping them down'.
The geology under the platform consisted of about 10 metres of hard rock, then around 80m of soft clay before hitting hard rock again. The piledriver would tap a conductor about 120 times before it would reach the clay, at which point it would just freefall down for the next 80 metres - a very impressive site.
A later stage of construction can be seen in picture #83
Picture added on 06 December 2006