Flat - the form of an offshore production and of the installation on a production site at sea of such a flat - form

摘要

The invention relates to a flat - the form of an offshore production of the type comprising a bridge (1) mounted to move on the legs (2) each comprising a base (8) bears on the seabed and a box (10) is open at its base and intended to penetrate into the seabed. Each box (10) is disposed inside the leg (2) and is displaceable along the axis of this leg (2) between a retracted high position and a lower position by a projection and anchored in the bottom marin.l' invention also relates to processes for installation on a site of exploitation of such a flat -.