Offshore petroleum mining structure - incorporates means of recovering hydrocarbon(s) escaping from well eliminating pollution risks

摘要

A structure for offshore exploitation including a base surmounted by a hollow tower supporting a working platform out of the water, partic. for being put into place on a sea bed having a layer of ground of poor quality of considerable thickness, has a base constituted by a slab with a grid of vertical plates on its lower face defining independent compartments and with flotation capacities on its upper face. The height of the vertical plates is comparable with the thickness of the layer of poor ground. At least one of the independent compartments situated below the hollow tower does not present a complete portion of the cover slab, so as to be able to communicate directly with the tower. Means are provided for discharging the whole quantity of liq. situated in the tower surmounting that compartment. The invention improves the structure described in the principal patent no. 7917385 of 4.9.79 in that it adapts the latter to a particular utilisation, i.e. contending against marine pollution due to eruption from an undersea well. It proposes a soln. of this problem which is rapid and reliable and which allows recovery of the hydrocarbons while isolating them from the sea to eliminate all risks of marine pollution.