Abstract: An improved facility, for the drilling and production of hydrocarbon deposits located in a deep sea bed, includes a central structural column having a bottom end secured to a submarine base mounted on the sea bed and a top end secured to a subsea buoy. A plurality of peripheral tubular conduits are located around the central structural column and connected thereto by a guide device which permits the peripheral tubular amendments to move relative thereto and positions the peripheral tubular conduits in parallel with the central structural column.

Abstract: Membrane tank having utility for the transportation and storage of liquefied gases, such as liquefied natural gas, the tank wall being comprised of two sets of warped surfaces with double curvatures, all sections of which are curved, with the surfaces of both sets being alike but having curvatures in opposite directions, some being concave and others convex in an alternating arrangement and being tangent at their common borders, each of said surfaces being anchored to a second outer wall by means of columns or partitions which project perpendicularly to a plane defined by the vertices of the warped surfaces.