Abstract: A control system for subsea oil wells, more particularly well heads, is disclosed, which comprises, in combination, an electronic command and control unit, a valve actuating hydraulic electric unit, a power generator unit, and interconnection devices for interconnecting the hydraulic lines for controlling the whole system from the surface with the hydraulic units for commanding the electric-hydraulic unit.

Abstract: In a self-propelled, remotely controlled vehicle adapted to operate on the sea bottom for extracting ores therefrom, a V-shaped tubular structure has at its apexes a system of crawlers for moving the structure on the sea bottom. Underneath each side of the V-shaped structure, a scraping system is operative and its long axis is perpendicular to the corresponding side of the V-shaped structure. Tubular conveying systems for elevating the ore to the surface are provided. The V-shaped structure is collapsible by means of hydraulic actuators.

Abstract: A submersible oil-storage tank is constructed from a foundation plate which has a flat lower face and a concave upper face and contains a series of hollow cells, a cupola mounted on the foundation plate to form a spheroidal chamber, and extensible-retractable tie members connecting the cupola with the foundation plate. An expansible separating wall extends across the chamber and divides it into a lower sub-chamber and an upper sub-chamber. Each sub-chamber is provided with a valved duct so that water may be permitted to flow into or out of the lower sub-chamber and oil may be permitted to flow into or out of the upper sub-chamber.