Platform for oil sea rigs - can be raised on legs attached to storage tank to which ballast is attahced

摘要

The platform (2) is mounted on three legs (3) on which it can be moved up or down by lifting gear (7). The bottom ends of the legs are attahed to a storage tank (4) which can be held down, on the seabed, by ballast weights (16) to act as anchor for the platform The storage tank is used for storing oil which is pumped up from a bore hole (B). The oil can be refined on the platform and the carbo-hydrates, refined from the oil, can be pumped back to the tank. The tank can be emptied, e.g. into a ship, to make it bouyant so that the platform can be lowered on it and towed to a different location.