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US 4,363,563 AGranted
System for the storage of petroleum products and other fluids in a rock
AssigneeWP-System Aktiebolag
InventorsTore J. Hallenius, Karl I. Sagefors
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AssigneeWP-System Aktiebolag
InventorsTore J. Hallenius, Karl I. Sagefors
Estimating the term…
A system for the underground storage of fluids, e.g. petroleum products in rock. The system comprises a plurality of cavities excavated in the rock. Each of said cavities has a cylindrical shape with a circular or oval cross-section. Each cavity forms a storage space the walls of which are formed by the rock and directly absorb the pressure of the fluid stored in the cavity. The cavities are arranged with their center axes standing vertically, and the vertical height of each cavity is greater than or equal to the diameter of its cross-section. The distance from each cavity to adjacent cavities is equal to or greater than the diameter of the cross-section of the cavity, and the centers of the cross-sections of the cavities as seen in a horizontal cross-section of the whole system are positioned in a two-dimensional pattern.
A system for the underground storage of fluids in rock, said fluids having a specific gravity lower than water comprising a plurality of cavities excavated in the rock, each of said cavities being cylindrical with an axis and a diameter, each cavity forming a storage space, the walls of which are formed by the rock and directly absorb the pressure of the fluid stored in the cavity, the axes of all said cavities being vertical, the vertical height of each cavity being at least equal to its diameter, the distance from each cavity to each adjacent cavity being at least equal to said diameter, and said axes of said cavities as seen in a horizontal cross-section of the system forming a two-dimensional pattern in the form of at least one regular polygon.
Dependencies are inferred from the claim text.