CONTROLLABLE AIR CHAMBER Russian patent published in 2007 - IPC B65D90/28 B65D90/38 B65D88/34 

FIELD: methods, ensuring lower losses of light hydrocarbons during storage in oil and oil product reservoir.

SUBSTANCE: the chamber is represented by a hermetic sphere-shaped air-cushion. The cushion consists of layer, while each following layer is positioned on top of the previous one. Internal layer is made of elastic high-strength frost-resistant material, capable of changing its volume during forcing in of excessive pressure. Preventive layer limits stretching of first layer. External layer - protective - is made of n layers of dense gas and oil resistant material, which preserves the elastic cover from contact with oil product steams, and serves as an additional protective layer during emergency situation, preventing influx of air from air cushion into reservoir. Air cushion is capable of changing its volume when pressure inside it changes, which is achieved by inflation-deflation of air cushion.

EFFECT: lowered losses of oil product to evaporation during "breathing" of reservoir.

2 dwg