System injecting gas into a storage tank

A storage tank for a fluid, the liquefaction temperature of which is lower than −50° C. under atmospheric pressure, the storage tank has a cylindrical shape around an axis of revolution with a bottom wall, an upper wall and a cylindrical peripheral wall connecting the bottom wall to the upper wall, said storage tank comprising at least one thermal insulation barrier covered with a sealed and corrugated membrane and in such a way that the sealed and corrugated membrane delimits an inner volume of the storage tank;

• the sealed and corrugated membrane including a plurality of corrugations that are used to delimit a space between said corrugations and the at least one thermal insulation barrier, the storage tank including at least a gas injection system injecting gas into the space, wherein the gas injection system comprises at least one circular pipe spreading around the axis of revolution of the storage tank, said circular pipe being located in the space delimited by the corrugations of the sealed and corrugated membrane of the bottom wall and the thermal insulation barrier, the gas injection system comprising at least one nozzle linked, flow-wise, to the circular pipe and in such a way that the at least one nozzle injects gas beneath the corrugations of the sealed and corrugated membrane.