A method of transferring a liquefied gas under pressure contained in a container into a tank or a gas transport network. The container is connected to a recirculation circuit that includes a heater and a recirculation pump connected in series with the heater, upstream from the heater, and arranged to discharge liquefied gas taken from the bottom of the container into the heater, the method including connecting the container to the tank or to the network, via a circuit for transferring the liquefied gas in the liquid phase and not having a pump; allowing the liquefied gas to be transferred to the tank or to the network via the transfer circuit under the effect of a higher pressure in the container; and operating the pump to compensate for the reduction in pressure inside the container during transfer.

In one embodiment, a pressure control assembly includes a cylindrical hollow body having an opening to receive a ballast gas, a first and second flange, and a first and second cone. The first flange is coupled to a first end of the body, and a second flange is coupled to an opposing end of the body. The first cone is coupled to the first flange, and the second cone is coupled to the second flange. A method for controlling pressure in a chamber includes measuring a pressure of the chamber and a pressure of an exhaust system coupled to the chamber. The method includes dynamically adjusting the pressure in the exhaust system in order to adjust the pressure in the chamber, by creating a first pressure drop that is greater than a second pressure drop in the exhaust system.

Systems and methods are provided herein for gas storage and the safe release of gas using cascading burst discs. A vessel for storing gas is in pneumatic communication with a first flow path. A first burst disc is disposed in the first flow path such that gas flow is prevented when the disc is intact. A second flow path is in pneumatic communication with the first flow path and configured to receive gas flow when the first burst disc is ruptured. A second burst disc is disposed in the second flow path and configured to prevent a gas flow while the second burst disc is intact. At an operating pressure, the first burst disc may be punctured by an operator allowing normal use of the system. In the event of a gas overpressure, the first and second burst discs will rupture permitting safe release of the gas.

A gas displacement assembly includes a storage container, a pump that pumps a pressurized gas material into the storage container, a cooling chamber that houses a coolant and cools the gas material to a cryogenic temperature, and a coolant line that transports coolant through the cooling chamber to cool the gas material.

A cavern pressure control method includes storing compressible and possibly incompressible fluids in an underground storage volume, removing a portion or introducing additional incompressible fluid into the underground storage volume, possibly removing a portion or introducing additional compressible fluid into the underground storage volume, thereby producing a net pressure increase rate (P.sub.inc) within the underground storage volume, wherein P.sub.inc is maintained at less than a predetermined maximum increase value (PI.sub.max).

In one embodiment, a pressure control assembly includes a cylindrical hollow body having an opening to receive a ballast gas, a first and second flange, and a first and second cone. The first flange is coupled to a first end of the body, and a second flange is coupled to an opposing end of the body. The first cone is coupled to the first flange, and the second cone is coupled to the second flange. A method for controlling pressure in a chamber includes measuring a pressure of the chamber and a pressure of an exhaust system coupled to the chamber. The method includes dynamically adjusting the pressure in the exhaust system in order to adjust the pressure in the chamber, by creating a first pressure drop that is greater than a second pressure drop in the exhaust system.

The invention relates to a facility for storing and/or transporting and/or transferring a liquefied gas, preferentially liquefied hydrogen, said facility having a sealed and thermally insulating container (1) comprising: a sealed external wall, a secondary sealed membrane (4) situated at a distance from an inner side of the external wall and defining a secondary space between the external wall and the secondary sealed membrane, said facility having an inerting device (11) connected to the secondary space so as to keep the secondary gaseous phase in the form of a gaseous composition constituted of one or more main chemical species, and optionally one or more secondary chemical species, wherein the partial pressure of the or each main chemical species is lower than the triple point of said main chemical species,
and wherein the partial pressure of the or each residual chemical species is lower than 0.14 kPa.

A hydrostatically compensated compressed air energy storage system may include an accumulator disposed underground, a gas compressor/expander subsystem in fluid communication with the accumulator interior via an air flow path; a compensation liquid reservoir spaced apart from the accumulator and in fluid communication with the layer of compensation liquid within the accumulator via a compensation liquid flow path; and a first construction shaft extending from the surface of the ground to the accumulator and being sized and configured to i) accommodate the passage of a construction apparatus therethrough when the hydrostatically compensated compressed air energy storage system is being constructed, and ii) to provide at least a portion of one of the air flow path and the compensation liquid flow path when the hydrostatically compensated compressed air energy storage system is in use.

The present disclosure provides backup systems for air compressors. The systems can detect an air compressor failure and/or low instrument air pressure and activate a backup inert gas power source to maintain functionality of compressed air-powered pneumatic devices at a wellsite. The backup systems can provide a working fluid in the form of an inert gas to the compressed air-powered pneumatic devices.

A tank (12) for transporting cryogenic fluids, comprising an outer container (10) and an inner container (11), having between them a compartment. The inner container (11) is adapted to contain a cryogenic fluid, which is brought outside the tank (12) through at least one cryogenic fluid withdrawal pipe (13), preferably made of stainless steel. The cryogenic fluid withdrawal pipe (13) is connected to the outer container (10) through a connection system (22) comprising a tubular bimetallic joint (14), which has an outer wall (15), adapted to be welded to the outer container (10) of the tank (12), and a central end or terminal (16), adapted to be welded to the cryogenic fluid withdrawal pipe (13).