Refrigeration – Storage of solidified or liquified gas – Underground or underwater storage
Reexamination Certificate
2006-02-23
2008-11-18
Doerrler, William C (Department: 3744)
Refrigeration
Storage of solidified or liquified gas
Underground or underwater storage
Reexamination Certificate
active
07451605
ABSTRACT:
In the past, “compensated” salt caverns have operated with a compensating liquid, such as brine to displace a stored liquid, such as crude oil, when the stored liquid is needed on the surface. Virtually all of the stored liquid in a compensated salt cavern can be expelled from the salt cavern when it is filled with the compensating liquid. In the past, “uncompensated” salt caverns have been used to store gases, such as natural gas. Uncompensated caverns operate without any compensating liquid; instead they rely on pressure. Some of the stored gas (cushion gas) must always be left in an uncompensated salt cavern. This invention breaks with convention and uses a compensating liquid in a salt cavern to store gases which is a technique believed to be previously unknown. “Cushion gas” is not required because the compensating liquid displaces virtually all of the gas in the salt cavern.
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American Gas Association: LNG Information Book; 1981; pp. 61-72, Catalog No. X00981; American Gas Association, Arlington, VA U.S.A.
Conversion Gas Imports L.P.
Doerrler William C
Husch Blackwell Sanders LLP
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