The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1999
Filed:
Jul. 17, 1997
Jean-Gerard Durup, Le Raincy, FR;
Guy Boris, Le Kremlin-Bicetre, FR;
Yvon Charnavel, Rosny-Sous-Bois, FR;
Abstract
The invention concerns a process for excavating by dissolution an underground cavity in a thin salt layer, in order to store a fluid therein. According to the invention, the process includes the steps of producing an injection duct, an extraction duct, and a void for a communication space which places in communication the injection and extraction ducts, producing at least one blind tunnel void communicating with the communication space so as to enable the solvent to circulate and the salt to dissolve in the blind tunnel, injecting via the injection duct a solvent into the communication space, and extracting via the extraction duct the brine formed by the dissolution of the salt on contact with the solvent. The advantage of this process is that the excavated layer has a mechanically stable shape and a larger volume and is produced more cheaply than with prior processes.