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:
Feb. 16, 2016
Filed:
Sep. 07, 2012
Vladimir Stehle, Kassel, DE;
Konrad Siemer, Kassel, DE;
Liubov Altunina, Tomsk, RU;
Vladimir Kuvshinov, Tomsk, RU;
Ivan Kuvshinov, Tomsk, RU;
Vladimir Stehle, Kassel, DE;
Konrad Siemer, Kassel, DE;
Liubov Altunina, Tomsk, RU;
Vladimir Kuvshinov, Tomsk, RU;
Ivan Kuvshinov, Tomsk, RU;
Abstract
Mineral oil is produced from underground mineral oil deposits by injecting one or more flooding media into an injection well and withdrawing mineral oil from a production well. Highly permeable zones are blocked in the region between the injection well and the production well by separately injecting, in succession, two different aqueous formulations, one having water and urotropin and the other having water and urea, through the injection well into the deposit. The two different aqueous formulations mix in the formation after injection to form viscous gels. Either or both formulations have at least one further metal or semimetal compound that can form gels when admixed with bases. The injection well temperature is not more than 60° C.