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:
Dec. 08, 2015
Filed:
Feb. 13, 2012
Sebastian Briechle, Frankenthal, DE;
Tillmann Faust, Weisenheim Am Sand, DE;
Stephan Freyer, Neustadt, DE;
Rajan Hollmann, Bad Essen, DE;
Tobias Käppler, Maxdorf, DE;
Bernd Leonhardt, Kassel, DE;
Julia Kristiane Schmidt, Heidelberg, DE;
Benjamin Wenzke, Hamburg, DE;
Foppe Visser, Baunatal-Grossenritte, DE;
Sebastian Briechle, Frankenthal, DE;
Tillmann Faust, Weisenheim Am Sand, DE;
Stephan Freyer, Neustadt, DE;
Rajan Hollmann, Bad Essen, DE;
Tobias Käppler, Maxdorf, DE;
Bernd Leonhardt, Kassel, DE;
Julia Kristiane Schmidt, Heidelberg, DE;
Benjamin Wenzke, Hamburg, DE;
Foppe Visser, Baunatal-Grossenritte, DE;
WINTERSHALL HOLDING GMBH, Kassel, DE;
Abstract
A two-stage process for mineral oil production from mineral oil deposits with a deposit temperature of more than 70° C. and a salinity of 20 000 ppm to 350 000 ppm, in which an aqueous formulation comprising at least one glucan with a β-1,3-glycosidically linked main chain, and side groups β-1,6-glycosidically bonded thereto and having a weight-average molecular weight Mof 1.5*10to 25*10g/mol, are injected into a mineral oil deposit through at least one injection borehole and crude oil is withdrawn from the deposit through at least one production borehole. The aqueous formulation is prepared in two stages, by first preparing an aqueous concentrate of the glucan, and diluting the concentrate on site with water to the use concentration.