Patent ID: 7975482
Filing Date: 2011-07-12
Classification: E21B,F01K,F24T,Y02E

Abstract:
1. A process for creating and/or operating an supercritical geosteam system by several boreholes constructed by a metal-melt boring process that each comprise a metal borehole lining consisting of a casting and continuously produced from the metal-melt medium and in which the boreholes are sunk to depths at which supercritical conditions prevail and the spaced boreholes are connected to each other by fissure formations in the lower shaft area and form a primary circuit wherein the supercritical geosteam system is operated in combination with a hydraulic power plant and that an injection shaft for transporting subcritical primary fluid into the earth is formed by at least one borehole and a production shaft for transporting supercritical primary fluid from the earth is formed by at least one further borehole, which primary fluid is present in the injection shaft in subcritical liquid phase and is present supercritically in the production shafts down to the lower area of the secondary heat exchangers, and that the supercritical primary fluid transmits its heat to secondary heat exchangers for the production of current, power or the production of process steam and/or heat, which secondary heat exchangers are arranged in the upper part of the production shafts, and that subcritical and cooled-down primary fluid develops again from supercritical primary fluid by the removal of heat which subcritical and cooled-down primary fluid still has the same pressure as the supercritical primary fluid.