Patent ID: 6247313
Filing Date: 2001-06-19
Classification: E21B,F24T,Y02E

Abstract:
A plant for exploiting geothermal energy by circulating water through a geological formation at least 1000 m below the earth surface, comprising at least one supply hole leading from the surface down to said formation, at least one return hole for the transport of heated water from said formation to the surface, and a heat absorbing arrangement connecting the supply and return holes, said arrangement comprising a heat transfer surface across which heat is transferred from said formation to said water, said heat transfer surface comprising at least one drilled heat absorbing hole characterized in that the plant has a given nominal power in MW defined as the heat to be absorbed by said arrangement after one year of operation, and in that the length of said heat absorbing hole is at least about 2600 m multiplied by said nominal power.