System for drilling the ground to obtain circulation of fluid in a plant for the exploitation of geothermal energy
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United States of America Patent
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app pub date -
Jan 3, 2007
filing date -
Jan 13, 2006
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Abandoned
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Abstract
A system for high-depth drilling of the ground aimed at reaching hot rocks for extraction of geothermal energy by means of introduction of a heat-conveying fluid and extraction thereof after adequate heating uses just one borehole containing two coaxial tubes: an internal tube (3, 11, 13), through which the cold fluid is introduced, and an external or coating tube (4, 6), through which said fluid returns to the surface after it has been heated by the hot rocks either directly or through said coating tube.
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