Geothermal underground energy source - has single pipe for conveying water to and returning steam from underground chamber

摘要

The method of obtaining energy from geothermic heat uses a single borehole which is sunk to a suitable depth where an underground chamber is formed by explosives. This depth is sufficient for water to be passed down to the chamber for conversion into steam which is forced back to the surface under pressure. The tube used inside the borehole has a central bore postioned concentrically inside an outer tube, spaced from it by radial ribs with spaces between. Water can then be passed downwards through the spaces between inner and outer tubes, and steam is forced up inside the inner tube.