NOVELTY - The apparatus has a piping system for bringing contents from a surface of a well into a heat nest. A closed-loop solid state heat exchange extracts geothermal heat from the well without exposing rock with permeable fluid content. The closed-loop solid state heat exchange provides heated contents to the piping system for processing. An enhanced oil recovery apparatus receives the heated content and processes the heated content to deliver heat to oil in an oil reservoir to decrease viscosity of the oil and increase oil recovery of the oil in the oil reservoir.    USE - Apparatus for providing an SWEGS in enhanced oil recovery in oil fields, oil storage tanks and oil pumping systems for applications. Uses include but are not limited to water purification applications or heat for leaching process in mining applications, greenhouse applications, fish farming applications, cooling/heating applications, remediation applications and pasteurization and brewing applications.    ADVANTAGE - The apparatus uses the SWEGS generated geothermal heat instead of fossil fuel to create heat and using steam to deliver heat into heavy oil deposit, thus significantly improving oil recovery and oil viscosity. The apparatus provides lower viscosity and improved flow rate without burning of fuel, so that the apparatus reduces transportation cost of feed stock. The apparatus eliminates usage of water and increases recovered oil from existing and depleted fields by 40 to 60%.    DETAILED DESCRIPTION - The heated content includes heated fluid or steam. The apparatus allows heat conductive material selected from a group consisting of rods, heat pipes, mesh of wires, beads/spheres, foam, plastics, ceramics, crystals, closed loops, metals, carbons, powders and fluids. An INDEPENDENT CLAIM is also included for a method for providing a single-well engineered geothermal system (SWEGS) in enhanced oil recovery in oil fields.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of an apparatus for providing an SWEGS in enhanced oil recovery in oil fields.