Electrical down-hole heating devices help enhance the recovery of thick waxy oil, heavy oil, bitumen, natural gas, hydrocarbons, and related commodities by lowering the viscosity and raising the pressures of the surrounding fluid and gas. In addition, the use of the more energy efficient electrical heat can help reduce the amount, and in some cases eliminate the use altogether, of less energy efficient steam to heat the oil. The higher power density superconducting down-hole heating system can enable the in-situ generation of steam down-hole within the confines of the well-bore. The in-situ generation of steam with this device has multiple benefits including reductions in capital costs of the above ground steam plant, increased energy efficiency, reduced greenhouse gas emission, and minimizing water usage and its corresponding reclamation costs. Common types of electrical down-hole heaters include: a) radiative type, b) inductive type, or c) resistive type. A superconducting down-hole heater has many advantages over conventional normal conducting down-hole heaters including: higher power transmission density, higher recovery fluid and gas throughput, increased energy efficiency, higher production capacity per well-bore, and more environmentally friendly fluid and natural gas extraction. Down-hole heaters involving superconductors and cryogenically cooled non-superconductors are disclosed. Additional enhancements involving coil rotation and/or vibration, well-casing rotation and/or vibration, and direct current power sources are disclosed.
In addition, superconducting cables used to transmit large amounts of electric power to facilitate fracturing of shale and rock in subterranean down-hole wells is disclosed.