System for providing uniform heating to subterranean formation for recovery of mineral deposits

A method for heating a subterranean mineral formation, the method comprising:

• placing a casing within in a bore in the subterranean mineral formation, the casing having an outer surface and an inner surface, a heating element positioned within the casing, and a heat transfer fluid contained within the casing;
• supplying power to the heating element;
• and
• causing at least a portion of the heat transfer fluid to undergo phase changes between liquid and gas in order to regulate a temperature of the casing, the heat transfer fluid transferring heat from the heating element to the casing.

A heating system for a subterranean mineral formation, the heating system comprising:

• a casing positioned in a bore in the subterranean mineral formation, the casing having an outer surface and an inner surface;
• a heating element positioned within the casing;
• wherein the casing is at least partially immersed in a boiling fluid in the bore of the subterranean mineral formation, wherein the boiling fluid enhances heat transfer from the outer surface of the casing to the subterranean mineral formation;
• and
• a plurality of fins on the outer surface of the casing, the plurality of fins configured to enhance a rate of heat transfer between the casing and the subterranean mineral formation.