Abstract: This invention uses a combination of drilling, dissolving, and sinking to emplace a closed end well pipe into a salt formation. The well which results can be used to produce geothermal power or for such other purposes for which it may offer an advantage. This method uses the following combination of properties of salt to achieve the desired result: solubility in water, plasticity at relatively low temperatures, and occurrence in large, deeply penetrating structures.

Abstract: The heat control production system and method for an oil well utilizes a noncorrosive gas compatible with crude oil fire hazards to provide an insulating annulus between the production tubing string of an oil well and the bore hole or casing or other tubing string surrounding the production tubing string by pressurizing the insulating annulus from the source of gas such that crude oil from the oil reservoir enters the insulating annulus and interfaces with the gas intermediate the surface and the oil reservoir whereby the insulating annulus provides minimal heat transfer to allow the crude oil produced through the production tubing string to reach the surface at a preselected temperature up to the oil reservoir temperature which avoids undesirable precipitation or gelling of paraffinic hydrocarbons from heat loss to the overburden of the oil well.

Abstract: The Thermal Extraction System and Method utilizes a geothermal heat source to provide thermal energy at the surface by drilling a bore hole into the geothermal heat source and equipping the bore hole with a casing and multiple tubing strings. A cavern is formed in the geothermal heat source, such as a brine cavern. One of the tubing strings is a production tubing string used to produce hot brine at the surface and has a low thermal conductivity fluid surrounding the production tubing string which may be adjusted to maintain an interface with brine from the cavern at varying levels around the production tubing string and thereby provides temperature regulation of the brine. This invention contemplates the production of brine at the surface which may be used in heat transfer applications or processed as feed stock for salt production with unsaturated brine returned to the brine cavern where it becomes saturated.