Oil recovery system and method

摘要: A slotted radiating unit is lowered into a well casing of limited cross section, and microwave energy fed downwardly thereto via transmission line also installed in the casing. Two embodiments are disclosed, two described. Depending upon subterranean conditions, periods on off propagation sometimes employed; some instances dual radio frequencies utilized to enhance petroleum flow. Subsurface sensors made use control ground level frequency generator (or generators).