Patent ID: 7784533

Claim:
A downhole-combustion unit, disposed in a drill hole and below a ground surface, the unit adapted for receiving a fuel and water mixture and a compressed air and steam mixture, the two mixtures when ignited creating a high pressure, high temperature, thermal energy carder fluid (TECF) therein and injecting the TECF into a hydrocarbon permeable zone next to a lower portion of the drill hole, the unit comprising: a well-bore outer casing, the outer casing cemented in place in the drill hole; a well-bore inner casing, the inner casing disposed inside the outer casing and suspended from the ground surface, the inner casing having injection holes in a lower portion thereof; the inside of the lower portion of the inner casing with injection holes providing a combustion chamber, the inner casing adapted for receiving the air and steam mixture under pressure therein; an outer annulus disposed between the outer casing and the inner casing, the annulus adapted for receiving the fuel and water mixture under pressure therein, the fuel and water mixture received through the injection holes into the combustion chamber; and ignition means suspended from the ground surface and inside the inner casing for igniting the fuel and water mixture and the air and steam mixture inside the combustion chamber thereby creating the TECF, the TECF exiting out an open bottom of the inner casing and into the permeable zone.