Wells – Processes – In situ combustion
Patent
1994-09-16
1996-02-06
Buiz, Michael Powell
Wells
Processes
In situ combustion
166 59, E21B 3602
Patent
active
054889901
ABSTRACT:
A downhole burner that economically generates hot inert gas and injects this gas into a subterranean formation. The burner has a nipple attached to a first tubing string that carries an oxidizer to the burner. The first tubing string also contains a coil tubing string that carries fuel to a movable nozzle inside the nipple. A small orifice in the nozzle increases the velocity of the fuel, and the nozzle extends out through a small orifice in a burner shroud that increases the velocity of the oxidizer flowing around the nozzle. The high velocity of the fuel and oxidizer keeps the flame front below the shroud and nozzle. A second tubing string supplies coolant gas around the burner shroud. Injection of an oxygen containing coolant gas provides a method for enhancing in situ combustion reactions through superheating the oxygen containing mix of coolant and exhaust gas.
REFERENCES:
patent: 4137968 (1979-02-01), Howard et al.
patent: 4205725 (1980-06-01), Howard et al.
patent: 4380265 (1983-04-01), Mohaupt
patent: 4454915 (1984-06-01), York et al.
patent: 4945984 (1990-08-01), Price
patent: 5255742 (1993-10-01), Mikus
Compton Albert C.
Ellwood David E.
Wadleigh Eugene E.
Buiz Michael Powell
Ebel Jack E.
Hummel Jack L.
Marathon Oil Company
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