Downhole steam generator with improved preheating/cooling features

Patent · Tue Oct 25 00:00:00 EDT 1983

OSTI ID:6269411

Donaldson, A B; Hoke, D E

An apparatus for down-hole steam generation employs dual-stage preheaters for liquid fuel and for the water. A first heat exchange jacket for the fuel surrounds the fuel/oxidant mixing section of the combustor assembly downstream of the fuel nozzle and contacts the top of the combustor unit of the combustor assembly, thereby receiving heat directly from the combustion of the fuel/ oxidant. A second stage heat exchange jacket surrounds an upper portion of the oxidant supply line adjacent the fuel nozzle, receiving further heat from the compression heat which results from pressurization of the oxidant. The combustor unit includes an inner combustor sleeve, whose inner wall defines the combustion zone. The inner combustor sleeve is surrounded by 2 concentric water channels. The channels are connected by an annular passage adjacent the top of the combustor assembly, and the countercurrent nature of the water flow provides efficient cooling of the inner combustor sleeve. (3 claims.

• Assignee: Dept. of Energy
• Patent Number(s): US 4411618
• OSTI ID: 6269411
• Resource Relation: Patent File Date: Filed date 10 Oct 1980
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
IN-SITU COMBUSTION
STEAM GENERATORS
DESIGN
COMBUSTORS
ENHANCED RECOVERY
PETROLEUM
STEAM GENERATION
UNDERGROUND
BOILERS
CHEMICAL REACTIONS
COMBUSTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
IN-SITU PROCESSING
LEVELS
OXIDATION
PROCESSING
RECOVERY
THERMOCHEMICAL PROCESSES
VAPOR GENERATORS
WELLS
020300* - Petroleum- Drilling & Production