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Title: Downhole steam generator with improved preheating/cooling features

Abstract

An apparatus for downhole steam generation employing 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 two concentric water channels, one defined by the space between the inner combustor sleeve and an intermediate sleeve, and the second defined by the space between the intermediate sleeve and an outer cylindrical housing. 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. An annular water ejector with a plurality of nozzles is provided to direct water downwardly into the combustor unit atmore » the boundary of the combustion zone and along the lower section of the intermediate sleeve.« less

Inventors:
 [1];  [1];  [2]
  1. (Albuquerque, NM)
  2. (Tijeras, NM)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
864749
Patent Number(s):
4411618
Assignee:
Donaldson, A. Burl (Albuquerque, NM);Hoke, Donald E. (Albuquerque, NM);Mulac, Anthony J. (Tijeras, NM) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
downhole; steam; generator; improved; preheating; cooling; features; apparatus; generation; employing; dual-stage; preheaters; liquid; fuel; water; heat; exchange; jacket; surrounds; oxidant; mixing; section; combustor; assembly; downstream; nozzle; contacts; top; unit; receiving; directly; combustion; stage; upper; portion; supply; line; adjacent; compression; results; pressurization; inner; sleeve; wall; defines; zone; surrounded; concentric; channels; defined; space; intermediate; outer; cylindrical; housing; connected; annular; passage; countercurrent; nature; flow; provides; efficient; ejector; plurality; nozzles; provided; direct; downwardly; boundary; fuel nozzle; jacket surrounds; annular passage; steam generation; water flow; cylindrical housing; combustor assembly; inner wall; steam generator; combustion zone; heat exchange; upper portion; liquid fuel; supply line; outer cylindrical; mixing section; downhole steam; provides efficient; flow provides; wall defines; improved preheating; compression heat; /431/166/

Citation Formats

Donaldson, A. Burl, Hoke, Donald E., and Mulac, Anthony J. Downhole steam generator with improved preheating/cooling features. United States: N. p., 1983. Web.
Donaldson, A. Burl, Hoke, Donald E., & Mulac, Anthony J. Downhole steam generator with improved preheating/cooling features. United States.
Donaldson, A. Burl, Hoke, Donald E., and Mulac, Anthony J. Sat . "Downhole steam generator with improved preheating/cooling features". United States. https://www.osti.gov/servlets/purl/864749.
@article{osti_864749,
title = {Downhole steam generator with improved preheating/cooling features},
author = {Donaldson, A. Burl and Hoke, Donald E. and Mulac, Anthony J.},
abstractNote = {An apparatus for downhole steam generation employing 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 two concentric water channels, one defined by the space between the inner combustor sleeve and an intermediate sleeve, and the second defined by the space between the intermediate sleeve and an outer cylindrical housing. 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. An annular water ejector with a plurality of nozzles is provided to direct water downwardly into the combustor unit at the boundary of the combustion zone and along the lower section of the intermediate sleeve.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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