Downhole steam generator with improved preheating/cooling features. [Patent application]

Title: Downhole steam generator with improved preheating/cooling features. [Patent application]

Full Record
Other Related Research

Abstract

An apparatus is described 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 combustormore »« less

Inventors:: Donaldson, A B; Hoke, D E; Mulac, A J

Issue Date:: 1980-10-10

OSTI Identifier:: 6432989

Assignee:: Dept. of Energy

DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 02 PETROLEUM; 42 ENGINEERING; OIL WELLS; STEAM INJECTION; STEAM GENERATORS; DESIGN; EQUIPMENT; COMBUSTORS; LIQUID FUELS; NOZZLES; BOILERS; ENHANCED RECOVERY; FLUID INJECTION; FUELS; RECOVERY; THERMAL RECOVERY; VAPOR GENERATORS; WELLS; 020300* - Petroleum- Drilling & Production; 420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)

Citation Formats


                    Donaldson, A B, Hoke, D E, and Mulac, A J. Downhole steam generator with improved preheating/cooling features. [Patent application].  United States: N. p., 1980. 
        Web.

Copy to clipboard


                    Donaldson, A B, Hoke, D E, & Mulac, A J. Downhole steam generator with improved preheating/cooling features. [Patent application].  United States.

Copy to clipboard


                    Donaldson, A B, Hoke, D E, and Mulac, A J. Fri .  
        "Downhole steam generator with improved preheating/cooling features. [Patent application]".  United States.

Copy to clipboard


                    
@article{osti_6432989,

  title        = {Downhole steam generator with improved preheating/cooling features. [Patent application]},

  author       = {Donaldson, A B and Hoke, D E and Mulac, A J},

  abstractNote = {An apparatus is described 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         = {1980},

  month        = {10}

}

Copy to clipboard

Patent:

Search for the full text at the U.S. Patent and Trademark Office

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Downhole steam generator with improved preheating/cooling features

Patent Donaldson, A Burl [Albuquerque, NM]; Hoke, Donald E [Albuquerque, NM]; Mulac, Anthony J [Tijeras, NM]

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 combustormore »« less
Full Text Available
Downhole steam generator with improved preheating, combustion, and protection features

Patent Fox, R L

For tertiary oil recovery, a downhole steam generator is designed which provides for efficient counterflow cooling of the combustion chamber walls and preheating of the fuel and water. Pressure-responsive doors are provided for closing and opening the outlet in response to flameout, thereby preventing flooding of the combustion chamber. (DLC)
Downhole steam generator with improved preheating, combustion and protection features

Patent Fox, Ronald L [Albuquerque, NM]

An apparatus for generation of steam in a borehole for penetration into an earth formation wherein feedback preheater means are provided for the fuel and water before entering the combustor assembly. First, combustion gases are conducted from the combustion chamber to locations in proximity to the water and fuel supplies. Secondly, both hot combustion gases and steam are conducted from the borehole back to the water and fuel supply. The water used for conversion to steam is passed in a countercurrent manner through a plurality of annular water flow channels surrounding the combustion chamber. In this manner, the water ismore »« less
Full Text Available
Downhole steam injector. [Patent application]

Patent Donaldson, A. B.; Hoke, E.

An improved downhole steam injector has an angled water orifice to swirl the water through the device for improved heat transfer before it is converted to steam. The injector also has a sloped diameter reduction in the steam chamber to throw water that collects along the side of the chamber during slant drilling into the flame for conversion to steam. In addition, the output of the flame chamber is beveled to reduce hot spots and increase efficiency, and the fuel-oxidant inputs are arranged to minimize coking.
Full Text Available
Downhole refractive-index logging device. [Patent application]

Patent Yu, J. S.

This invention provides an antenna arrangement for accurately measuring the magnetic permeability of earth formations. It provides a high-resolution coil array of a transmitting coil and six receiving coils to enable self-consistency checks for evaluating tight gas and oil-bearing strata. (DLC)
Full Text Available

Similar Records