Wells – With heating – refrigerating or heat insulating means – Burner in well
Patent
1981-01-07
1983-06-28
Novosad, Stephen J.
Wells
With heating, refrigerating or heat insulating means
Burner in well
431157, 431162, E21B 4324
Patent
active
043900623
ABSTRACT:
An apparatus for generation of steam in a borehole for penetration into an earth formation wherein a spiral, tubular heat exchanger is used in the combustion chamber to isolate the combustion process from the water being superheated for conversion into steam. The isolation allows combustion of a relatively low pressure oxidant and fuel mixture for generating high enthalpy steam. The fuel is preheated by feedback of combustion gases from the top of the combustion chamber through a fuel preheater chamber. The hot exhaust gases of combustion at the bottom of the combustion chamber, after flowing over the heat exchanger enter an exhaust passage and pipe. The exhaust pipe is mounted inside the water supply line heating the water flowing into the heat exchanger. After being superheated in the heat exchanger, the water is ejected through an expansion nozzle and converts into steam prior to penetration into the earth formation. Pressure responsive doors are provided at a steam outlet downstream of the nozzle and close when the steam pressure is lost due to flameout.
REFERENCES:
patent: 3204696 (1965-07-01), De Priester et al.
patent: 3759329 (1973-09-01), Ross
patent: 4243098 (1981-01-01), Meeks et al.
Fox et al., "Analysis of the Injection of Steam into Deep Reservoirs for Recovery of Tertiary Oil, 17th Aerospace Sciences Meeting, New Orleans, LA, Jan. 1979, (Sandia Laboratories Public. SAND-0202).
Novosad Stephen J.
The United States of America as represented by the United States
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