Wells – Valves – closures or changeable restrictors
Patent
1978-11-13
1980-06-03
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
166 53, 166 59, 166 64, 166251, E21B 4324
Patent
active
042057256
ABSTRACT:
A method for assembling an ignition system for in situ combustion operation to recover petroleum from a well in a subterranean reservoir, and an ignition system for an elongated combustion chamber suspended from a hollow electrical cable and which cable supplies both electrical means and fuel gas to the chamber. Air inlet ducts in the walls of the air inlet cylinder receive air from the annular space between the hollow cable and the wellbore tubing. An electrical ignitor is temporarily energized automatically or responsive to a thermocouple detecting no burning in the combustion chamber to ignite the fuel-air mixture in the combustion chamber. The ignitor is responsive to the thermocouple detecting burning in the combustion chamber for extinguishing the ignitor. The thermocouple is thus responsive to a flameout for re-energizing the ignitor either manually or automatically such that burner operation is interrupted only momentarily.
This new method includes further the steps of electrically connecting a second thermocouple to a limit set means and forming it responsive to the thermocouple for causing the flow of additional secondary air to be automatically increased to cool the electronics portion of the burner if the temperature therein goes beyond safe limits.
REFERENCES:
patent: 2506853 (1950-05-01), Berg et al.
patent: 3109482 (1963-11-01), O'Brien
patent: 3216498 (1965-11-01), Palm
patent: 3298439 (1967-01-01), Rees, Jr.
patent: 3982591 (1976-09-01), Hamrick et al.
patent: 4079784 (1978-03-01), Howard et al.
Calvin Douglas G.
Howard Curtis E.
Pitts, Jr. Robert W.
Nichols Theron H.
Novosad Stephen J.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
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