Ignition system for an automatic burner for in situ combustion f

Details Ignition system for an automatic burner for in situ combustion f Ignition system for an automatic burner for in situ combustion f

1977-09-28

1979-02-06

Novosad, Stephen J.

Wells

Automatic

166 59, 166 65R, 166 66, 166302, E21B 4324

Patent

active

041379683

ABSTRACT:
For in situ combustion operation to recover petroleum from a well in a subterranean reservoir, 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.
Secondary air is automatically increased to cool the electronics portion of the burner if the temperature therein gets above safe limits.

REFERENCES:
patent: 2506853 (1950-05-01), Berg et al.
patent: 2668592 (1954-02-01), Piros et al.
patent: 3109482 (1963-11-01), O'Brien
patent: 3298439 (1967-01-01), Rees, Jr.
patent: 3982591 (1976-09-01), Hamrick et al.

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