Title:
Subsurface igniter
United States Patent 2771140
US Patent References:
/0957785.html
- - 0957785

/1726041.html
- - 1726041

Oil well furnace
- - 2506853

Oil well heater
- - 2632836

Apparatus for heating oil wells
- - 2647196


Inventors:
Barclay, Harry A.
Nichols, Dean P.
Publication Date:
11/20/1956
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Assignee:
SOCONY MOBIL OIL CO INC
Primary Class:
166/60
Other Classes:
392/301, 219/267, 166/256
International Classes:
E21B36/02; E21B36/04; E21B36/00