Formation-tailored method and apparatus for uniformly heating lo

Details Formation-tailored method and apparatus for uniformly heating lo Formation-tailored method and apparatus for uniformly heating lo

1984-04-06

1986-02-18

Novosad, Stephen J.

Wells

Processes

Heating, cooling or insulating

166 60, 166 72, 166385, 166 651, 219415, E21B 2300, E21B 3604

Patent

active

045707154

ABSTRACT:
Long intervals of subterranean earth formations are heated at high temperatures for long times with an electrical heater containing spoolable, steel sheathed, mineral insulated cables which have high electrical conductivities, enabling them to heat the earth formations at a substantially uniform rate of more than about 100 watts per foot at temperatures between about 600.degree. and 1000.degree. C., with a pattern of localized electrical resistances which are correlated with the heat conductivities of the earth formations and the heat stabilities of materials providing power and support for the heater.

REFERENCES:
patent: 2500513 (1950-03-01), Bowman
patent: 2732195 (1956-01-01), Ljungstrom
patent: 2781851 (1957-02-01), Smith
patent: 2893490 (1959-07-01), Wiliams et al.
patent: 3114417 (1963-12-01), McCarthy
patent: 3131763 (1964-05-01), Kunetka et al.
patent: 3207220 (1965-09-01), Williams
patent: 3522847 (1970-08-01), New
patent: 4440219 (1984-04-01), Engelder

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