Induction heating of coal in situ

Details Induction heating of coal in situ Induction heating of coal in situ

1976-07-29

1978-09-26

Novosad, Stephen J.

Wells

Processes

Electric current or electrical wave energy through earth for...

166256, 166302, 299 2, E21B 4324, E21C 4110

Patent

active

041162730

ABSTRACT:
The electric induction heating in situ of a selected portion of an underground coal deposit, for the purpose of facilitating extraction of gases, liquids, solids and energy from the deposit. The heating is conveniently effected by passing a time-varying electrical current through a conductor encompassing the selected portion. The conductive path is preferably a toroid, quasi-toroid, helix, or simulated toroid, quasi-toroid or helix, created by a drilling and passing one or more conductors through the drill holes.

REFERENCES:
patent: 2472445 (1949-06-01), Sprong
patent: 2634961 (1953-04-01), Ljungstrom
patent: 2856292 (1958-10-01), Mann et al.
patent: 2859952 (1958-11-01), Tour et al.
patent: 2923535 (1960-02-01), Ljungstrom
patent: 2939689 (1960-06-01), Ljungstrom
patent: 3379248 (1968-04-01), Strange
patent: 3472987 (1969-10-01), Viart
patent: 3727982 (1973-04-01), Itoh et al.

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