Preheater mounted within a well

Details Preheater mounted within a well Preheater mounted within a well

1980-10-10

1982-11-16

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219278, 219381, 219536, 338229, 166 60, H05B 380

Patent

active

043596274

ABSTRACT:
A preheater is disclosed which can be inserted and withdrawn from a well tube defining a curved passage, without having its heating element damaged, by utilizing the flexibility of a spirally coiled structure having increased stability of shape and excellent capacity of restoring its original shape after elastic deformation.

REFERENCES:
patent: 969849 (1910-09-01), Dyer
patent: 1086646 (1914-02-01), Christian
patent: 2055500 (1936-09-01), McLeod
patent: 2507750 (1950-05-01), Barlow
patent: 2518265 (1950-08-01), Adamson
patent: 2888546 (1959-05-01), Kinney
patent: 3731058 (1973-05-01), Bleiweiss

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