Preheater mounted within a well
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United States of America Patent
Stats
-
Nov 16, 1982
Grant Date -
N/A
app pub date -
Oct 10, 1980
filing date -
May 23, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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A preheater is disclosed which can be inserted and withdrawn from a well tube defining a curved passage, without having its heating element damaged, by utilizing the flexibility of a spirally coiled structure having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.
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Family
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Cited Art Landscape
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