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Heated well production string
United States Patent 2954826
US Patent References:
/0495936.html
- - 0495936
Electric heater for liquids
- - 2211380
Apparatus for recovering sulphur
- - 2268978
Electric oil well heater
- - 2500305
Electric oil well tubing heater
- - 2525314
Inventors:
Sievers, William E.
Publication Date:
10/04/1960
View Patent Images:
Download PDF 2954826
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Assignee:
Sievers, William E.
Primary Class:
166/60
Other Classes:
392/483, 219/390, 219/553, 392/306
International Classes:
E21B36/04
;
E21B36/00
US Patent References:
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