Title:
Well heater
United States Patent 2500513
Inventors:
Bowman, Hyman D.
Publication Date:
03/14/1950
Export Citation:
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Assignee:
Bowman, Hyman D.
Primary Class:
166/177.7
Other Classes:
166/60, 166/214, 166/243, 219/523, 392/301
International Classes:
E21B36/04; E21B36/00
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US Patent References:
2244256Apparatus for clearing wells
1841068Portable circulation and heating apparatus for tanneries
1504208Electrical heater for oil wells
1309721N/A
0421883N/A