Title:
Well repair
United States Patent 2495352

Inventors:
Smith, Ralph H.
Publication Date:
01/24/1950
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Assignee:
DOW CHEMICAL CO
Primary Class:
166/277
Other Classes:
166/291, 29/402.010, 138/97
International Classes:
E21B33/134; E21B33/13
US Patent References:
2219319Treatment of wells
2312862Method and apparatus for completing wells
2372461Apparatus for placing gravel in wells
2447629Apparatus for forming a section of casing below casing already in position in a well hole
Foreign References:
GB190406507A