Title:
Drag bit
United States Patent 3127945
Inventors:
Bridwell, Harold C.
Rowley, David S.
Publication Date:
04/07/1964
Export Citation:
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Assignee:
JERSEY PROD RES CO
Primary Class:
175/434
International Classes:
E21B10/54; E21B10/46
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US Patent References:
2846193Milling cutter for use in oil wells
2833520Annular mill for use in oil wells
1977128Hard facing
1799318Method of making fishtail bits
Foreign References:
GB806406A