Title:
Drag bit
Document Type and Number:
United States Patent 3127945

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




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