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