Drilling apparatus
United States Patent 2586878
US Patent References:
Offset-cutting tool
- - 1795553
Counter boring tool
- - 1955631
Whipstock
- - 1970761
Whip stock
- - 2108419
Method and apparatus for orienting tools
- - 2120670
Offset-cutting tool
- - 1795553
Counter boring tool
- - 1955631
Whipstock
- - 1970761
Whip stock
- - 2108419
Method and apparatus for orienting tools
- - 2120670
Inventors:
Staton, James C.
Publication Date:
02/26/1952
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Assignee:
Eastman, Oil Well Survey Compan
Primary Class:
Other Classes:
175/388, 175/289
International Classes:
E21B7/08
US Patent References:
| 2327658 | Method of and means for orienting tools in well bores |