Wash-over spear apparatus
United States Patent 2762438
US Patent References:
Reamer
- - 1521596
Overshot
- - 1785152
Apparatus for washing over, releasing, and withdrawing tubular tructures from wells
- - 2449841
Rotary washover shoe
- - 2577605
Pump anchor
- - 2604945
Reamer
- - 1521596
Overshot
- - 1785152
Apparatus for washing over, releasing, and withdrawing tubular tructures from wells
- - 2449841
Rotary washover shoe
- - 2577605
Pump anchor
- - 2604945
Inventors:
Naylor, Cecil A.
Publication Date:
09/11/1956
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Export Citation:
Assignee:
Naylor, Cecil A.
Primary Class:
Other Classes:
175/315, 175/80, 166/215, 166/301
International Classes:
E21B31/00
US Patent References:
| 2647008 | Retrieving arrangement for well drilling operations |