Wiper for drill pipes having a lubricant cavity
United States Patent 2611146
US Patent References:
/0445569.html
- - 0445569

Combined casing head, oil saver, and tubing lander
- - 1641921

Tubing stripper
- - 1823233

Bottle wiper
- - 2147250

Mud wiper
- - 2215377


Inventors:
Buckley, John L.
Publication Date:
09/23/1952
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Assignee:
US RUBBER CO
Primary Class:
15/220.400
Other Classes:
15/245, 15/104.040
International Classes:
E21B33/08; E21B33/02