Title:
Portable drilling rig
United States Patent 2848196
US Patent References:
Drilling machine
- - 2334312
Working platform arrangement for portable derricks
- - 2412020
Drilling apparatus
- - 2594098
Well derrick
- - 2742260
Drilling machine
- - 2334312
Working platform arrangement for portable derricks
- - 2412020
Drilling apparatus
- - 2594098
Well derrick
- - 2742260
Inventors:
Simmonds, Wayne W.
Publication Date:
08/19/1958
View Patent Images:
Export Citation:
Assignee:
John, Lucas H.
Primary Class:
Other Classes:
414/22.570, 52/121, 173/186, 175/85, 173/28, 52/119, 173/147, 173/44, 173/159, 175/122, 175/170
International Classes:
E21B15/00; E21B19/14; E21B19/00