Title:
Portable drilling rig
United States Patent 2848196


Inventors:
Simmonds, Wayne W.
Application Number:
US54082155A
Publication Date:
08/19/1958
Filing Date:
10/17/1955
Assignee:
John, Lucas H.
Primary Class:
Other Classes:
52/119, 52/121, 173/28, 173/44, 173/147, 173/159, 173/186, 175/85, 175/122, 175/170, 414/22.57
International Classes:
E21B15/00; E21B19/14
View Patent Images:
US Patent References:
2742260Well derrick1956-04-17
2594098Drilling apparatus1952-04-22
2412020Working platform arrangement for portable derricks1946-12-03
2334312Drilling machine1943-11-16