Title:
Portable well servicing rig
United States Patent 2612242


Inventors:
Munsinger, Theodor R.
Application Number:
US6252748A
Publication Date:
09/30/1952
Filing Date:
11/29/1948
Assignee:
Munsinger, Theodor R.
Primary Class:
Other Classes:
52/118, 52/119, 52/143
International Classes:
E21B15/00
View Patent Images:
US Patent References:
2470998Portable mast1949-05-24
2354922Portable derrick1944-08-01
2344390Raising and lowering mechanism1944-03-14
2335584Portable foldable mast structure1943-11-30
2210407Portable derrick1940-08-06
2204716Portable derrick mast1940-06-18
0725964N/A1903-04-21
0470112N/A1892-03-01