Hydraulically operated drilling platform
United States Patent 2852111
US Patent References:
Derrick substructure
- - 2429010

Telescoping tower
- - 2576389

Portable well servicing rig
- - 2612242


Inventors:
Fuller, Roger E.
Henderson, Lawyer E.
Publication Date:
09/16/1958
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Assignee:
Fuller, Roger E.
Henderson, Lawyer E.
Primary Class:
52/115
Other Classes:
52/119, 52/126.100, 52/143
International Classes:
E21B15/00