Illustrated description of unit used in servicing wells 2500 to 6000 ft deep; 84 ft two-piece, telescoping derrick with double-drum hoisting unit mounted on 6-wheel drive truck, powered by 150-hp Wankesha engine; derrick raising procedure; guy lines; time saved.
Signal's experience with portable derrick
Petroleum World
Petroleum World ; 38 , n 2
1941
Article (Journal)
English
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