Telescoping derrick

Details Telescoping derrick Telescoping derrick

1984-02-06

1986-05-27

Friedman, Carl D.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Longitudinally extensible by flexible drive or hoist

52632, 254336, B66C 2306

Patent

active

045907200

ABSTRACT:
A heavy duty drilling mast or derrick made of a plurality of elements which telescope one into another so that the derrick can be raised from a collapsed position to an extended position with vertical axis by means of a plurality of four cables--one in each corner of the derrick. Each element is a rectangular box with open top and bottom, and each element can be locked to its upper and lower neighbors in the extended position so as to provide a strong, rigid derrick for drilling deep wells. Each element can be removed from the assembly and carried by helicopter from one location to another.

REFERENCES:
patent: 2763339 (1956-09-01), North
patent: 3000473 (1961-09-01), Reynolds
patent: 3327997 (1967-06-01), Zenke
patent: 3366407 (1968-01-01), Cernosek

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