Cable sling arrangement for pivoting a drilling mast and drawwor

Details Cable sling arrangement for pivoting a drilling mast and drawwor Cable sling arrangement for pivoting a drilling mast and drawwor

1982-09-07

1984-10-23

Raduazo, Henry E.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52116, E04H 1234

Patent

active

044780150

ABSTRACT:
A drilling mast and drawworks elevator are pivotally secured to a substructure support with a frame secured to the support and extending upwardly between the drilling mast and elevator support. A cable on a rotatable drum on the drawworks elevator extends from a traveling block in the drilling mast, around the drilling mast crown block, to a drum on the drawworks elevator, and a hook is suspended by the traveling block in the drilling mast. Sheaves are mounted adjacent the upper end of the frame. Mast raising sheaves are mounted in the drilling mast as are deflection sheaves, and a slingline equalizer is connected with the hook means, with sheaves positioned thereon.
A pair of cable slings, each of which has one cable end connected to the drilling mast with the other cable end connected to the drawworks elevator, extends continuously and respectively from their respective connections with the drilling mast to extend over one of the frame sheaves, under one of the mast raising sheaves, around one of the deflection sheaves, around one of the sheaves in the equalizer means, then around another deflection sheave, underneath another mast raising sheave, over another frame sheave to extend to the connection on the drawworks elevator.

REFERENCES:
patent: 2695081 (1954-11-01), Woolslayer
patent: 2706540 (1955-04-01), Woolslayer
patent: 3271915 (1966-09-01), Woolslayer
patent: 3803780 (1974-04-01), Donnally
patent: 4221088 (1980-09-01), Patterson
patent: 4269009 (1981-05-01), Lawrence
patent: 4292772 (1981-10-01), Borg

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