Cantilevered mast drilling rig with single step erection

Details Cantilevered mast drilling rig with single step erection Cantilevered mast drilling rig with single step erection

1984-03-23

1986-04-01

Kelly, Donald G.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52116, E04H 1234

Patent

active

045789118

ABSTRACT:
A cantilevered mast drilling rig is disclosed in which the erection operation for elevating the cantilevered mast and the drill rig floor to the elevated operating positions is a single step procedure. Both the cantilevered mast and the drill rig floor are completed on the ground prior to the elevating operation. The drill rig floor is pinned to the cantilevered mast so that, in response to actuation of the drawworks, the mast and drill rig floor are elevated to their operating positions as a single unit in a single operation.

REFERENCES:
patent: 3271915 (1966-09-01), Woolslayer et al.
patent: 3803780 (1974-04-01), Donnally
patent: 3922825 (1975-12-01), Eddy et al.
patent: 4135340 (1979-01-01), Cox et al.
patent: 4375241 (1983-03-01), Gallon
patent: 4473977 (1984-10-01), Reed
patent: 4478015 (1984-10-01), Lawrence et al.
patent: 4489526 (1984-12-01), Cummins
Dresser Ideco HFM 142-1000.
Dreco, "Slingshot".
Olympic Iron Works Limited, "Swing Lift".
Branham Industries, Inc., "Swinglift".

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