Elevator latch for drilling rigs

Details Elevator latch for drilling rigs Elevator latch for drilling rigs

1979-10-24

1981-05-19

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

294 90, B66C 110, E21B 1906

Patent

active

042680824

ABSTRACT:
An automatic elevator latch is connected to the elevator of a drilling rig for automatically clamping the drill stem or pipe of the drilling rig. The automatic elevator latch includes a pair of arms connected to the elevator for closing the elevator. The arms are responsive to the operation of a pair of air pots, each of which includes a plunger which moves one of the arms forward on each side of the elevator to close the elevator. The air pots are in turn responsive to a compressed air system which is operated by the derrickman to automatically close the elevator. As a result, the automatic elevator latch of the present invention enables the derrickman to quickly, efficiently and safely close the elevator of a drilling rig.

REFERENCES:
patent: 2684166 (1954-07-01), De Jarnett
patent: 2692059 (1954-10-01), Bolling
patent: 2695189 (1954-11-01), Chrisman et al.

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