Draw works disabling device for use with a well drilling apparat

Details Draw works disabling device for use with a well drilling apparat Draw works disabling device for use with a well drilling apparat

1981-02-20

1983-09-13

Pate, III, William F.

Wells

Above ground apparatus

Well caps or casing heads

175 27, 175 38, 173 3, 173 4, 254273, E21B 700

Patent

active

044036558

ABSTRACT:
A device for disabling the draw works of a well drilling apparatus responsive to the locking of the drill string by a blow out prevention device. The device comprises an air-actuated valve connected for regulating the flow of air to the air-actuated clutch of the draw works. A second valve regulates the flow of pressurized air to the air actuated valve. The second valve is responsive to the actuation of the blow out prevention device by an accumulator valve.

REFERENCES:
patent: 1891329 (1932-12-01), Le Compte
patent: 3044481 (1962-07-01), Regan
patent: 3104864 (1965-09-01), Melton et al.
patent: 3552502 (1971-01-01), Wilson
patent: 3677352 (1972-07-01), Lloyd
patent: 3746102 (1973-07-01), Griffin
patent: 4144953 (1979-03-01), Johnson
patent: 4337653 (1982-07-01), Chauffe

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