Wells – Processes – Placing or shifting well part
Patent
1988-03-07
1989-01-10
Novosad, Stephen J.
Wells
Processes
Placing or shifting well part
166 664, 166332, 25112915, 340854, E21B 3406, E21B 3416, G01V 140
Patent
active
047967080
ABSTRACT:
A downhole safety valve for a subterranean well comprises an axially shiftable valve head which is movable between open and closed positions by an actuating member. The actuating member is axially shifted by a device mechanism which is manipulated by an electric motor. The electric motor is preferably actuated by downhole batteries and the energization and de-energization of the electric motor is preferably controlled from the well surface by electromagnetic waves. A locking mechanism engages the actuating member of the safety valve in its open position through the energization of an electric solenoid, also preferably controlled from the well surface by electromagnetic waves.
REFERENCES:
patent: 3737845 (1973-06-01), Maroney et al.
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3961308 (1976-06-01), Parker
patent: 3967201 (1976-06-01), Rorden
patent: 4191248 (1980-03-01), Huebsch et al.
patent: 4373582 (1983-02-01), Bednar et al.
patent: 4566534 (1986-04-01), Going, III
patent: 4579177 (1986-04-01), Going, III
patent: 4687054 (1987-08-01), Russell et al.
patent: 4736791 (1988-04-01), Rorden et al.
Baker Hughes Incorporated
Novosad Stephen J.
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