Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1983-11-23
1986-07-01
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
Fluid operated
166334, 166217, E21B 3410
Patent
active
045974462
ABSTRACT:
A safety valve for installation in a well to close the passage for effluent therefrom comprises a valve body of generally cylindrical shape, shut-off element in a lower part of this body, and a cylindrical slideblock which is slidable longitudinally in the body and adapted to cause, in its descending movement, the opening of the shut-off element. A locking system for locking the valve in the well is located in a radially outer portion of the body and comprises a radially expandable attachment component for engaging, when expanded, in a stop groove provided in the receiving connection of the well surrounding the body. Upper and lower sealing elements for sealing against the receiving connection are arranged on radially outer regions of the body for forming between them a space for receiving a control fluid for the valve, the two sealing elements being arranged longitudinally one on each side of the locking system.
REFERENCES:
patent: 3078923 (1963-02-01), Tausch
patent: 3517743 (1970-06-01), Pumpelly et al.
patent: 4134455 (1979-01-01), Read
patent: 4161985 (1979-07-01), Fournier et al.
patent: 4296807 (1981-10-01), Hendrickson et al.
patent: 4428557 (1984-01-01), Yonker et al.
Compagnie Francaise des Petroles
Goodwin Michael A.
Novosad Stephen J.
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