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US 4,538,685 AGranted
Locking annulus safety valve
AssigneeCamco, Incorporated
InventorsRonald E. Pringle, Paul W. Black
Life of this patent
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AssigneeCamco, Incorporated
InventorsRonald E. Pringle, Paul W. Black
Estimating the term…
An annulus subsurface safety valve for installation between inner and outer concentric members and controlling a fluid passageway therein in which the safety valve is locked to the outer member when the fluid passageway is closed. The outer member is provided with a threaded section and the safety valve housing includes a plurality of segments carried for inward and outward movement in which the segments include threads on the outside for coacting with the threaded section. A lock is provided upon the valve closure of the safety valve and positioned to be out of engagement with the segments when the valve is in the open position but is in engagement with and locks the segments outwardly in engagement with the threaded section when the valve is in the closed position. Springs urge the segments outwardly whereby the valve may be ratcheted downwardly into the threaded section and can be released from the threaded section by opening the passageway or can be released by rotation. A metal packing seal around the housing seals against the outer member and is provided with a piston for compressing the packing when exposed to pressure between the members.
In an annulus subsurface safety valve adapted for installation between inner and outer concentric tubular members having a housing for connection to the inner member with a fluid passageway therethrough, valve closure means connected to the housing for opening and closing said passageway, means for controlling movement of the valve closure means including hydraulic actuating means adapted to extend to the surface between the tubular members, the combination of means for locking the housing to the outer member when the fluid passageway is closed comprising,
In an annulus subsurface safety valve adapted for installation between inner and outer tubular members having a housing for connection to the inner member and having a fluid passageway therethrough, valve closure means connected to the housing for opening and closing said passageway, hydraulic control means extending to the surface between the inner and outer members for actuating the valve closure means to the open position, biasing means in the housing for biasing the valve closure means to the closed position when the hydraulic control means is deactuated, the combination of means for locking the safety valve to the outer member when the valve closure means is moved to the closed position comprising,
In a subsurface valve adapted to be installed in a tubular member having a housing and a fluid passageway therethrough, valve closure means connected to the housing for opening and closing said passageway, hydraulic actuating means connected to the valve closure means for moving said valve closure means to the open position and adapted to extend to the surface between the tubular member and the housing, biasing means connected to the hydraulic actuating means for moving the valve to the closed position, the improvement of sealing means for sealing the housing against the tubular member comprising,
Dependencies are inferred from the claim text.