Safety valve for horizontal tree

Details Safety valve for horizontal tree Safety valve for horizontal tree

1995-02-10

1996-11-19

Tsay, Frank

Wells

Valves, closures or changeable restrictors

Rotated operator

166 951, 251309, E21B 3412

Patent

active

055753361

ABSTRACT:
A safety valve for use in a horizontal christmas tree is disclosed which comprises a valve element rotatably mounted in a valve body for opening and closing a flow path through the valve body. A seal is provided between the valve body and valve element and defines a sealing surface at which all points are spaced equidistant from the valve body rotational axis. A hydraulic actuator is also provided for rotating the valve element.

REFERENCES:
patent: 2710066 (1955-06-01), Johnston et al.
patent: 4210207 (1980-07-01), McStravick et al.
patent: 4434967 (1984-03-01), Vanderburg
patent: 4508173 (1985-04-01), Read
patent: 4513823 (1985-04-01), Hynes et al.
patent: 4522266 (1985-06-01), Barrington
patent: 4700782 (1987-10-01), Read
patent: 4703807 (1987-11-01), Weston
patent: 5305988 (1994-04-01), Cox

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