Subsurface safety valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Reexamination Certificate

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Details

C166S386000, C166S373000, C166S317000

Reexamination Certificate

active

10366593

ABSTRACT:
A subsurface safety valve assembly for controlling fluid flow in a wellbore. In one embodiment, the subsurface safety valve assembly includes a tubular member having a longitudinal bore extending therethrough, a flapper removably connected to the tubular member. The flapper is configured to pivot against the tubular member between an open position and a closed position. The subsurface safety valve assembly further includes a flow tube disposed inside the tubular member and a shear sleeve having an upper end and a lower end. The upper end of the shear sleeve is positioned against a lower end of the flow tube to form a first seal between the upper end of the shear sleeve and the lower end of the flow tube.

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U.K. Search Report, Application No. GB0403024.3, dated May 28, 2004.
U.K. Search Report, Application No. GB0403024.3, dated Oct. 5, 2004.

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