Surface controlled subsurface safety valve

Details Surface controlled subsurface safety valve Surface controlled subsurface safety valve

E - Fixed Constructions

21

B

255/25, 166/41

E21B 34/10 (2006.01) E21B 34/00 (2006.01)

Patent

CA 1317280

SURFACE CONTROLLED SUBSURFACE SAFETY VALVE Abstract of the Disclosure A surface controlled subsurface safety valve for use in a well tubing string including a valve closure member, an operator tube for opening the valve closure member, a small diameter offset piston to move the operator tube in response to control fluid pressure conducted from the well surface, and a spring biasing the operator tube to a position closing the valve. A bearing assembly mounted on the operator tube minimizes eccentric and torsional loading of the operator tube by the piston means and spring. The operator tube also has multiple flow paths and barriers to prevent accumulation of debris from well fluids within the safety valve. The safety valve has metal-to-metal sealing systems to improve valve life under harsh downhole well environments.

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