Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Roddie R. Smith0
Date of Patent
February 2, 2010
Patent Application Number
11384720
Date Filed
March 20, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
The present invention generally provides a method and apparatus for selectively sealing a bore. The tubular valve generally includes a closing member for seating in and closing the bore, and a pressure-actuated, retention member having first and second opposed piston surfaces opening and closing the valve. The tubular valve prevents sudden loss of pressure in the tubular and is controllable from the surface.
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