Flapper type annulus pressure responsive tubing tester valve

Details Flapper type annulus pressure responsive tubing tester valve Flapper type annulus pressure responsive tubing tester valve

E - Fixed Constructions

21

B

166/42

E21B 34/10 (2006.01) E21B 47/10 (2006.01)

Patent

CA 1272683

ABSTRACT The tubing tester valve of the present invention comprises a tubular housing assembly having a downwardly closing, spring biased flapper valve disposed therein near the top thereof. A tubular mandrel assembly is disposed within the housing assembly below the flapper valve, and is secured to the housing assembly with shear pins. The tubing tester valve may be permanently opened through the application of annulus pressure from the rig floor to the annulus surrounding the pipe string, which pressure moves the mandrel assembly upward to rotate the flapper valve to an open position. In order to assure that the mandrel assembly does not retract downwardly, thus permitting the flapper valve to reclose, a spring biased locking means is provided to hold the mandrel assembly in its "up" position.

538679

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