Apparatus having a releasable lock

Details Apparatus having a releasable lock Apparatus having a releasable lock

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 34/06 (2006.01) E21B 34/08 (2006.01) E21B 34/10 (2006.01)

Patent

CA 2269402

Apparatus including a releasable lock is provided. In a described embodiment, a valve assembly includes a ball valve, a piston, and a releasable lock. The releasable lock prevents operation of the ball valve until a predetermined fluid pressure is applied to the exterior of the apparatus.

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