Safety valve system with retrievable equalizing feature

Details Safety valve system with retrievable equalizing feature Safety valve system with retrievable equalizing feature

E - Fixed Constructions

21

B

166/41

E21B 34/02 (2006.01) E21B 23/03 (2006.01) E21B 34/10 (2006.01) E21B 34/14 (2006.01)

Patent

CA 1188981

ABSTRACT OF THE DISCLOSURE In accordance with an illustrative embodiment of the present invention, a surface controlled subsurface safety valve system includes a tubing retrievable safety valve having a valve element that is opened and held open in response to the pressure of a control fluid in a control line and automatically closed when control pressure is reduced, and means for equalizing the pressure of fluids above and below said valve element to aid in reopening the same after closure, including a wireline retrievable equal- izing valve removably installed in the pocket of a side pocket mandrel that is connected in the tubing above said safety valve, said equalizing valve being arranged to be opened and closed in response to changes in the pressure of said control fluid. A uniquely constructed side pocket mandrel also is disclosed.

393515

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