Fluid storage and production

1. A debrining and fluid storage system comprising:

a flow control assembly having:

a subassembly including an annular safety valve;

a shroud;

a bushing connecting the shroud to the subassembly at one of two opposing ends of the shroud; and

another bushing connecting the shroud to the subassembly at the other of the two opposing ends of the shroud;

a debrining string having a seal disposed within the assembly, the debrining string further including a safety valve.

2. The system as claimed in claim 1 wherein the safety valve of the debrining string is actuated through a hydraulic passthrough nipple in the subassembly.

3. The system as claimed in claim 1 wherein the debrining string includes two seals straddling the safety valve of the debrining string.

4. A system comprising:

a borehole in a formation extending to a salt cavern;

a string in the borehole, the string including the debrining and fluid storage system as claimed in claim 1 .

5. A method for debrining a salt cavern comprising:

pumping a fluid through the debrining and fluid storage system as claimed in claim 1 ,

removing brine from the salt cavern through the debrining string.

6. The method as claimed in claim 5 , further including removing the debrining string from the assembly while under pressure.

7. The method as claimed in claim 6 further comprising operating a snubbing unit to remove the debrining string.

8. The method as claimed in claim 5 , further comprising isolating an environment outside of the assembly from hydrogen.