Setting a TRSCSSSV at 4,500mTVD

Dear members,

Our Petroleum Technologist wants to run 4-1/2” tubing instead of 3-1/2”. The problem is a 4-1/2”, 10kpsi TRSCSSSV will not fit in the already-installed 7” casing. He has suggested we run 4-1/2” tubing from surface and crossover to 3-1/2” just above the packer at 4,500mTVD. This would allow us to run a 3-1/2” TRSCSSSV at 4,500mTVD. My concerns are;-

 1)    Do TRSCSSSVs work on the end of a 4,500m control line?

2)    Are the closing / opening times much longer?

3)    Is this common? I have never heard of anyone setting a TRSCSSSV this deep

4)    What is the time to transmit pressure (or bleed-off pressure) along 4,500m of control line

Your comments and thoughts on this would be most appreciated, especially from anyone who has addressed and overcome this challenge.

Kind regards

Allan

2 Answer(s)

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