SPREAD - Sharing Practices Rigorously, Easily Accelerates Delivery

Hi my friends,

We are designing a completion for a sour Gas well = 10,000 ppm H2S, 28 % CO2 with 4200 psi BHP with 4 1/2" completion tubing.
For the subsurface safety valve (inconel material) there are 2 types :

One with a self equalising feature and the other is without.

a. SSSV with self equalising --> some statements say that the equalising feature is important, to equalise pressure before opening the valve.

b. SSSV without self equalising --> some statements say that the equalising port (of the self-equalising valve) can become an additional leak for sour gas, and that the port can be eroded during gas flow.

I'd appreciate your comments and experience on this.

Thanks.

Dany Rizka
Medco-Energi
Jakarta, Indonesia