Discussion on Suitability of Barriers (well control)
this article discuss the suitability of barrier for the following:
- Fluids
- Mechanical Barriers in completed Wells
- Sub-surface Safety Valve
- Sustension of a perforated well (with xmas tree)
- Sub Sea Well Suspensions
- Two Way Check Valve (TWCV)
1. Fluids as a Barrier
Only drilling mud can be defined as a truly independent fluid well barrier. It has the fundamental requirements of both overbalance and a method of sustaining the fluid column by means of the mud . . .