Blowout Preventers - an overview | ScienceDirect Topics
3/7/2012· M.Rafiqul Islam, M.Enamul Hossain, in Drilling Engineering, 2021. 184.108.40.206.3 Blowout preventer stack. The BOP stack is the assely of drilling-control equipment connected to the top of the casing head. The basic items of the BOP stack are blind ram preventer, pipe ram preventer, annular preventer, drilling spool, kill line, choke flowline, bell nipple, and fill line.