Definition(s)
Blowout Preventer Stack
Complete assembly of well control equipment, including preventers, spools, valves, and nipples connected to the top of the wellhead or wellhead assemblies, consisting of the lower marine riser package (LMRP) and lower stack.
Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards
Blowout Preventer Stack
Complete assembly of well control equipment, including preventers, spools, valves, and nipples, connected to the top of the wellhead or wellhead assemblies.
Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
Blowout Preventer Stack
The assembly of well control equipment including preventers, spools, valves and nipples connected to the top of the wellhead.
Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards
Blowout Preventer (BOP) Stack
The assembly of well control equipment including preventers, spools, valves, and nipples connected to the top of the casing-head that allows the well to be sealed to confine well fluids to the wellbore.
Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards
Blowout Preventer Stack
The complete assembly of well control equipment, including preventers, spools, valves, and nipples connected to the top of the wellhead or wellhead assemblies.
Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards
Blowout Preventer Stack
“Blowout preventer stack” means the assembly of well control equipment including preventers, spools, valves, and nipples connected to the top of the casinghead
carrier.
Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations