Api BOP
The #BOP stack may be built in a variety of configurations.
American Petroleum Institute (#API) Code to describe stack configurations is contained in API Bulletin #RP53.
The recommended component designation codes for blowout preventer arrangements are as follows:
A = annular type blowout preventer
G = rotating head
R = single ram type preventer with one set of rams, blind or pipe, as operator prefers
Rd = double ram type preventer with two sets of
rams, positioned as operator prefers
Rt = triple ram type preventer with three sets of rams, positioned as operator prefers
CH = remotely operated connector attaching wellhead or preventers to each other
CL= low pressure remotely operated connector attaching the marine riser to BOP stack
S = spool with side outlet connections for choke and kill lines
M = 1,000 psi (68.95 bar) rated working pressure
#Components are listed reading upward from the bottom of the preventer stack. Blowout preventer stacks may be fully identified
by simple designations, such as:
15M–7-1/16” (179.39 mm)–RSRRA
10M–13-5/8” (346.08 mm)–RSRRA
5M–18-3/4”(476.25 mm)–RRRRAA
The first of the previous preventer stacks would be rated 15,000 psi (1034.2 bar) working pressure, would have a bore of 7-1/16 inches (179.39 mm), and would be arranged as in the first example in the figure below.
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