20
Drilling Spool
API requirements: 1) W.P. consistent with BOP’s. 2) One or more side outlets, no smaller than 2 in. with p. rating consistent with BOP stack. 3) Vertical bore dia. At least equal to the max. internal dia. of the innermost (uppermost) casing.
Should be installed first
9
Ram Type B.O.P.
Blind rams are designed to be closed on openhole.
10
Ram Type B.O.P.
Blind-Shear rams are designed to cut, or shear, pipe & form a seal on the resulting openhole. They are primarily used in subsea preventer stacks, where it may be necessary for the rig to move off location because of weather or other factors.
Flexpacker
15
Ram Type B.O.P.
Most ram manufacturer offer a variable bore ram, or multi ram, which has the capability to seal on several pipe sizes.