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Annular vs Ram BOP — Decision Guide
Answer 5 questions about your well program to see whether an annular preventer, a ram preventer, or a combined stack fits — reasoning drawn from the Decision Matrix above, not a generic quiz.
1. Does the pipe or tool-joint size in the hole change during the operation you’re planning for?
2. Do you need to strip pipe through a closed BOP while maintaining pressure control?
3. Do you need the ability to fully shut in the well with no pipe present (open hole)?
4. Do you need emergency full-bore shear capability (cut and seal on the drill pipe)?
5. Where does this unit sit in your stack?
