API 16A Cammeron Annular Bop For Well Control

Blowout Preventers

Blowout Preventer (BOP) is safety devices used to "prevent" the uncontrolled flow of liquids and gases during well drilling operations.

Blowout preventer is large, high-pressure valves that are capable of being remotely controlled. When the driller closes the valve, a pressure-tight seal is formed at the top of the well, preventing the fluids from escaping. There are two major types of Blowout Preventers, Annular (also known as Spherical) and RAM. Annular BOPs are usually mounted to the very top of the BOP stack. The drilling crew then mounts two, three, or four RAM BOPs below the Annular preventer. If a kick is detected, the annular is usually closed first and then the RAM is used as a backup if the Annular should fail
API 16A Cammeron Annular Bop For Well Control