Annular Blowout Preventers - Offshore Drilling - Rig Worker
2021-4-28 · The annular blowout preventer (BOP) is the most widely used blowout preventer in the oilwell drilling industry. The purpose of BOP 's in general is to close the well bore in the event that the well starts a kick. Ram preventers historically are limited to either blind rams which are closed to control the well (provided no tools are in the well ...
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