Blowout Preventer Blowout Preventer The second line of defense for the workers and the well to prevent a blowout is the group of equipment called blowout preventers (BOPs). BOPs and associated valves are installed on top of the casing head before drilling ahead after rigging up. These high-pressure safety valves and associated equipment are designed to shut off the well hole and prevent the escape of the underground fluids and prevent a blowout from occurring. fossil fuel, extraction, exploration, offshore, drilling, BP, Deepwater Horizon, spill, safety, environmental degradation 2012-03-01 image/svg+xml Blowout Preventer 2012-03-01 Integration and Application Network https://ian.umces.edu/media-library/blowout-preventer/ https://ian.umces.edu/media-library/blowout-preventer/ en-US fossil fuel, extraction, exploration, offshore, drilling, BP, Deepwater Horizon, spill, safety, environmental degradation The second line of defense for the workers and the well to prevent a blowout is the group of equipment called blowout preventers (BOPs). BOPs and associated valves are installed on top of the casing head before drilling ahead after rigging up. These high-pressure safety valves and associated equipment are designed to shut off the well hole and prevent the escape of the underground fluids and prevent a blowout from occurring.