a protective device installed to or around an offshore drilling platform for oil or gas and the device when in operation to encircle or enclose the platform with a floating containment device and attached oil containment curtain hanging from the device to the ocean floor . the pollution containment device to be submerged normally and activated to the surface when needed . this device will entrap offshore platform pollutants in a short amount of time with a minimum amount of effort and will maintain a clean environment . other methods of offshore platform pollution containment devices are shown , including permanent non - moving oil pollution containment barriers and activated barriers that operate internally and externally of the oil platform to form an all encompassing barrier from the ocean floor to above the water surface to hold an oil spill to the platform area . offshore drilling can be environmentally safe .