HOW OFFSHORE OIL RIGS ATTACH TO THE OCEAN FLOOR Offshore oil rigs are huge engineering structures designed to explore and extract oil and gas beneath the ocean floor. To remain stable in harsh marine environments, they must be firmly secured to the seabed. The method of attachment depends on the water depth and environmental conditions. In shallow waters, fixed platforms are commonly used. These platforms have long steel or concrete legs that are driven deep into the seabed, providing a permanen