Semi-submersible rigs are floating platforms used in offshore drilling for oil and gas. They are designed with large, buoyant columns that keep the rig stable on the water's surface, even in rough seas. This stability allows for drilling operations to continue safely and efficiently. These rigs are anchored to the seabed with mooring lines, which helps prevent them from drifting. Semi-submersible rigs can operate in deep waters, making them suitable for exploring underwater resources. Their unique design allows them to withstand harsh weather conditions, ensuring reliable performance in various marine environments.