1.Drilling rigs: Used for on-land oil drilling
2. Drillships: Floating rigs used for offshore drilling
3.Compliant towers: Tall, narrow concrete and steel structures used for depths of 1500–4900 ft
4.Tension leg platforms
1.Drilling rigs: Used for on-land oil drilling
2. Drillships: Floating rigs used for offshore drilling
3.Compliant towers: Tall, narrow concrete and steel structures used for depths of 1500–4900 ft
4.Tension leg platforms