Question:
Which of the following offshore rigs has the HIGHEST water depth of operation?
Which of the following offshore rigs has the HIGHEST water depth of operation?
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Remember: Shallow \(\rightarrow\) Submersible barge; Moderate \(\rightarrow\) Jackup; Deep \(\rightarrow\) Jacket platform; Ultra-deep \(\rightarrow\) Semi-submersible rig.
Updated On: Aug 29, 2025
- Submersible drilling barge
- Jackup rig
- Jacket platform
- Semi-submersible rig
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The Correct Option is D
Solution and Explanation
- Offshore drilling rigs are designed for different water depths.
- Submersible drilling barges are suitable for very shallow waters, typically less than 30 m. Hence, (A) is incorrect.
- Jackup rigs can operate in moderate water depths, usually up to 120 m. They stand on the seabed using legs that can be jacked up or down. Hence, (B) is not the highest.
- Jacket platforms are fixed structures installed on the seabed, generally economical up to about 500 m water depth. They cannot be deployed in very deep waters. Thus, (C) is incorrect.
- Semi-submersible rigs float partially submerged and are anchored or dynamically positioned. They can operate in very deep waters (up to thousands of meters), making them the best suited for highest depth operations. Thus, (D) is correct.
- Submersible drilling barges are suitable for very shallow waters, typically less than 30 m. Hence, (A) is incorrect.
- Jackup rigs can operate in moderate water depths, usually up to 120 m. They stand on the seabed using legs that can be jacked up or down. Hence, (B) is not the highest.
- Jacket platforms are fixed structures installed on the seabed, generally economical up to about 500 m water depth. They cannot be deployed in very deep waters. Thus, (C) is incorrect.
- Semi-submersible rigs float partially submerged and are anchored or dynamically positioned. They can operate in very deep waters (up to thousands of meters), making them the best suited for highest depth operations. Thus, (D) is correct.
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