Which rig has a folding mast that can be lowered and raised quickly?

Which rig has a folding mast that can be lowered and raised quickly?

• A. Submersible Rig
• B. Cable Tool Rig
• C. Jack Knife Rig
• D. Rotary Rig

Answer: (C)

The main idea here is rapid mast handling and mobility: some rigs are built so the derrick or mast can be folded for quick transport and then quickly raised back into drilling position. The rig that fits this description uses a derrick designed to jackknife or hinge, allowing the mast to be lowered and raised quickly. This design lets crews move between sites with minimal setup time, which is exactly what “folding and quick-lowering/raising” implies. Other rigs use fixed or slowly erected masts and aren’t built for the same speed of setup and relocation. A folding, quickly operable mast is the hallmark of a jackknife rig, making it the best fit for this scenario.

The main idea here is rapid mast handling and mobility: some rigs are built so the derrick or mast can be folded for quick transport and then quickly raised back into drilling position. The rig that fits this description uses a derrick designed to jackknife or hinge, allowing the mast to be lowered and raised quickly. This design lets crews move between sites with minimal setup time, which is exactly what “folding and quick-lowering/raising” implies.

Other rigs use fixed or slowly erected masts and aren’t built for the same speed of setup and relocation. A folding, quickly operable mast is the hallmark of a jackknife rig, making it the best fit for this scenario.