What are the three types of platform rigs?

What are the three types of platform rigs?

• A. Floating spar, Tension-leg platform, Jackup
• B. Steel-Jacket platform, caisson type, concrete gravity type
• C. Monopole, Semi-submersible, Drillship
• D. Floating production system, Barge, FPSO

Answer: (B)

Offshore platform rigs are built to stay put on the seabed, and one major way to categorize them is by their fixed structural type. The three common fixed platform types are steel-jacket platforms, caisson-type platforms, and concrete gravity-type platforms. A steel-jacket platform uses a steel lattice framework with legs that reach down to the seabed and is anchored in place, with the deck resting on top of the jacket. A caisson-type platform relies on a large hollow cylinder, or caisson, driven into the seabed to provide stability for the deck. A concrete gravity-type platform is a massive concrete structure that relies on its own weight to remain in place on the seabed, without extensive piling. The other options describe floating rigs or production systems rather than fixed platform types, so they aren’t the correct group for “three types of platform rigs.”

Offshore platform rigs are built to stay put on the seabed, and one major way to categorize them is by their fixed structural type. The three common fixed platform types are steel-jacket platforms, caisson-type platforms, and concrete gravity-type platforms.

A steel-jacket platform uses a steel lattice framework with legs that reach down to the seabed and is anchored in place, with the deck resting on top of the jacket. A caisson-type platform relies on a large hollow cylinder, or caisson, driven into the seabed to provide stability for the deck. A concrete gravity-type platform is a massive concrete structure that relies on its own weight to remain in place on the seabed, without extensive piling.

The other options describe floating rigs or production systems rather than fixed platform types, so they aren’t the correct group for “three types of platform rigs.”