Canal and oil well: what they have in common

1. Step 1. Canal — uses — Boat. For vessels.
2. Step 2. Boat — uses — Archimedes’ principle. A vessel stays afloat by Archimedes’ principle.
3. Step 3. Archimedes’ principle — is used in — Offshore drilling platform. Floating platforms.
4. Step 4. Offshore drilling platform — has part — Drilling rig. A drilling rig.
5. Step 5. Drilling rig — is used in — Oil well. A well is drilled by a rig.

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