Oil rig

An oil rig is a human-constructed device and structure used to extract the liquid energy source known as oil from the Earth, often to be transported by pipelines and oil tankers. Hard hats are usually required headwear for humans based on oil rigs.

Oil rigs often attract the attention of Decepticons for a variety of reasons.

Fiction

Marvel The Transformers comics

Blackrock Enterprises was in possession of a high-tech oil rig off the coast of Oregon, which was assaulted by Shockwave and the operational Decepticons under his command, capturing it to become a temporary Decepticon base of operations. The Worse of Two Evils!