Drilling rig machine for soil investigation

Geotechnical drill rigs are specialized equipment for the rigorous demands of construction and geological projects. These rigs play a key role in geotechnical investigation, providing the capability to assess ground conditions. [pdf]

City skylines small oil drilling rig

Of the four industry specializations in Cities: Skylines Industries (farming, forestry, ore, and oil), oil is unlocked last. You’ll need to have reached the Busy Town milestone to unlock it. To do that, you’ll wa. [pdf]