The picture shows a oil production, equipped with a sucker rod pump (commonly called Donkey pump). For the smallest reservoirs, oil is simply collected in a holding tank and picked up at regular intervals by tanker truck or railcar to be precessed at a refinery.
Other onshore facilities are unconventional production, that target heavy oil, tar sand (oil sand) and fracturing technology for shale oil and gas. Heavy oil and tar sand are producing low value product such as bitumen and parrafin (wax). Besides, it required further extraction due to high sulfur and mineral content.
Shale oil, that's where hydraulic fracturing plays an important role in America's energy supply in new era. (This is interesting topic, author may be discussed special topic later).
