When surface deposits run dry, your colony's survival depends on subterranean extraction. The automatic drilling rig—commonly known as the deep drill—is your primary tool for securing late-game minerals like plasteel, gold, and uranium when your map's mountains and open ground have been completely stripped. Without a solid understanding of how to pair it with scanning technology, you'll waste valuable time and risk catastrophic resource shortages.
Setting up an efficient subterranean extraction operation requires more than just dropping a machine onto the dirt. You need specific research prerequisites, active ground scanning, strategic placement, and defense mechanisms to handle the unexpected hazards hidden deep beneath the crust. Let's break down how to get your extraction pipeline running smoothly from scratch.
Research Prerequisites and Infrastructure
You can't build a deep drilling setup right away. Progression through the research tree is mandatory before your colonists can peer beneath the surface.
First, you need to research Electricity and standard manufacturing tech to build basic components. Next, push your research bench toward Moisture pump and Ground-penetrating scanner technologies. The ground-penetrating scanner is the brain of the operation; it requires a powered console and a pawn assigned to intellectual tasks to locate underground riches.
Once your researcher spots a deposit, you'll unlock the ability to construct the deep drill itself. Keep in mind that deep drills require a steady power supply to function efficiently, and they generate a significant amount of work time for your mining colonists.
Locating Underground Resources
The ground-penetrating scanner doesn't just show you where ore is; it generates random resource patches across your entire map tile once built and powered.
Select the scanner or a deep drill to highlight these subsurface resource nodes on your map. They appear as colored square overlays on the terrain. Each patch contains a finite amount of a specific resource, such as:
- Steel: The lifeblood of base expansion, defensive walls, and mechanoid assembly.
- Plasteel: Essential for advanced components, spacer-tier armor, and high-tech ship parts.
- Silver and Gold: Crucial for trading with orbital ships and friendly faction settlements.
- Uranium: Necessary for nuclear power generation and uranium slug turrets.
When you click on a highlighted patch, the game tells you what resource it holds and how many units remain in that specific pocket.
Positioning and Operating Your Deep Drills
Placement dictates efficiency. You must place the deep drill directly over one of the highlighted resource squares revealed by your scanner.
A standard drill extracts resources within its immediate footprint, meaning you'll need to reposition the machine or build multiple units to drain large multi-tile deposits. Because colonists spend hours standing at the drill pounding away at the bedrock, you should optimize their work environment.
- Roofing: Always build a roof over your deep drills. If it rains or snows, your working pawns get uncomfortable and unhappy, leading to mental breaks.
- Comfort: Place a chair or stool facing the drill so your miners gain comfort while working.
- Hauling Proximity: Set up a nearby designated stockpile or zone for raw chunks and minerals so haulers don't waste half their day moving materials across the map.
Pairing your miners with bionic enhancements like a drill arm dramatically increases extraction speed, turning a slow slog into a steady stream of valuable ore.
Managing Insect Infestations and Hazards
Subterranean extraction isn't entirely safe. Digging too deep into the planet's crust always carries risks, particularly from ancient indigenous lifeforms.
When your colonists operate deep drills, there is a distinct chance that they will trigger an insectoid infestation. Unlike mountain mining bugs that spawn from thick overhead roofs, drill-triggered infestations can burst out directly underneath or beside the drilling rig, catching your workers off guard.
To mitigate this threat, never leave a single unarmored miner isolated at a remote outdoor drill. Build defensive walls, bottleneck corridors, or turrets near your drilling sites. Having a quick-response melee blocker ready to hold a doorway can save your favorite colonists from being overwhelmed by aggressive megaspiders.
Frequently Asked Questions
Can deep drills run infinitely on a single spot?
No. Every resource patch discovered by the ground-penetrating scanner has a fixed pool of resources. Once your colonists extract every unit from that specific square, the patch dries up completely and the drill stops producing. You must relocate the drill to a new green square found by your scanner.
Do deep drills need power to operate?
Yes. Deep drills require a continuous electrical connection to function. If your colony suffers a brownout or a solar flare, the drill shuts down instantly until power is restored.
How do I stop colonists from wandering off the drill?
Deep drilling tasks take a long time per unit extracted. If your colonists have low recreation or high fatigue, they will abandon the task mid-day. Ensure their schedules include adequate recreation time and that their working conditions feature comforts like chairs, lighting, and temperature control.
Are long-range mineral scanners better than deep drills?
They serve different purposes. The long-range mineral scanner forces you to form caravans and mine resources on temporary maps, whereas deep drills extract resources directly from your home base map, keeping your colonists safe from outside ambushes. For official game data and mechanics breakdowns, check the Ludeon Studios Wiki or the Steam RimWorld Hub.
