The Number That Decides Your Profit Isn't the Purchase Price
When you buy a drilling rig, you negotiate the purchase price once. Then you pay the running cost every working day for the next decade. Fuel, parts, labour, transport — these are the numbers that quietly decide whether each borehole makes money. And over the long run, they tend to move in one direction.
You Can't Bet Your Business on the Pump Price
Fuel is the clearest example. It swings month to month for reasons no contractor controls — in mid-2026, diesel actually eased while petrol hit record highs, and a few months either way the picture can flip again. Across the years, though, the trend for diesel, steel, components and wages is upward. You can't plan a drilling business around a good month at the fuel station. What you can plan around is how much your rig consumes in the first place — and that's engineered in long before you arrive on site.
Three Running Costs Your Rig Choice Controls
1. Fuel — mostly your compressor. On a DTH rig, the air compressor is the biggest diesel burner on the job. Match it to the holes you actually drill and you can run roughly 40% cheaper on fuel than an oversized setup — every hole, every day. Drilling a 120 m job with a rig sized for 400 m means paying that fuel premium for capacity you're not using.
2. Parts and serviceability — downtime is lost revenue. A rig that's broken down isn't neutral; it's actively losing you money. We build field-serviceable machines with no complex electronics to chase, designed around standard parts you can source in local African markets — not long-lead imports that strand you for weeks. The cheapest repair is the one a competent mechanic finishes on site the same day.
3. Crew and mobilisation — recurring, every job. Labour and transport repeat on every single hole. Our rigs run with a crew of one operator and one assistant, where bigger machines need three or four. They drive to site in a single trip — no lowbed, no separate transport bill. Those savings compound across a year of drilling.
Do the Maths on Cost Per Metre
South African drilling is priced by the metre — in regions like Limpopo, often around R300. Your profit on that rate is whatever's left after running costs. Two contractors can charge the same price and earn completely different margins — the difference is fuel burned, days lost to breakdowns, and crew on the payroll. Lower the running cost and you lift the margin on every metre, without charging the customer a cent more.
Buy for the Decade, Not the Day
The purchase price is a headline. The operating cost is the story. A rig that's a little cheaper to buy but thirsty, fragile, and crew-hungry will cost you far more over its life than one engineered to run lean. That's the whole idea behind how we build at Drillbuilders — rugged, simple, right-sized machines designed for the real economics of African drilling.
Want to work out the running cost on the rig you're considering? Call Neels on 083 854 2781 or email sales@drillbuilders.com. We'll run the numbers for your depth range and ground conditions before you spend a rand.