Master Drilling Lands First Portuguese Job at Neves-Corvo

Master Drilling has been awarded a contract by copper and zinc producer Boliden Somincor to construct two raisebored shafts, each 630 metres deep and 4.5 metres in diameter, marking the drilling contractor's first project in Portugal.

Master Drilling has signed its first contract in Portugal, agreeing to construct two raisebored shafts for copper and zinc producer Boliden Somincor. Each shaft will be sunk to 630 metres and finished at 4.5 metres in diameter. The company described the award as an important milestone as it continues to widen its footprint across Europe.

No contract value was disclosed. But the physical specification alone tells you a good deal about the job: two excavations of that depth and diameter are permanent mine infrastructure, not exploration work, and they are the sort of scope a producer commits to only when it intends to keep hoisting, ventilating or hauling through those openings for years.

What Raiseboring Actually Involves

Raiseboring is a method of creating a vertical or steeply inclined shaft between two levels of an underground mine without sending people into the opening as it is formed. A small-diameter pilot hole is drilled downward from the upper level to a target excavation below. A reaming head, wider than the pilot hole, is then attached at the bottom and pulled back up by the rig on surface or on the upper level, cutting the shaft to full diameter as it climbs. The broken rock falls away and is mucked out at the bottom.

The appeal is safety and repeatability. Conventional shaft sinking with drill-and-blast puts crews at the face; raiseboring keeps them out of it. The trade-off is that the method demands accurate pilot-hole steering over long distances, competent enough ground to stand unsupported, and a rig with the torque and thrust to pull a large reaming head through hundreds of metres of rock. At 630 metres and 4.5 metres across, both of those requirements are being tested.

Two shafts to the same depth and diameter also suggests paired function — a common configuration underground is one opening for intake air or hoisting and a second for exhaust or services. Master Drilling has not detailed the end use, and the mine operator has not published one.

Why Neves-Corvo Matters to the Copper Picture

Boliden Somincor is the operator of Portugal's principal copper and zinc mine in the Iberian Pyrite Belt, and the contract places Master Drilling inside one of continental Europe's few large base-metals producers. That matters for context: European copper and zinc supply is concentrated in a small number of long-life underground operations, and each of those operations depends on continuous capital spending to open new mining horizons as upper levels are exhausted.

Shaft work of this kind is the physical expression of that spending. An operator does not commission 630-metre raises to trim costs in a weak year; it commissions them to reach ore that is deeper than the ore it is mining now, or to move more air and material than the existing openings allow. In that sense the award is a datapoint on the durability of the mine's development pipeline, quite apart from what it earns the contractor.

The broader backdrop is a copper market where refined supply has been repeatedly disrupted by concentrate availability and where deeper, hotter, more ventilation-hungry underground mines are the norm rather than the exception. Ventilation capacity, in particular, has become a hard constraint on production at depth. Raiseboring contractors sit directly in that bottleneck.

The European Order Book Question

Master Drilling's business is built on moving specialised rigs and crews between jurisdictions, and its historic strength has been in Southern Africa and Latin America. A first award in a new country is therefore worth more than its own revenue line — it establishes the contractor with an operator that runs mines elsewhere, and it puts equipment and trained people inside a region where the next tender can be bid from a standing start rather than from scratch.

That is the logic of a footprint strategy. The mobilisation cost of getting a raisebore rig, spares, drill string and a competent crew to a new site is substantial and largely fixed. Spread across one contract, it is a drag on margin. Spread across a sequence of contracts in the same country or the same corporate group, it becomes a competitive advantage against a rival bidding from another continent. The value of the Portuguese award to Master Drilling, in other words, depends heavily on whether a second European job follows it.

The specification of the work also argues for repeat business. Contractors that can demonstrate delivery of a 4.5-metre raise over 630 metres — completed straight, on schedule and without a stuck reaming head — carry that reference into every subsequent prequalification. Deep-shaft raiseboring is a reference-driven market. As International Mining reported, the company itself framed the award in terms of European expansion rather than as a standalone project.

What Is Not Yet Known

Several of the commercially important details remain undisclosed. There is no published contract value, no stated start date, no completion schedule and no confirmation of which rigs will be deployed or whether they will be shipped in or sourced regionally. Nor has the end use of the two shafts been specified.

Those gaps set the watch list. For the contractor, the figures that matter are the revenue recognised from the work and whether the Portuguese entry is followed by further mandates in Europe. For observers of the mine, the relevant question is what the new openings unlock — additional ventilation capacity, access to a deeper mining front, or both — and on what timetable that translates into ore.

Taken together, the two shafts represent 1,260 metres of raisebored excavation on an illustrative combined basis, a figure derived simply by doubling the stated depth. It is a large single scope by any measure, and for a contractor arriving in a country for the first time, an unusually public one.

Where the Wider Market Stood

Neither company's shares featured in the licensed benchmark data available for this story, but the equity backdrop into the last session was firm. As of the close on Friday, 11 September 2026, the S&P 500 tracker (NYSEARCA: SPY) finished at $764.29, up 0.85% on the day from a prior close of $757.83. The Nasdaq 100 tracker (NASDAQ: QQQ) ended at $714.88, up 0.87%, and the Dow 30 tracker (NYSEARCA: DIA) closed at $525.79, up 0.97%. Those are last traded prices; the market was closed at the time of writing.

Mining services awards rarely move broad indices, and this one will not. Its significance is narrower and more durable: a contractor has opened a new national market, and a European base-metals producer has committed capital to infrastructure that will outlast the current price cycle.

Key facts

• Scope: Two raisebored shafts for Boliden Somincor
• Shaft dimensions: 630 m deep, 4.5 m diameter each
• Significance: Master Drilling's first project in Portugal
• Benchmark close: S&P 500 tracker SPY $764.29, +0.85%, as of 11 Sep 2026 20:00 GMT

Frequently asked questions

What has Master Drilling been contracted to do?

Master Drilling has signed a contract with copper and zinc miner Boliden Somincor to construct two raisebored shafts. Each shaft will be 630 metres deep and 4.5 metres in diameter. It is the company's first project in Portugal, and it has described the award as an important milestone as it expands its footprint across Europe.

How much is the contract worth?

No contract value has been disclosed. The announcement covered the technical scope — two shafts, each 630 metres deep and 4.5 metres in diameter — but did not include a monetary figure, a start date or a completion schedule. Without those details, the revenue contribution to Master Drilling cannot be quantified from the information made public.

What is raiseboring and why is it used?

Raiseboring creates a shaft between two underground levels without crews working at the face. A small pilot hole is drilled downward, a wider reaming head is fixed at the bottom, then pulled back up to cut the shaft to full diameter. It is favoured for safety and consistency, but it requires accurate pilot-hole steering and competent ground.

What are the shafts likely to be used for?

The end use has not been specified. Underground mines commonly pair large-diameter raises so that one handles intake air or hoisting while the other serves exhaust ventilation or services. At 630 metres deep and 4.5 metres wide, these are permanent infrastructure openings rather than exploration holes, consistent with deeper mining or increased ventilation capacity.

Why does a first contract in Portugal matter to Master Drilling?

Mobilising raisebore rigs, crews and spares into a new country carries a large fixed cost that weighs on margin if spread over a single job. Establishing equipment and trained people in a region lets the contractor bid subsequent work from a standing start, and a completed deep-shaft reference strengthens its position in future prequalification rounds.

Where did equity benchmarks close before this story?

As of the last trade on Friday, 11 September 2026 at 20:00 GMT, the S&P 500 tracker SPY closed at $764.29, up 0.85% from a prior close of $757.83. The Nasdaq 100 tracker QQQ closed at $714.88, up 0.87%, and the Dow 30 tracker DIA closed at $525.79, up 0.97%. Markets were closed.

Sources

• Master Drilling awarded shaft raiseboring contract by Boliden Somincor — International Mining

Photo: Alejandro De Roa · Pexels Licence — source