Eavor Demobilizes Rigs from Geretsried: What It Really Means for Closed-Loop Geothermal For three years, two drilling rigs on a farm estate near Geretsried, a Bavarian town about 40 km south of Munich, stood as the symbol of the world's most ambitious closed-loop geothermal experiment. Now in October 2026, Eavor Technologies, the Calgary-based developer of the Eavor-Loop, has told the town and its heating utility that both rigs would leave the site . The company said keeping idle rigs and specialist services on site was costly, and that releasing them would help put the project in the strongest position to continue with Loop 2 once its commercial structure is reworked . On the surface, this is a logistics decision. Underneath, it is one of the clearest signals yet about where first-of-a-kind geothermal technology stands, and how hard it is to turn a technical proof into a bankable business. This article explains exactly what happened, what the move means and what it does not mean...
Eavor Demobilizes Rigs in Geretsried: What It Means for Closed-Loop Geothermal Investors, Heat Markets, and Project Risk
Eavor Demobilizes Rigs from Geretsried: What It Really Means for Closed-Loop Geothermal
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For three years, two drilling rigs on a farm estate near Geretsried, a Bavarian town about 40 km south of Munich, stood as the symbol of the world's most ambitious closed-loop geothermal experiment. Now in October 2026,
Eavor Technologies, the Calgary-based developer of the Eavor-Loop, has told the town and its heating utility that both rigs would leave the site . The company said keeping idle rigs and specialist services on site was costly, and that releasing them would help put the project in the strongest position to continue with Loop 2 once its commercial structure is reworked .
On the surface, this is a logistics decision. Underneath, it is one of the clearest signals yet about where first-of-a-kind geothermal technology stands, and how hard it is to turn a technical proof into a bankable business. This article explains exactly what happened, what the move means and what it does not mean, and what investors, utilities and the wider geothermal sector should watch next.
What Eavor Actually Announced
The facts are narrower than some headlines suggest.
Eavor is releasing two drilling rigs from Geretsried. It is not shutting the plant down. The existing loop keeps operating, and Eavor says it is refocusing the project's commercial structure on selling heat . The company says Geretsried remains a priority project and that it is negotiating a firm heat offtake agreement .
What has changed is timing. Construction of the second loop, the second of four planned, is postponed indefinitely, and no restart date has been set (BR24). Eavor had originally hoped to begin Loop 2 drilling in March 2026, but the evaluation phase after Loop 1 took longer than planned (ZfK).
So the short answer to "what does this mean?" is this: Eavor has stopped paying for drilling capacity it cannot yet use, because the money, the partners and the heat contract needed to drill Loop 2 are not yet in place.
Why the Rigs Were Still There
To understand the rig demobilization, you need to know what the rigs were waiting for.
The Geretsried design called for four Eavor-Loops, each with 12 lateral pairs about 6 km long, for roughly 72 km of reservoir exposure. The surface plant was sized for 8.2 MW of electricity and 64 MW of heat (Eavor). Two rigs supplied by KCA Deutag drilled Loop 1 between July 2023 and October 2025, which works out to about 27 months against an original plan of 107 drilling days (Autonocion).
The rigs were kept on site because the plan was to move straight into Loop 2. In May 2026, Eavor CEO Mark Fitzgerald said the company was working to secure the best path forward quickly, partly because the two rigs that drilled the initial wells were still standing at Geretsried . Five months later, with no additional financing or firm offtake publicly confirmed, the cost of standby won out.
Eavor has not disclosed what the rigs cost per day on standby . Any specific daily figure you see quoted online should be treated as an estimate, not a reported number.
What Went Wrong Underground
Eavor deserves credit for publishing an unusually candid technical update in May 2026, written by co-founder and CTO/COO Matt Toews. It identifies three main problems.
1. Poor cementing of the motherbores
Efficient Eavor-Loop construction depends on two rigs drilling in parallel, with each lateral pair drilled from both sides at once and intersected deep underground. After the second lateral pair, Eavor measured fluid flowing between the two rigs. The root cause was poor cement on both cased vertical "motherbores," which created a channel behind the casing linking the lateral pairs (Eavor).
That forced Eavor to drill with one rig at a time, which the company says effectively doubled time and cost (Eavor). It also allowed cuttings-laden drilling fluid to flow back into previously drilled laterals.
2. Debris in the laterals
Five of the six lateral pairs ended up with mud and cuttings inside them. Eavor flushed three of those and confirmed the result with production logging, but chose not to clean the first two pairs because the cost and time were prohibitive (Eavor). Because of the impact on cost and schedule, Eavor stopped Loop 1 at six lateral pairs instead of the 12 in the original design. Four pairs are now operating as expected.
3. Drilling fluid and drilling dynamics
The original mud system, based on successful hydrothermal wells in southern Germany, was poorly suited to some of the carbonate formations, creating hole-cleaning problems and stuck-pipe risk. Hard rock, long laterals and high friction also caused shock, vibration and tool damage (Eavor). SLB's head of drilling engineering, Blaine Dow, also noted that the rigs had barely worked in the previous four years and that the crews were mostly new .
The Output Gap in Plain Numbers
This is where the Geretsried story gets most attention, and most confusion. Here are the reported figures side by side.
Two points matter for a fair reading.
First, the comparison of "2 MW versus 8.2 MW" is not like-for-like. The 8.2 MWe figure is for four complete loops with 48 lateral pairs as per the original design. Today there is one partial loop with four working pairs. Eavor says that configuration should deliver roughly a third of one full loop's heat (Eavor), which is about one-twelfth of the full project (Autonocion). Eavor argues that heat output per pair matches its pre-drill predictions.
Second, the electricity numbers are still weak. The Turboden ORC plant was sized for the full project, so it is badly oversized for one partial loop. Fitzgerald said plant efficiency was only about 2% with so few loops contributing, and could rise to 14% if more loops came online. When the plant uses roughly as much power as it makes, net grid supply is close to zero most of the time.
In short, the subsurface heat model appears to be working. The construction speed, the capital cost and the amount of reservoir actually built are what fell short.
The Money Behind the Move
Rigs are withdrawn when capital gets tight, and Geretsried's capital story is the real driver here.
The project was backed by a €91.6 million grant from the EU Innovation Fund and a European Investment Bank loan of up to €45 million (BR24). According to Eavor, the original budget for the overall project, comprising four Eavor Loops, was approximately €350 million. Around two-thirds of this amount has been made available to date. This covers not only the completion of Loop 1, but also the entire infrastructure and the above-ground facilities for the overall power plant concept.
The project was awarded €91.6 million in funding from the EU Innovation Fund. Payments are made in instalments linked to the achievement of contractually agreed milestones. The most recent payment was made following the successful commissioning of the first Loop. Further payments will be made as subsequent project milestones are achieved. The final funding instalment will be paid following successful completion of the overall project, during the subsequent ten-year monitoring period. This is subject to annual verification of the GHG avoidance agreed in the Grant Agreement. A delay in full commissioning does not affect the total funding amount. It only requires an adjustment to the project timeline and payment schedule under the EU Innovation Fund.
From Operator to Technology Provider
The rig release is the physical result of a strategic shift that started in spring 2026.
In May, Eavor cut its headcount from 147 to 80 and said it would step away from being the primary developer for future projects. "We see ourselves as a technology provider," Fitzgerald said, "as we believe that other parties may be more capable of the operational side of things" .
He also said: "We believe that we have proven the concept. We now have to prove commerciality."
This needs a precise reading. Eavor is not giving up its stake in Geretsried. Fitzgerald later stressed, "We are not stepping away from Geretsried. Let me be clear on that," and said the company's ownership position and commitment to finishing the project remain unchanged (ThinkGeoEnergy). What is changing is who carries the drilling and execution risk. Eavor wants partners with deep multilateral drilling experience to build future loops, while it focuses on engineering, technology, and its proprietary tools.
Those tools are real assets. The Eavor-Link™ Active Magnetic Ranging (AMR) system puts ranging into the drilling assembly so wells can be steered together while drilling. Using it, Eavor hit first-attempt intersections on all six lateral pairs at about 8 km measured depth (Eavor). Its Rock-Pipe™ sealant cut near-wellbore permeability by more than an order of magnitude, and leak-off has stayed between 0.5% and 2% of circulating fluid (Eavor).
What It Means for Geretsried
For the town, the impact is immediate. Isar-Loisach-Naturwärme (ILN), the district heating subsidiary of Stadtwerke Geretsried, called the delay "a severe setback for Geretsried" and said there is currently no reliable commitment from
Eavor to build the second loop .
Loop 2 was the precondition for district heating. The town has been waiting to build its heat network until that loop is finished (ZfK). ILN signed a heat supply agreement with Eavor in 2024 for 81,200 MWh per year , and it now says it will reassess how to secure heat, including continued work with Eavor and alternative or supplementary sources. The city has also criticised Eavor's "sluggish communication," saying it was informed at very short notice .
That matters beyond Bavaria. In 2023, then-Chancellor Olaf Scholz called the project a "technical masterpiece" during a site visit (BR24). When a showcase project stalls, the political and reputational cost lands on the whole next-generation geothermal sector, not just one company.
What It Means for Closed-Loop Geothermal
It would be wrong to read the rig withdrawal as proof that closed-loop geothermal does not work. It would be just as wrong to read it as a minor pause.
What Geretsried proved
Long laterals can be drilled and intersected reliably at about 8 km measured depth, with first-attempt intersections on all six pairs (Eavor).
Heat output per lateral pair matched Eavor's predictions, at more than 2 MWth per operating pair (Eavor).
The learning curve is steep and real. Average drilling time fell from 54.5 days per pair for the first four pairs to 16.5 days for the last two (Autonocion), and Eavor expects future pairs to take about three weeks each (Eavor).
What Geretsried has not yet proved
That a full Eavor-Loop can be built on budget and on schedule.
That electricity from closed-loop systems in average-gradient rock can compete without much deeper, hotter wells. Eavor itself says depth is the key lever, pointing to 20 MWe at 15 km depth in a 30°C/km gradient versus 2 MWe at Geretsried, and admits current drilling technology hits limits below about 9 km true vertical depth (Eavor).
That a third-party driller will accept the construction risk on commercial terms.
The most realistic near-term market is heat, not power. Eavor says its economics are already competitive for European district heating, based on the last two lateral pairs drilled . That fits with its decision to refocus Geretsried on heat sales.
It is important to note that the existing Loop already provides a continuous thermal output of 8 MW. This represents a significant source of clean and reliable heat that can be utilized once a suitable heat offtake opportunity has been secured.
What to Watch Next
For investors, utilities and policymakers, these are the five signals that will decide whether the rigs come back:
A named drilling or operating partner. Eavor has said it is in talks with candidates but has not named any .
A firm heat offtake agreement with ILN or other buyers, replacing the 2024 contract terms that ILN says have shifted.
New project financing for Loop 2, and clarity on the status of the EU Innovation Fund grant.
ILN shareholders' decision on whether to continue with Eavor, turn to other heat sources, or both (Autonocion).
Eavor-Loop 2.0 projects in crystalline basement rock, which Eavor says it and its partners are actively developing for heat and power markets (Eavor).
The Bottom Line
The rigs may be moving but Eavor is not walking away from Geretsried, nor is it admitting the physics failed. It is admitting something more ordinary and, for the industry, more important: a first-of-a-kind project ran out of time and needs to preserve capital to reach its designed scale, and the next phase cannot start until someone else shares the risk.
Loop 1 delivered what Eavor calls a technical proof of concept: precise deep intersections, predictable heat per lateral pair and a fast-improving drilling curve. It has not yet delivered r the 8.2 MW plant the town, the EU, and investors were promised, and the district heating that Geretsried planned around is now on hold.
The rigs leaving Bavaria mark the end of Eavor's first chapter as a builder-operator. Whether Geretsried becomes the template for closed-loop geothermal or a costly lesson will depend on what happens at the negotiating table, not on the drilling floor.
Source: Email Correspondence From Eavor Technologies
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