Fervo Energy and Vallourec are teaming up on a five-year supply deal that could be worth up to $800 million, with the goal of scaling geothermal projects across the United States.

At a high level, this is about locking down the supply chain. Vallourec will act as Fervo’s exclusive supplier for U.S.-made tubulars and VAM® connections, working through distributor Sooner Inc. The companies say everything will be built, tested, and sourced domestically, which is a big piece of the strategy as geothermal starts to scale .

For Fervo, it ties directly into its push to roll out what it calls GeoBlocks. These are standardized 50-megawatt geothermal units designed to be repeatable, not one-off projects. The idea is simple. If you can standardize the build and secure materials upfront, you can move faster and control costs a bit better.

Vallourec’s role is supplying the kind of tubulars that can actually handle these wells. That includes high-temperature, high-torque connections that were originally built for shale but are now being used in geothermal environments. The two companies also plan to work closely on engineering support and field execution, which is usually where things either stay on track or fall apart.

The timing here is not random. Investment in next-generation geothermal has picked up quickly over the last few years, with demand coming from everywhere, especially data centers and electrification efforts that need steady, around-the-clock power . Vallourec says it is already seeing that shift, with geothermal-related bookings jumping significantly in 2025.

On paper, this checks a lot of boxes. Domestic supply chain, long-term agreement, standardized deployment. That is typically what you need if you want to move from pilot projects to something closer to scale.

This is another signal that geothermal is trying to move into a different phase. Less experimental, more repeatable. Whether that actually plays out at scale is the bigger question, but deals like this are clearly part of the push in that direction.