VALLOUREC and GEOSTOCK sign partnership for energy storage solutions

December 19, 2025 1:42 AM EST

Vallourec (Euronext: VK) and Geostock signed a memorandum of understanding to collaborate on infrastructure development for hydrogen and carbon capture, utilization, and storage applications, according to a company statement.



The partnership combines Vallourec's Delphy storage system, which can store up to 100 tons of hydrogen, with Geostock's mined lined rock caverns designed for larger capacities exceeding 500 tons. The companies will focus on hydrogen storage solutions across different capacity requirements.



Under the agreement, the companies will share expertise in well architecture and tubular solutions for hydrogen and CCUS applications. Geostock's subsurface development knowledge will support installation and civil engineering for Vallourec's Delphy solution, while Vallourec will provide tubular solutions for underground storage infrastructure.



The collaboration extends to research and development, with both companies planning to share technical solutions for designing wells suitable for subsurface hydrogen storage and CO₂ injection conditions.



"This partnership marks an important step in strengthening our collaboration with a leading expert in underground storage," said Philippe Guillemot, Group Chairman and CEO of Vallourec. "By joining forces with Geostock, we are accelerating the development of the infrastructure essential to build a performing low-carbon energy value chain in hydrogen storage and CCUS."



Pascal Baylocq, CEO of Geostock, said the partnership enables the company to broaden its solutions for underground hydrogen storage in hard rock. The agreement aligns with Geostock's goal of leveraging Vallourec's expertise in metallic materials across various underground storage techniques.



Vallourec operates in more than 20 countries with approximately 13,000 employees, providing tubular solutions for energy markets and industrial applications. Geostock specializes in underground energy and CO₂ storage across more than 50 countries worldwide.


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