VALLOUREC AND GEOSTOCK SIGN A PARTNERSHIP AGREEMENT TO ACCELERATE LARGE-SCALE STORAGE SOLUTIONS FOR THE ENERGY TRANSITION Meudon, December 18, 2025 – Vallourec, a world leader in premium seamless tubular solutions, and Geostock, a global specialist in underground storage of energy, have signed a Memorandum of Understanding (MoU) to strengthen their collaboration in developing the infrastructure required for the energy transition, particularly for hydrogen and carbon capture, utilization, and storage (CCU ...