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Progress Toward an Advanced Geothermal Deep-Drilling System

Description: A previously developed concept for an advanced geothermal drilling system (AGDS) has been extended toward a feasibility design stage. Hardware projects for two percussion, air and hydraulic, hammer drills are underway. Two drill string options and an unique nitrogen supply system are described.
Date: January 1, 1995
Creator: Rowley, J.; Saito, S. & Long, R.
Partner: UNT Libraries Government Documents Department
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