This dataset contains the final technical report for the CSM project, conducted by the Colorado School of Mines and project partners to address materials and wellbore challenges in high-temperature geothermal environments. The report documents research activities carried out to design, characterize, and validate a novel casing and wellbore solution intended for use in geothermal wells. It includes background, modeling, laboratory testing, manufacturing considerations, and performance evaluation under geothermal-relevant pressure and temperature conditions, with results supporting potential deployment in field-scale geothermal applications such as Utah FORGE.