1. Preliminary report on the (feasibility of) construction of a deep prototype HDR geothermal system in Cornwall: vol. 1 - drilling and casing;Beswick;Camborne School of Mines Report 2B-22,1985
2. New low-speed high-torque motor experience in Europe;Beswick,1982
3. Enquéte sur les progrés récents des techniques de forage à l'air, aux grandes profondeurs avec ou sans marteau fond de trou;Baron;Institut Français du Pétrole Report No. 34061,1986
4. Unique aspects of drilling and completing HDR geothermal wells;Carden;J. Petr. Tech., (May),1985
5. Openhole packer for high-pressure service in a 500°F Precambrian wellbore;Dreesen,1986