1.Rock Drilling Eccentric Overburden Casing System ndiyo njira yamakono yomwe imakonda kubowola m'malo ovuta, mwachitsanzo, pamene pali miyala kapena mapangidwe omasuka.Eccentric casing pobowola ndiyo njira yotsika mtengo kwambiri chifukwa mapiko ake anzeru omwe amatha kubweza amatha kugwiritsidwa ntchito pabowo lotsatira.Izi zimapangidwira maenje osaya, monga momwe zimakhalira nthawi zambiri pobowola zitsime zamadzi, zitsime za geothermal, ndi ntchito zomangirira zazing'ono.EDS ndiyabwino pamabowo afupiafupi omwe ali olemetsa.