DRILLING PROCESS AND DEVICE FOR SUBSTERRANEAN STUDY AND EXPLORATION

摘要

abbreviated descriptionthe invention relates to the drilling of a hole for the study ofbasement. the head of roto percussion acts on the tubethe base carries a drill bit. it isseveral of the shirt in whichinjected water drilling. the water and the rock debrisup and out through the evacuation openingthe invention has application to the reverse flow drillingto extract in cores or rock debrisfrom the inside of the tube axially as they arecollected and are not likely to be affected by thethe land previously traversed.