Structural Improvement Design of HC - 15 Large-diameter DTH of Annular Coring Drilling System

Abstract:

The drilling technology of HC-15 large-diameter down the hole hammer(DTH) of annular coring drilling system is effective to improve the drilling efficiency and to solve the drilling problem of large-diameter pile hole in hard rock.This drilling system adopts distribution pot instead of air distribution case,so the structure of this new type is simple to made,easy to disassemble with good sealing performance.