Brief: The overall structure of the barrel drill is relatively simple compared to other drill tools, but some details and design will have a direct impact on the drilling efficiency.
Brief: The overall structure of the barrel drill is relatively simple compared to other drill tools, but some details and design will have a direct impact on the drilling efficiency.
Brief: Core barrel double shells specially are used drilling for deep, large and toughest pile.Inner core barrel drill first and work as a centerizer .The outer core barrel drill and reaming.Ensuring the verticality of the pile.