
Rock Drilling Eccentric Overburden Casing System Odex DHD350A-168mm Drill Bit with Good Quality. Stable Drilling in Loose Formation: Prevents hole collapse and tool damage in unstable overburden rock layers. One-Step Drilling and Casing: Simultaneously drills and installs casing tubes for efficient operation. Retrievable Drill Tools: Reamer swings in to allow easy retrieval of the drill bit assembly. High-Strength Materials: Constructed from special alloy steel and premium tungsten carbide buttons. Wide Diameter Range: Supports reaming diameters from 118mm to 378mm for various well sizes. CE Certified Quality: Product meets CE certification standards for safety and reliability. Simple Structure Design: Easy operation with reliable quality and long service life. OEM/ODM Service Available: Manufacturer offers custom services for specific project requirements.