Product Description: 1. Compact structure of the whole machine with small dimensions meets the requirement of drilling in limited space and tunnel transportation. 2. With two optional drive modes of the drive unit, the drilling rig has a wide adaptability of strata. 3. Extendable mast (or optional box-type mast) is adopted to meet the requirement of long casing drilling construction, which improves the working efficiency. 4. Integrated visualized pressure feeding system can regulate the drilling pressure accurately according to the drilling depth. 5. With the configuration of 4 hydraulic supporting legs, it can realize rapid horizontal adjustment and transportation without crane.