GL-6000B type full-hydraulic crawler multifunctional engineering drilling machine for tungsten carbide drilling, auger drilling, down-hole drilling, drilling with casing tube, rotating-jet and other drilling methods with DHH technology. The hydraulic crawler drilling rig can be used in the following projects: tunnel pipe-shed, deep excavation anchoring projects, road and dam consolidation projects, holes for ground-source heat pump, hydrological and well drilling, foundation piles and geological disaster control projects,etc. During operation, the casing drive acts to a down hole hammer. When the hole is formed firstly and until gravity is not enough to make casing follow the underreamer the casing driver sits inactive on top of the casing.
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