Detailed Product Description

Follow-up casing drilling tool with the aid of DTH hammer, eccentric underreaming bit and follow-up casing is used to effectively drill holes in complicated formation such as loose ground, crash layer and gravel etc. These holes often need protecting hole wall.

This drilling tool is applied to complete high pressure jet grouting holes, cement grouting holes, anchor wire holes, drainage holes, blast hole, underwater blast hole, trenchless guided drilling
hole for underground pipe line and cable installation.

This item won National patent

Chinese patent number: ZL022581561

Specifications

Casing size   DTH hammer type   Enlarging hole diameter    Inner diameter of casing shoe
  89                   QCW-70                       92                               69
108                   QCW-80                       111                             86
127                   QCW-80                       132                             102
140                   QCW-100                     145                             112
146                   QCW-100                     152                             120
168                   QCW-130                     175                             138
178                   QCW-130                     185                             147
194                   QCW-150                     211         ≈nsp;                   165
245                   QCW-150                     254                             205
273                   QCW-170                     286                             230