Follow-up casing drilling tool with the aid of DTH hammer, eccentric underreaming bit and follow-up casing (ODEX tools)

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 drillinghole for underground pipe line and cable installation.This item won National patentChinese patent number: ZL022581561SpecificationsCasing 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

Eccentric Under reaming Bit Drilling Tool Casing