Atlas Copco Overburden Drilling Tools

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Atlas Copco Overburden Drilling Tools

 

Atlas Copco overburden drilling products at Rock Drill Sales and Service. 

 

As much as 90% of the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, silt, sand, gravel and boulders, which varies in depth from a few centimetres to hundreds of meters.

 

Drilling through this so-called overburden is often problematic, due to the tendency of the earth to cave in behind the drill bit.

 

This makes it difficult to retrieve the drill string after the hole has been drilled. In practice, the bore hole is often lost before a casing tube can be inserted to support it.

 

Other problems are caused by cavities or porous ground, which interfere with the circulation of the flushing medium and prevent the drill cuttings from being flushed out of the hole.

 

In places where overburden strata are mixed, or when their drillability is unknown, it is difficult for the driller to decide what tools to use in order to get the best overall results

without risking the loss of equipment in the hole.

 

The best solution for dealing with such problems is to use ODEX equipment.

Out Dia. (A) mm Inner Dia. (B) mm Reamed Dia. (C) mm Inner Dia.of Casing Shoe (D) mm Hammer Type (E) Drill Pipe mm
108 93 - 99 118 87 ROS35/QL30 76
114 102 - 108 123 93 ROS35/QL30 76
127 115 - 117 136 102 ROS35/QL30 76
140 124 - 128 152 115 ROS45/QL40 76
146 130 - 134 154 121 ROS45/QL40 76
168 148 - 156 185 140 ROS55/QL50 89
178 158 - 166 195 150 ROS55/QL50 89
194 174 - 182 211 166 ROS65/QL60 114
219 199 - 207 237 193 ROS65/QL60 114
245 225 - 233 260 210 ROS85/QL80 114
273 253 - 257 308 241 ROS85/QL80 114
325 305 - 309 378 281 SD10/NUMA100 127
Order Guide: Outer Dia.(A)+Inner Dia.(B)+Reamed Dia.(C)+Inner Dia.of Casing Shoe(D)+Hammer Type(E)

 

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