Atlas Copco Symmetrix Bits

32

Atlas Copco Symmetrix Bits
 

Symmetrix overburden drilling systems


Roschen can make Atlas Copco Symmetrix Bits, the quality can be same or be good.
 

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 centimeters 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 drill ability 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. 


 

Out Dia.(A) mm Inner Dia.(B) mm Reamed Dia.(C) mm Inner Dia.of Casing Shoe(D) mm Max Outer Dia.of Normal Bit(F) mm Hammer Type (E) Drill Pipe mm
108 93 - 99 118 86 77 ROS35/QL30 76
114 102 - 104 127 91 82 ROS35/QL30 76
127 115 - 117 136 101 92 ROS35/QL30 76
140 124 - 128 152 117 105 ROS45/QL40 76
146 130 - 134 154 117 105 ROS45/QL40 76
168 148 - 156 185 140 125 ROS55/QL50 76/89
178 158 - 166 195 150 140 ROS55/QL50 76/89
183 163 - 171 193 154 144 ROS55/QL50 89/114
194 174 - 182 211 166 150 ROS65/QL60 89/114
219 199 - 207 237 193 165 ROS65/QL60 89/114
245 225 - 233 260 210 190 ROS85/QL80 114
273 253 - 257 308 241 220 ROS85/QL80 114/127
325 305 - 309 348 281 255 SD10/NUMA100 127
406 382 - 388 440 364 340 SD10/NUMA100 140
Order Guide: Outer Dia.(A)+Inner Dia.(B)+Reamed Dia.(C)+Inner Dia.of Casing Shoe(D)+Hammer Type(E)
本网站由阿里云提供云计算及安全服务 Powered by CloudDream