Overburden Systems
The table below is designed to give a quick reference as to the suitable casing sizes for standard overburden systems. The sizes shown for casing overall diameter are maximum diameters, where as the sizes for casing internal diameters is minimum permissible bore size. Because of the versatility of the Bulroc Overburden Systems certain sizes of casing, which are not shown on this table, can be accommodated with slight modifications to the standard system. Should your requirement be for a special system please contact either your local agent or Bulroc direct.
| All dimensions are in millimeters | |||||
|---|---|---|---|---|---|
| System | Drilled Hole Diameter | Closed System Diameter | Body System Diameter | Minimum Casing I/D | Maximum Casing I/D |
| 90 | 124 | 91.4 | 100 | 102 | 114 |
| 115 | 160 | 115 | 122 | 124 | 140 |
| 140 | 188 | 140.5 | 149 | 152 | 171 |
| 160 | 215 | 160.7 | 170.5 | 175 | 193.7 |
| 165 | 215 | 166 | 178 | 184 | 193.7 |
| 190 | 237 | 190 | 200 | 203 | 222 |
| 215 | 276 | 217 | 236 | 240 | 254 |
| 235 | 310 | 236 | 251 | 254.5 | 273 |
| 240 | 310 | 241.6 | 256 | 260 | 373 |
| 280 | 363 | 277 | 300 | 305 | 324 |
| 365 | 458 | 364.5 | 381 | 387 | 408 |
| 460 | 530 | 457 | 475 | 483 | 508 |
| 510 | 580 | 512 | 527 | 534 | 560 |
| 560 | 630 | 561 | 580 | 590 | 610 |
| 610 | 680 | 611 | 630 | 640 | 660 |