Hot New Products Water Drilling Rig Machine Price - Concentric Casing System – TDS
Hot New Products Water Drilling Rig Machine Price - Concentric Casing System – TDS Detail:


A driver bit and a ring are assembled to a complete concentric system bit which is suit for 114-1067mm diameter tube.
Advantage:
1. Enhance penetration and perpendicularity
2. Reduce torque requirements
3. Deal with straight, oblique hole and other angle holes
4. Lowest effect with environment
External dia.(mm): 125/155/188/215/238/276/293/345/375/432…1090
Casing dia.(OD*ID,mm): 114*102/139*127/168*153/194*181…1067*1041
| Outer Dia Of Casing Tube (mm) | Inner Dia Of Casing Tube(mm) | Reamed Dia(mm) | Min Inner Dia Of Casing Shoe(mm) | Drill Pipes(mm) | Max.Outer Dia of Normal Bit(mm) | 
| 114 | 101-103 | 127 | 91 | 76 | 77 | 
| 127 | 114-116 | 136 | 101 | 76 | 82 | 
| 140 | 124-127 | 152 | 117 | 76 | 92 | 
| 146 | 127-132 | 154 | 117 | 76 | 105 | 
| 168 | 149-155 | 184 | 140 | 76 | 105 | 
| 178 | 159-165 | 194 | 150 | 76.89 | 125 | 
| 193 | 173-180 | 206 | 164 | 76.89 | 140 | 
| 219 | 199-206 | 234 | 184 | 89.114 | 150 | 
| 244 | 224-231 | 260 | 210 | 89.114 | 165 | 
| 273 | 251-257 | 305 | 240 | 114 | 190 | 
| 323 | 301-310 | 348 | 284 | 114.127 | 220 | 
| 406 | 382-388 | 440 | 364 | 127 | 255 | 
| 457 | 433-439 | 488 | 413 | 140 | 340 | 
| 508 | 484-490 | 538 | 464 | 140 | 385 | 
| 558 | 534-540 | 590 | 514 | 140 | 440 | 
| 610 | 586-592 | 642 | 566 | 140 | 485 | 
| 660 | 636-642 | 694 | 615 | 168 | 540 | 
| 711 | 687-693 | 745 | 665 | 168 | 590 | 
| 762 | 738-744 | 798 | 716 | 168 | 640 | 
| 863 | 839-845 | 900 | 815 | 168 | 685 | 
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