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Application Range
It is recommended to drill in rock formation where contains some ovals and fractures.
Design Principles
Make the casing follow easy and the equipment and operation simple
Outstanding Advantages
The stable and reliable working performance and the less vibration of drill rig and flexible to open and close.
Order Guide: A+B+C+D+G
Specifications
A | B | C | D | E | F | G |
Outer Dia. of Casing Tube | Inner Dia. of Casing Tube | Reamed Dia. | Min. Inner Dia. of Casing Shoe | Hammer Type | Drill Pipes | Max. Outer Dia. of Normal Bit |
mm | mm | mm | mm | mm | mm | |
108 | 93-99 | 118 | 86 | TH79 | 76 | 77 |
114 | 101-103 | 127 | 91 | TH79 | 76 | 82 |
127 | 114-116 | 136 | 101 | TH79 | 76 | 92 |
140 | 124-127 | 152 | 117 | TH98 | 76 | 105 |
146 | 127-132 | 154 | 117 | TH98 | 76 | 105 |
168 | 149-155 | 184 | 140 | TH122 | 76,89 | 125 |
178 | 159-165 | 194 | 150 | TH122 | 76,89 | 140 |
193 | 173-180 | 206 | 164 | TH139 | 89,114 | 150 |
219 | 199-206 | 234 | 184 | TH139,TH180 | 89,114 | 165 |
244 | 224-231 | 260 | 210 | TH180,TH220 | 114 | 190 |
273 | 251-257 | 305 | 240 | TH180,TH220 | 114,127 | 220 |
323 | 301-310 | 348 | 284 | TH180,TH220 | 127 | 255 |
406 | 382-388 | 440 | 364 | TH220,TH275 | 140 | 340 |
457 | 433-439 | 488 | 413 | TH275 | 140 | 385 |
508 | 484-490 | 538 | 464 | TH275 | 140 | 440 |
558 | 534-540 | 590 | 514 | TH275,TH398 | 140 | 485 |
610 | 586-592 | 642 | 566 | TH275,TH398 | 168 | 540 |
660 | 636-642 | 694 | 615 | TH398 | 168 | 590 |
711 | 687-693 | 745 | 665 | TH398 | 168 | 640 |
762 | 738-744 | 798 | 716 | TH600 | 168 | 685 |
863 | 839-845 | 900 | 815 | TH600 | 168 | 785 |