OVERBURDEN DRILLING SYSTEMS
TDS SYSTEMS
OVERBURDEN DRILLING SYSTEMS
TDS SYSTEMS
TDS SYSTEMS
TDS overburden drilling systems are designed to use ring bit which is not connected to casing shoe.
Special profile DTH Bit passes through enough large inner diameter of ring bit.
TDS SYSTEMS Specification
| Model | Casing Size | Ring bit Diameter | Applicable Hammer | ||||||
| OD | ID | T | OD | ID | T | OD | OD | ||
| MM | INCH | MM | INCH | ||||||
| TDS90 | 114.3 | 101.6 | 6.4 | 4.500 | 4.000 | 0.250 | 121 | 4.76 | TG35 |
| TDS115 | 141.3 | 128.1 | 6.6 | 5.563 | 5.043 | 0.260 | 148 | 5.83 | TG40 |
| TDS140 | 168.0 | 156.0 | 6.0 | 6.614 | 6.142 | 0.236 | 186 | 7.32 | TG50 |
| TDS165 | 193.7 | 181.0 | 6.4 | 7.626 | 7.126 | 0.252 | 214 | 8.43 | TG60 |
| TDS190 | 219.0 | 199.0 | 10.0 | 8.622 | 7.835 | 0.394 | 232 | 9.13 | TG60 |
| TDS215 | 244.5 | 214.2 | 15.2 | 9.626 | 8.433 | 0.598 | 257 | 10.12 | TG80 |
| TDS240 | 273.0 | 253.0 | 10.0 | 10.748 | 9.961 | 0.394 | 293 | 11.54 | TG80 |
| TDS280 | 320.0 | 295.0 | 12.5 | 12.598 | 11.614 | 0.492 | 334 | 13.15 | TG100 |
| TDS315 | 356.0 | 322.0 | 17.0 | 14.016 | 12.677 | 0.669 | 370 | 14.57 | TG120 |
| TDS365 | 406.0 | 374.0 | 16.0 | 15.984 | 14.724 | 0.630 | 420 | 16.54 | TG125 |
| TDS410 | 457.0 | 437.0 | 10.0 | 17.992 | 17.205 | 0.394 | 475 | 18.70 | TG320 |
| TDS460 | 508.0 | 492.0 | 8.0 | 20.000 | 19.370 | 0.315 | 524 | 20.63 | TG370 |
| TDS560 | 609.6 | 584.2 | 12.7 | 24.000 | 23.000 | 0.500 | 626 | 24.65 | TG450 |
| TDS610 | 660.4 | 635.0 | 12.7 | 26.000 | 25.000 | 0.500 | 680 | 26.79 | TG550 |
| TDS660 | 711.2 | 685.8 | 12.7 | 28.000 | 27.000 | 0.500 | 735 | 28.94 | TG550 |
| TDS710 | 762.0 | 736.6 | 12.7 | 30.000 | 29.000 | 0.500 | 782 | 30.79 | TG550 |
| TDS760 | 813.0 | 788.0 | 12.5 | 32.008 | 31.024 | 0.492 | 833 | 32.80 | TG550 |
| TDS810 | 842.0 | 810.0 | 16.0 | 33.150 | 31.890 | 0.630 | 862 | 33.94 | TG550 |
| TDS860 | 914.4 | 889.0 | 12.7 | 36.000 | 35.000 | 0.500 | 938 | 36.93 | TG640 |
| TDS960 | 1016.0 | 970.0 | 23.0 | 40.000 | 38.189 | 0.906 | 1035 | 40.75 | TG800 |
| TDS1010 | 1067.0 | 1016.0 | 25.5 | 42.008 | 40.000 | 1.004 | 1092 | 42.99 | TG800 |
| TDS1160 | 1220.0 | 1169.2 | 25.4 | 48.031 | 46.031 | 1.000 | 1240 | 48.82 | TG800 |
*Other size of TDS system is available upon customer's request.
