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 178.0 158.0 10.0 7.008 6.220 0.394 186 7.32 TG50
TDS165 193.7 181.0 6.4 7.626 7.126 0.252 214 8.43 TG60
TDS190 219.0 194.0 12.5 8.622 7.638 0.492 229 9.02 TG60
TDS215 244.6 225.6 9.5 9.630 8.882 0.374 254 10.00 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 356.0 343.4 6.3 14.016 13.520 0.248 375 14.76 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 0.394 477 18.78 TG320
TDS460 508.0 488.0 10.0 20.000 19.213 0.394 520 20.47 TG370
TDS560 609.6 584.2 12.7 24.000 23.000 0.500 622 24.49 TG450
TDS660 711.2 685.8 12.7 28.000 27.000 0.500 726 28.58 TG550
TDS710 762.0 736.6 12.7 30.000 29.000 0.500 782 30.79 TG550
TDS760 813.0 781.0 16.0 32.008 30.748 0.630 826 32.52 TG550
TDS860 914.4 882.4 16.0 36.000 34.740 0.630 924 36.38 TG640
TDS960 1016.0 988.0 14.0 40.000 38.898 0.551 1032 40.63 TG800
TDS1360 1420.0 1388.0 16.0 55.906 54.646 0.630 1440 56.69 TG900

*Other size of TDS system is available upon customer's request