OVERBURDEN DRILLING SYSTEMS

TDN SYSTEMS

TDN SYSTEMS

TDN overburden drilling systems are designed to use ring bit which is integrated to casing shoe.
This ring bit set is retrieved for multi use.

TDN SYSTEMS Specification

Model (shoulder type) Casing Size Ring bit Diameter Applicable Hammer
OD ID T OD ID T OD OD
MM INCH MM INCH
TDN190 219.0 209.0 5.0 8.622 8.228 0.197 229 9.02 TG60
TDN215 244.6 220.6 12.0 9.630 8.685 0.472 255 10.04 TG80
TDN560 609.6 584.2 12.7 24.000 23.000 0.500 630 24.80 TG450
TDN760 813.0 789.0 12.0 32.008 31.063 0.472 832 32.76 TG550
TDN1160 1219.2 1168.4 25.4 48.000 46.000 1.000 1239 48.79 TG800

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