- Concentric Casing System with Wings
- 2017-09-28 14:26
- Application Range It is recommended to drill in rock formation where contains some ovals and fracture. Design Principles The stable and reliable working performance and the less vibration of drill rig. Operation Procedure 1. when the drilling starts, the
- Eccentric Odex Casing Overburden Drilling System
- 2017-07-28 18:45
- We are a leading manufacturer of rock drilling tools,like DTH hammers and bits, DTH drill pipes, RC hammers and bits, tophammer button bits, coupling, cross bits, drill rods located in Xiamen,Fujian,China. We are a leading manufacturer of rock drilling to