76-114mm Flexible Permanent Symmetrix(symmetric) Overburden Casing System General Introduction Application Range: It is recommended to drill in rock ....
Concentric Casing system with wings Flexible Permanent Symmetrix(symmetric) Overburden Casing System General Introduction Application Range: Applies ....
273mm Concentric Casing System with wings, working with 8inch DHD380 DTH Hammer General Introduction Application Range: Applies to loose covered land ...
219mm Concentric Casing system with blocks. Reliable performance, easy retrieval. General Introduction Application Range: It is recommended to drill ....
Well Drilling Overburden Drilling Systems 2pcs Wings Out Dia 183mm Improvement of wings drilling system 1)The material selection of the sub is better ...
Professional OD 178mm Concentric Drilling System , Reliable DTH Drilling Equipment General Introduction Application Range: It is recommended to drill ...
High Performance Symmetrix Overburden Drilling Systems O.D.168mm Long Life Span General Introduction Application Range: It is recommended to drill in ...