Cased Augered
关键词：
Double-walled casings can be used universally, as they are designed especially for transmitting high rotational and vertical forces as created by the rotary drives and oscillators.
The use of double-walled casings ensures a flush drill string.
Casing Drilling System<br> Size: 600-3000mm (Customize)<br> Drill Bit: 25T\B47K\Etc<br> Lead time: 15-20 working days
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