I get the whole process of shielding the actual bore hole using tubes and concrete as well as the use of mud and air systems to remove debris. But how do the actually get the drill head to turn in the ground and what type of pipe are they using to control/send power down to the head?
In: 16
This is a video that i found on the subject
[https://www.youtube.com/watch?v=JAhdb7dKQpU](https://www.youtube.com/watch?v=JAhdb7dKQpU)
(i know this breaks rule 3 and i will post it under a proper top level comment when one gets made)
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