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)
Thank you for question! Thank @kinkopoly for answer!
This might make someone laugh, but silly me, I never known they can do it and imagined the result reached in different way – drilling in straight lines and diging holes untill they can reach the bore.
after drilling to the required depth, they pull the drill pipe and drill bit and attach a hydraulic motor that can turn the drill bit independently of the drill pipe. They then run it all back down the hole and proceed to turn the bit while drilling to get it to drill in the appropriate direction. After the turn has been made, they pull the string again and remove the motor, then run the string again to drill straight ahead.
Along the way, they use a series of “measure while drilling” tools to ensure that they are on the right heading/angle. There’s a guy on the surface with a laptop making sure that the bit is going in the right direction.
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