How deep drilling(oil, etc) avoids drill twisting on its axis? Wouldn’t kilometers long steel drills be akin to licorice?
In: 1257
Certain drilling applications also utilize a piece of downhole equipment called a mud motor. This is essentially a helical rotor inside a tubular. The tool sits at the bottom of the drill string below the collars. Drilling fluid or mud is pumped down the drill string and through the mud motor; the pressure of the drilling fluid spins the rotor inside thus creating concentric power to spin the drill bit. They are not used in all drilling applications but rather mainly for hard rock formations and directional drilling applications wherein the driller and MWD (measure while drillng) hands will “steer” the drillstring into the zone they want it. These tools are most often used in conjunction with PDC type drillbits. Check out this Wikipedia article. https://en.m.wikipedia.org/wiki/Mud_motor
Edit: spelling
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