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24/09/2022
18/01/2021
Reverse circulation (RC) drilling ⚒️⚒️⚒️
is a type of rotary percussion drilling in which broken rock from the cutting face passes to the surface inside separate tube within the drill stem, this is the reverse of the air path employed in normal rotary percussion drilling, from this the name of technique.
The RC drilling procedure prevents the upcoming sample from the sides of the hole,
So the sample is low contaminated ⚒️⚒️⚒️
23/11/2018