ins.: 2020-07-13 10:08; ( Age: 4 yrs )
Category:
COSC_
COSC: 2020-07-12
Drilling through a thick succession of mafic volcanic rocks has a big advantage: long bit life.
Drilling through a thick succession of mafic volcanic rocks has a big advantage: long bit life. Only now, after 220 m, the drill bit is worn out and has to be replaced. The drillers take the round trip as an occasion for an attempt to do something about the crooked drill pipes: sort out the bad ones and try to straighten them with a hydraulic press.