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Deep holes are defined by a ratio between the hole depth and the hole diameter.
Deep hole ratio depths are more than 10x the diameter and up to 150x the diameter ratio.
There are 3 types of deep drilling methods:
Gundrills
STS (Single tube system)
DTS (Double tube system)
Deep hole ratio depths are more than 10x the diameter and up to 150x the diameter ratio.
There are 3 types of deep drilling methods:
Gundrills
STS (Single tube system)
DTS (Double tube system)
