Borehole Drilling Method

sidewall core mechanical

notation 8.2 more like this
definition Mechanical tools use hollow rotary drills to cut and then pull out core plugs. Up to 75 plugs can be recovered on one run. With full recovery, cores from typical percussion tools are 2.5 cm in diameter by 4.4 cm long, while those from mechanical tools are 2.3 cm in diameter by 5 cm long. The latter are also known as rotary sidewall cores. more like this
source This vocabulary more like this
broader sidewall core
narrower sidewall core mechanical
in scheme boreholedrillingmethod
is primary topic of sidewall core mechanical