Borehole Drilling Method

Geoprobe core

notation 4.2.2 more like this
definition A proprietary type of direct push drilling. High quality core is extracted by hydraulic power. Used in rough terrain, soft sand, mud, shallow water, or tight, congested areas. Long high quality cores. more like this
source This vocabulary more like this
broader direct push
narrower geoprobe core
in scheme boreholedrillingmethod
is primary topic of geoprobe core