Commonly used with one of our multi-purpose MI3 Massenza rigs. This is an increasingly popular technique of drilling for obtaining windowless samples in soil, over burden and made up ground. Clients favour this method as quality windowless samples can be obtained along with Spt’s and rotary capabilities can be followed hence the multi-purpose rig reference. Our R152 (152mm/ 6’’ O.D.) symmatrex casing system is often used whilst dynamic sampling to case off any loose granular/ made ground should the specific site require it.