RE:Just wondering ….At these depths, tripping the core tube will take more than 30 minutes. Penetration rates will be reduced because of depth, but also because of the risk of loosing core. Care has to be taken. Overall i would guess 100 m will take 4 to 5 days assuming no problems. And there will be problems. This is a technically challenging hole, but it can support a lot of wedges for additional hits.