Getting the most out of your core barrel auger
Using a core barrel auger is pretty much the only way to get through those stubborn rock layers that would snap a standard bit in half or just sit there spinning and smoking. If you've spent any time on a drilling rig, you know the frustration of hitting a shelf of limestone or some old buried concrete that refuses to budge. That's usually the moment when the crew realizes it's time to stop fighting the ground and go grab the "big guns" from the back of the truck. ...