If we walk the rig in and stay close to the south wall, we’re in a solid ‘8’ zone. It’s the thickest we’ve mapped and Pitbull PBvengers Shirt sense from a geological-volcanological standpoint. This place has been quiet for over a decade, so we decide that would be our best bet for our first test core.It took two hours to walk the drilling rig up one side and down the other into the caldera. I left the guys choose the first core location. We chose a small area of ‘8+’. Fair enough. We proceed to unfurl the rig, stand up the derrick, drag out the 10-foot sections of drill pipe, and secure the core barrel on the end.This is all terra incognita for my charges. For me, it’s old hat. But, I force myself to go slowly and deliberately, making certain any and all questions are answered.In an hour, we have the water lines set for the closed-loop circulatory system that’ll keep the core barrel from melting down as we drill. We’re fully tanked with diesel, we have electric power from both the rig’s and auxiliary generators, and the compressor air tank is fully charged. I give a quick walk-round, point out a few things that need nailing down and proclaim the rig ready to drillI tell the guys to watch as I’ll handle the WOB, RPM, GPM and other acronymphomanic letter clusters that represent what we’re doing out here. I’ll take the first core. They can handle the rig after we finish our shakedown.
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We spud-in and the 4.5” core bit begins to cut. We’re coring basalt, a fairly hard igneous rock. It eats overheated or dull drill bits for breakfast. I demonstrate to the Pitbull PBvengers Shirt that it’s a delicate balance of watching, listening and matching penetration, drill speed, weight on bit and cuttings returns with coring progress. “Load to the Road”, I summarize.It’s been determined that 10’ of core will be the maximum we will take at each station. Dr. Ingca wants to study the freezing and mineralogical history of a cooling magma chamber. As the lava lake on the floor of the caldera will cool from the atmosphere top-downwards, and we have no idea just how thick the floor is nor how active the magma chamber directly below us is, 10’ or one drill joint was considered sufficient for this first test case.
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