Lol what in the wild world of back of the napkin maths is this? Sonic drilling for heatpumps?<p>Lol way overpriced and definitely not suitable for all ground types.<p>BQ core drill on a udr1200 is what ya want. HQ Rock roll for the first 20m or til you hit solid, leave the casing in and then slam down that first hundred in NQ then switch to BQ for everything deeper. You'd need probably two trucks just for tailings from the cut. You gotta pump mud down, bring it back up, floc drop the particles out and recycle it back down the hole. Could do it using a series of tanks on some trucks for cleanliness and transportability.<p>Look in good ground you'll get 100m with a killer crew in a 12 hour shift. In shit ground you'll get 20m. Whatever you do only take rock doctor (geologists) reports with a God damn Boulder of salt. Those Muppets only have the vaguest idea of what to expect down hole. They over exaggerate how much they know about what's under the ground and what effect it will have on drilling. Their whole field it hypothetical when it comes to drilling. They got nfi until after the jobs done.<p>Source. Worked on a prototype deep hole drill rig and a bunch of udr1200s punching holes in and around Wiluna,WA. Deepest was >1600m.