Phone. +61 3 5441 1035. Fax Number. +61 3 5441 1305. About us. Press Releases. Regional Offices. Deepcore Drilling provides diamond drilling services to the Australian and Asian Pacific mining and civil engineering industries. We specialise in both underground and deep surface directional drilling, and provide high-pressure dewatering ...We have industry proven, safe, innovative techniques for providing high quality drilling and site investigation services. From sonic drilling with specialized in-situ testing, to mud rotary drilling with sensitive soil sampling, at Mud Bay we deliver a service you can trust across all sectors: geotechnical, environmental and exploration.Hole Volume (gal/100 ft) 36.3 58.3 95.1 Metric Measurement Size NQ™3, NQTT HQ™3, HQTT PQ™3, ... Drilling Parameter Notes 1. All dimensions, weights and volumes shown are nominal ... If 1 and 2 are insufficient (upholes, under powered rigs or too low a series bit), reduce RPM by 1/2 and reduce waterflow. Wait until torque and penetration ...May 01, 2020 · When the sonic head is active and drilling through the subsurface materials, it liquidises any loose soil and can reduce any rock or harder material to a fine dust, meaning there is up to 80% less wastepared with a standard rotary drill as the waste can be confined to the original hole and later returned to its original state.