Diamond Drilling, Aircore Drilling, Multipurpose Exploration & Geotechnical Drilling Services Seismic Drilling Australia (SDA) is a highly experienced drilling operation with years of proven expertise, we customize our approach to meet your individual project requirements. SDA is renowned for achieving drill targets from unconventional access points by combining the unique, tight access and low angle abilities of our modern, compact rigs (-20 to -90 degrees) with experienced, innovative staff. As Australia's very first Aboriginal owned and operated drilling contractor, we safely and efficiently deliver our services with minimal environmental impact.