Hard Rock Drilling Performance Improvement as Result of Systematic Approach for Drill Bit and BHA Selection

Using a systematic approach for selection of drill bits, including testing on basalt rock samples and up front use in test wells, leads to significant improvement of performance. Additional focus on modeling and planning of BHAs (Bottom Hole Assemblies) improve stability and enhance drill bit performance by improving drilling conditions. The combination of well stabilized drilling assemblies and vibration mitigating tools in the BHA lead to more stable drilling conditions and efficient use of energy to provide improved progress rates. Additionally, mitigation of high vibration levels reduces the risk of bit damage and downhole tool failures, thus resulting in longer runs between trips. During drilling of the well, comprehensive use of vibration measurement tools in the BHA supported continuous enhancement and provide learning’s for subsequent wells.