Abstract
The NTNU/SINTEF drillability test method has gained international recognition as a tool for describing
the characteristics of rock and soil materials regarding cutter wear and penetration rates as well as for reliable time and cost estimates. Test results originating from the reference laboratory are unique and NTNU/SINTEF has now registered the Drilling Rate Index (DRITM), Bit Wear Index (BWITM ), Cutter Life Index (CLITM ) and Soil Abrasion Test (SATTM ) as trademarks.
the characteristics of rock and soil materials regarding cutter wear and penetration rates as well as for reliable time and cost estimates. Test results originating from the reference laboratory are unique and NTNU/SINTEF has now registered the Drilling Rate Index (DRITM), Bit Wear Index (BWITM ), Cutter Life Index (CLITM ) and Soil Abrasion Test (SATTM ) as trademarks.