Classic bit kinematics - 3. Pure rolling of bit cones doubles performance
Application of trenchless methods for pipelines renovation on mining areas
Somport-Tunnel: dritte Hauptverkehrader zwischen Frankreich und Spanien
North Sea operators drilling varied projects. Drilling market focus
Latest innovations in surface mining
Based on Numerical Simulation to Investigate the Process of Gas Explosion Accident in Coal Mine
Using the hypergeometric model to analyze the buckling of drillstrings in curved boreholes
Foamed cement job successful in deep HTHP offshore well
Die Stahlberger Grubenbahn : auf schmaler Spur von Müsen nach Dahlbruch