The relationship between shale toughness and its mechanical parameters is of significance for predicting the shale toughness at a great depth based on the geoph
Rock drill-ability anisotropy has significant effects on directional drilling and deviation control. Its evaluation is an important but difficult research subje
Four microorganism strains were isolated from coastal petroleum-polluted soil and sand samples of Bohai Sea oilfield; they were found to degrade marine oil spil