Influence of Particle Size Distribution on Yield Value and Critical Shear Stress of Mud

Abstract

The relational equation between a grain size distribution of mud and a distance between particles was obtained. We used this relation and the interactive force between particles to obtain the evaluating procedure of the yield value of the field mud. As a result, it has been understood that yield values of mud are in proportion to the -5th power of the distance between particles. This theory was able to explain the decrease of the critical shear stress by the mixture of sand well.