Flow Properties of Fresh Mud (Drilling Fluid) Used in Horizontal Directional Drilling

Fresh mud (uncontaminated by soil or rock cuttings) plays important roles during borehole drilling, and its rheology has been studied for years in the oil and gas drilling industry. However, mud properties in those areas of application are different from mud used during horizontal directional drilling (HDD), one of the important trenchless technologies used for pipe installation. Specialists usually follow their experience or recommendations...