Numerical modeling of the annular failure pressure during HDD in noncohesive soils

• Main Authors: Rostami, A., Kang, C., Yi, Yaolin, Bayat, A.
• Other Authors: School of Civil and Environmental Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Civil engineering; Horizontal Directional Drilling (HDD); Limit Pressure
• Online Access: https://hdl.handle.net/10356/154254
• Institution: Nanyang Technological University

One of the critical issues that engineers, contractors, and owners encounter during horizontal directional drilling (HDD) is inadvertent return of drilling fluid (frac-out or hydraulic fracture) to the ground surface when the annular pressure in the borehole exceeds the yield shear or tensile streng...