Date of Award
2025
Document Type
Thesis
Degree Name
Master of Science in Engineering (MSE)
Department
Civil Engineering
Committee Chair
Ashraf Al-Hamdan
Committee Member
Michael Anderson
Committee Member
Abdullahi Salman
Research Advisor
Ashraf Al-Hamdan
Subject(s)
Directional drilling, Soils--Mechanical properties, Pressure--Measurement--Mathematical models
Abstract
Horizontal Directional Drilling (HDD) is a trenchless pipeline installation method used in areas where traditional trenching is not feasible due to environmental concerns, existing infrastructure, or other constraints. However, HDD presents significant engineering challenges, with design failures often resulting from excessive installation stresses and Hydro Fracture. Hydro Fracture occurs when the pressure of drilling fluid exceeds the soil’s bearing capacity, leading to unintended subsurface fractures. To mitigate this risk, researchers have relied on the Delft Equation to estimate the maximum allowable mud pressure for borehole stability. However, this equation does have notable limitations and assumptions, which may not accurately reflect real-world conditions. This research will analyze real field data from HDD projects and compare observed results with a simplified equation. The study aims to identify discrepancies, refine predictive models, and propose improvements to enhance borehole stability assessments and reduce the risk of Hydro Fracture in future HDD applications.
Recommended Citation
Clark, India, "Simplified soil-based approach for maximum pressure prediction in horizontal directional drilling operations" (2025). Theses. 737.
https://louis.uah.edu/uah-theses/737
