9/4/2023 0 Comments Drilling hydraulicsThe experimental work of Temple was used to evaluate the model for annular vertical wellbore air drilling flow conditions. Numerical results compared to experimental data were satisfactory. The most efficient numerical scheme is then applied to solve the TFM equation. The Euler equation is used to demonstrate the efficacy of the numerical schemes discussed. ![]() Two hyperbolic model equations: (1) The benchmark Euler equation (2) The mono-dispersed particulate Two Fluid Model (TFM) equation, are presented along with analytical expressions for their decomposed characteristics. ![]() The mathematical representation of the problem involves the solution to coupled non-linear hyperbolic PDE’s and therefore a detailed review of monotone and higher resolution schemes for hyperbolic systems is presented. This model is based on a mono-dispersed particulate two-fluid model (TFM). To this end, a transient numerical pneumatic transport model has been developed to study air/gas drilling hydraulics. While there have been substantial studies and some established techniques for wellbore hydraulics design/analysis for conventional mud drilling, this is not the case for air/gas drilling. Field drilling technicians and drilling engineers designing air/gas drilling projects both typically need to know (1) the time it takes to circulate out a pill of formation material at any given depth in order to reduce drilling time (thereby reducing the cost of drilling) and (2) the optimum rate at which to flow the circulation fluid to ensure the hole is maintained free of cuttings at the minimum capacity (and thereby cost) of surface equipments. Optimal design of any drilling program requires a strong knowledge of drilling hydraulics. Kenneth Steven Brentner, Committee Member Michael Adebola Adewumi, Committee Chair/Co-Chair Mku Thaddeus Ityokumbul, Dissertation Advisor/Co-Advisor Michael Adebola Adewumi, Dissertation Advisor/Co-Advisor
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