Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Hole Cleaning"”.
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Stuck pipe prediction in deviated wellbores: a numerical and statistical analysis.
… this, the use of numerical cuttings transport (hole cleaning) models and statistical analysis of real-time drilling data is proposed by this research. Current cuttings transport models are based on unhindered, free settling in the wellbore and do not adequately account for the effect of vortices …
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Analytical and Numerical Modeling of Mechanical Cleaning Device (MCD) for High Angle Wells
… of these tools is required to determine their hole cleaning efficiency. This report presents a new cutting transport model which includes the effect of pipe rotation. Also, the report presents CFD simulations to determine dissipation of turbulent kinetic energy (TKE) with distance. This TKE is …
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Development of an optimised integrated underbalanced drilling strategy for cuttings transport in gas-liquid flow through wellbore annuli.
… efficiency within wellbore annuli. Annuli cleaning requirements for a concentric annulus was found to be lower than that required for an eccentric annulus for both Newtonian and non-Newtonian fluids. Pipe inclination angle was shown to affect hole cleaning, with the degree of its effect …
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Cuttings transport and hydraulics optimisation for underbalanced drilling (UBD) operations in concentric and eccentric, directional and extended reach wells.
… to achieve an effective pressure-management hole-cleaning operation. In this research, a theoretical, numerical and experimental study was performed to analyse and investigate cutting transport dynamics and wellbore hydraulics. The analytical study involved the development of several …
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Assessment and Modelling of Wear prediction and Bit Performance for Roller Cone and PDC Bits in Deep Well Drilling
… in terms of wellbore instability, cavities, and hole diameter restrictions. Accordingly, more time is needed for the other operations that follow such as: pool out of hole (POOH), casing running, and cementing. Bit wear is considered as the essential issue that influences in direct way on the bit …