Motivated by a dearth of research on the dynamics of single Taylor bubbles in annular
conduits, a computational study of Taylor bubbles rising in vertical and inclined annuli is …

This study numerically investigates counter-current slug flow by considering the motion of a
Taylor bubble in annular conduits with downward-flowing liquids using the Volume-of-Fluid …

Addressing gas migration in a static mud column during the shut-in period is a major
concern in Pressurized Mud Cap Drilling (PMCD). Significant discrepancies have been …

This study aims to provide the design and calculation method of key parameters in
bullheading/PMCD operations. An improved gas migration velocity model in closed well …

Reducing energy consumption during drilling operations is beneficial to both the
environment and economy. Frictional drag reducers (FDR) are widely used to reduce the …

In this study, fluid viscosity effects on LSP performance in terms of boosting pressure were
numerically investigated. A water–glycerin mixture with different concentrations …

Eccentricity of the casing frequently exists in actual drilling process. This is one of the main
reasons responsible for poor mud and cement displacement. In such cases, zonal isolation …

Led by new developments of horizontal drilling and hydraulic fracturing techniques, organic
rich shales have been contributing significantly to a gas production in the US. In drilling …

In horizontal configuration, the gas-liquid intermittent flow can be plug flow or slug flow.
Different works have demonstrated that the two flow patterns, despite their similarity, are …

Drilling is essential to extract subsurface hydrocarbons and geothermal energy, or store
waste fluids/gases underground. Drilling efficiency directly affects the economics of well …