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 …

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 …

Fast and accurate kick detection during drilling operations is critical to ensure drilling safety
and reduce non-productive time. Over the years, the industry has taken various approaches …

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

Understanding gas dynamics in mud is essential for planning well control operations,
improving the reliability of riser gas handling procedures, and optimizing drilling techniques …

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

Early detection and characterization of anomalous events during drilling operations are
critical to avoid costly downtime and prevent hazardous events, such as a stuck pipe or a …

Geopolymers have emerged as a promising alternative to Portland cement for oil and gas
wells. Achieving effective zonal isolation by use of geopolymers may require controlling their …

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 …