Successful launching of the pig is the premise for ensuring the efficiency and accuracy of the
pigging operation. This study investigates the effect of the flow field on pig launching by the …

Mechanical pigging is the most conventional method to mitigate the wax deposition in the
field pipeline. However, wax removal physics of foam pig is still poorly understood. In this …

The yield stress of the wax deposit, characterizing its mechanical strength, provides critical
design basis for pigging. The deposits naturally formed in a pipeline (hereafter,“natural wax …

At present, pipeline inspection gauge (PIG) is the main means to ensure the reliability of oil
and gas transportation pipelines. Due to the unstable friction between the PIG and the …

Horizontal wells are more likely than vertical wells to have enlarged wellbore sections due to
borehole instability. However, there is scarce research on borehole cleaning of horizontal …

In-situ formation and flow of emulsions during nanofluid flooding process is considered
innovative for chemical enhanced oil recovery (cEOR). In this study, a series of nanoparticle …

In our previous article (Gao et al. 2020), a mathematical model including elastic and yield
components but not viscous component was developed to predict the wax plug …

The removal of wax deposit from pipelines is commonly accomplished using pigs. In order to
avoid the formation of wax plugs in pipes, bypass pigs, which create a liquid jet to disperse …

The drainage process of a large drop natural gas pipeline after a pressure test is a
complicated transient flow process. This process is a gas-phase and liquid-phase flow …