Semi-empirical fouling models have proven more effective in predicting the behavior of crude oils heat exchangers. These aided refineries optimizing operating conditions to minimize or eliminate preheat Despite their complexity, continue improve approximating real by taking into account previously neglected aspects. This paper summarizes these findings from various studies along with highlighti...

state, heat/mass transfer between gas and liquid, fluid hydrodynamics in the wellbore depend highly on temperature pressure conditions, multiphase flow behaviors deep-stratum deep-water wellbores become much more complicated. Different from conventional oil exploitation, production of deep stratum regions involves multiple complex physical phenomena, such as phase transition (gas-liquid-solid-s...

Nowadays, magnetic gears (MGs) have become an alternative choice for mechanical gears because of their low maintenance, improved durability, indirect contact between inner and outer rotors, no lubrication, and high efficiency. Generally, although these advantages, MGs suffer from inherent issues, mainly the cogging torque. Therefore, cogging torque mitigation has become an active research area....

The conditions of petroleum extraction may allow asphaltenes to precipitate, causing deposition that clogs wells, pipes and equipment, consequently reducing productivity. In this work, the solubility parameters precipitation onset polar fractions heavy crudes from Brazilian fields were estimated using a simplified system n-heptane/toluene mixtures. Asphaltenes extracted by two different methods...

a new chemical compound is developed at petroleum university of technology to enhance therecovery of the free imbibition process and simultaneously hinder asphaltene precipitation. thecompound is tested on heavy oil samples from marun oil field, bangestan reservoir. the effects ofthe chemical compound on viscosity, hydrocarbon composition, and average molecular weight ofthe heavy oil are invest...

5