The influence of asphaltenes and resins on drag reducing additive efficiency

Study of the Rheological Properties and Flow Process of High-Viscosity Oil Using Depressant Additives

“…Numerous studies by scientists have established [3,20,21] that the coefficient of hydraulic resistance is in a complex dependence on many factors, including the state of the surface (roughness) of the pipe walls as well as the nature (mode) of the fluid flow.…”

“…Gubin, B.A. Tonkoshkurov, N.M. Gostev, and others [3,15,16]. The models of hydraulic resistance coefficients and internal heat transfer proposed in them for the generalized Bulkley-Herschel law are similar to the dependences for the Shvedov-Bingham viscoplastic fluid but differ in the expressions of the modified dimensionless criteria of Reynolds, Prandtl, Grashof, and Nusselt as well as the empirical coefficients in determining the hydraulic resistance [21][22][23].…”

“…A promising and developing method of transporting non-Newtonian fluids, at present, is the transport of high-viscosity oil with the addition of anti-turbulent and depressant additives. The analysis of materials [2][3][4][5][6] proves that the selected heating temperature affects the efficiency of oil pumping, since when laying above ground, the thermal field shifts along the cross-section of the pipeline. The use of additives makes it possible to reduce the oil heating temperature and improve its rheological characteristics, but it is worth noting that additives must be selected for each type of oil in order to ensure a rational operation of the pipeline.…”