English

Vol. 9 6, 2019 p 652-659

Pages

Article name, authors, abstract and keyword

652-659

Degradation-resistant agents reducing hydrodynamic resistance of hydrocarbon liquids

Georgy V. Nesyn a, Marat I. Valiev a, Mursalim M. Gareev b

a Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolsky prospect, Moscow, 117186, Russian Federation

b Ufa State Petroleum Technological University (USPTU), 1 Kosmonavtov Str., Ufa, 450062, Russian Federation

DOI: 10.28999/2541-9595-2019-9-6-652-659

Abstract: Self-repairable drag reducing agents (DRA) that can re-create their active form while passing through the main line pump are discussing in this paper. The macromolecules scission due to extremely high stresses in the pump cause inevitable DRA degradation because of irreversible cleavage of covalent bonds. As to surfactants and supramolecules which linear structures are based on weak interactions (Van der Waals forces, Coulomb interactions, hydrogen bonds etc.) they are capable to self-assembly after the treatment of destructive stresses and to recover their DRA capability.
Self-healing of worm-like micelles in crude oil needs up to one day or more because resins and asphaltenes may interfere micelles formation by the reason of their own surfactant nature. So, resins and asphaltenes may delay the ordered adding of micelle monomers. Linear supramolecules appear to be more convenient for crude oil for the reason that their monomer units are connected to each other with more specific steric interactions. They call them complementary interactions, when the head of one unit corresponds to the tail of the next one. Hybrid structure is one more type of degradation-resistant DRA. Here short chains of classic polymers are associated among themselves with week interactions. Thus, a structure resembling a ladder is formed, which is also capable of self-assembly.
DRA of this type can be active along the whole pipeline despite of pumping station number.

Keywords: molecular-chain scission, critical shear stress, worm-like micelles, self-assembly, supramolecules, complementary monomers, hydrogen bonds, Van der Waals forces, Coulomb interactions.

For citation:
Nesyn G. V., Valiev M. I., Gareev M. M. Degradation-resistant agents reducing hydrodynamic resistance of hydrocarbon liquids. Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktovScience & Technologies: Oil and Oil Products Pipeline Transportation. 2019;9(6):652659.

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