Abstract:

The linear chain copolymerized alkenes polymer is widely used as a drag reducing agent (DRA) in oil pipeline transportation. However, the molecular weight of the drag reducing agent decreased sharply because of chain fracture, and the decreased effectiveness of drag reducing, known as shear degradation. A new kind of antishearing drag reducing agent was synthesized. The synthesis method, effect of initiator on the monomer onversion, drag reducing rate of associating DRA and antishearing performance were examined. The result showedthat the synthesis process had the advantages of simple operation and mild reaction conditions. The synthesized DRA showed better antishearing performance thanlinear chain copolymerized alkenes DRA. The drag reducing efficiency increased with adding the synthesized DRA and the increasing trend became slower. With concentration increasing, drag reducing efficiency curve of the sheared additives became similar to the unsheared one.

Key words: drag reduction agent; molecular associating; emulsion polymerization; antishearing