Polyacrylamide (PAM), general known as flocculants, is the linear polymers with the molecular weight between 5-25 million. Its solid product appearance is white or slightly yellow powder, while its liquid is no colored viscous emulsion. This products is easily soluble in water and decomposed when the temperature is more than 120 ℃.  The positive group (-CONH2) in polyacrylamide molecule could easily adsorb and bridge with the dispersion of suspended particles in the solution which makes it a strong flocculation characters. That’s why polyacrylamide could be widely used in water treatment, paper, mineral processing and other fields. While what we discuss today is not about the application as above fields. Polyacrylamide could also be used be effective friction reducer in Oil & Gas field . Friction reducer, or called drag reducing agents are the agents that could reduce the resistance of a fluid to transport which are mostly water-soluble or oil-soluble polymer. Actually 20...

The concept of drag reduction was first proprosed in the 1940s. In the early 20th century, firefighters in New York used water-soluble polymers to increase the flow of the drainage system. In 1948, a small amount of polymethyl methacrylate (PMMA) was dissolved in chlorobenzene, and the friction resistance could be reduced by about 50%. In the late 1960s, oil producers in the United States were able to use the drag reduction agent to transport and improve the delivery of crude oil pipelines across the Asga pipeline and it did a huge success. After that, the technology of drag reduction is further developed and widely used. In the 1980s, China also began to develop and test domestic anti-drag agents and carried out medium-sized tests on domestic crude oil pipelines. The performance of products had reached the level of foreign countries in the early 1970s. In recent years, the Petrochina Pipeline R&D Centerhas carried out the research work of drag reduction agent, and h...