...Conclusions Pumps assembled with self-lubricated plungers run successfully in various challenging environments including sand, scale, heavy oil and corrosion. Insert rod pumps assembled with self-lubricated plungers have lasted, on average, more than twice as long as other types...

... was accomplished based on experience at the Teca and Nare fields operated by Omimex Colombia where an artificial lift system shift was performed from Rod Pump (RP) into Progressive Cavity Pump (PCP), achieving significant savings in well downtime and energy comsuption at the same volume of production...