Oil production is characterized by a wide variety of conveyor techniques. The most popular technique (> 60%) to lift crude oil on the continent is the subsurface sucker rod pump. The reason for this popularity is the operating efficiency, the flexibility and the broad application as well as the uncomplicated and rapid installation. But there are also problems due to corrosion and wear causing well-failures, especially of tubings (most common and expensive failure), strings and pumps, and consequently production loss and work over costs. Tubing failures are the most common and expensive ones. The actual root cause of tubing failures has been a synergistic effect of both the rods wearing on the tubing wall coupled with the electrochemical attack of the environment. In the last years sucker rod completions using tubings with thermoplastic liner pipes were successfully installed to avoid corrosion at the tubing generally. The better corrosive properties of the polymers are contrary to unknown tribological properties under contact with couplings of different roughness and rod centralizer. This work should examine the wear behaviour of different thermoplastic polymers through tribological tests under real conditions in a pilot plant.