Optimized Corrosion Inhibitors for Wear Mitigation in Rod Lift Systems

Abstract Advancements in directional and horizontal drilling have increased well deviations, intensifying friction, and mechanical wear on rod lift systems, particularly, sucker rod strings and production tubing. In fact, the effect of friction and mechanical wear on sucker rod strings due to reciprocating motion can be significant and has led to an increase in the rate of failures due to wear and corrosion. This paper presents the development of a new generation of corrosion inhibitors upgraded for wear mitigation that have been successfully field trialed in problematic wells from the Permian Basin. The laboratory testing methodologies included tribology for the measurement of friction coefficients and wear and corrosion testing at pressure and temperature based on field conditions. The results of the trials demonstrate the potential of the upgraded corrosion inhibitors to extend equipment life and reduce deferred production in rod lift systems.