Research and Development of Tubular Composite Sucker Rods

Abstract

A new design of tubular sucker rods made of fiberglass and carbonfiber have been developed for application in oil production. The results of static tensile tests of samples with a new tubular fiberglass rod and usual solid fiberglass rod are presented. Static tests of samples cut from the rod body were also carried out under cantilever bending. Fatigue curves were obtained and fatigue limits were determined: for solid fiberglass sucker rods of a conventional design, for hollow fiberglass sucker rods, for reinforced fiberglass rods and for  hollow carbonfiber rods as well as for hybrid rods. A finite element model was constructed to evaluate the stress state of the wedge-glue joint. The authors propose to use the finite element method to find the optimal compression force between tube and steel head. Based on tests of prototypes and FEM, the optimal connection parameters were found.