Abstract: A Buckling-resistant Sucker Rod for well pumps. The present invention comprises a sucker rod assembly in which the rod itself is held in tension between opposing fittings, and in which a sleeve surrounds the rod, occupying the space between the fittings. In one version, the buckling-resistant rod is assembled such that the end fittings are placed under tension prior to the installation of the sleeve, In another version, the sleeve is designed to be extendable until it places the rod segment under tension by pressing outwardly on the end fittings. Thus, the sleeve, or the combination of the sleeve and its extension, can absorb all compressive forces transmitted through the fittings, while the rod remains in a condition of tension. The invention enhances the efficiency of oil well operation, by using light-weight sucker rods, while minimizing down time due to breakage of the rods.

Abstract: A Buckling-resistant Sucker Rod for well pumps. The present invention comprises a sucker rod assembly in which the rod itself is held in tension between opposing fittings, and in which a sleeve surrounds the rod, occupying the space between the fittings. In one version, the buckling-resistant rod is assembled such that the end fittings are placed under tension prior to the installation of the sleeve, In another version, the sleeve is designed to be extendable until it places the rod segment under tension by pressing outwardly on the end fittings. Thus, the sleeve, or the combination of the sleeve and its extension, can absorb all compressive forces transmitted through the fittings, while the rod remains in a condition of tension. The invention enhances the efficiency of oil well operation, by using light-weight sucker rods, while minimizing down time due to breakage of the rods.