On operational efficiency of sucker rods

Authors: V.A. Klimov, V.M. Valovsky (TatNIPIneft, RF, Bugulma)

Key words: overhaul period of wells, downhole pumping equipment, sucker rod, rod string, stress-strain conditions, residual stress, non-destructive inspection, diagnostics, defect, operational damage, reliability, rate of failure, repair rate, run time, service life.

The paper considers ways to improve efficiency of beam-pumping wells by means of enhanced reliability of sucker rods. The proposed method for operation of sucker rods relies on technical condition of pumping equipment rather than purpose of application. Achievement of the best economic balance between reliability of rod strings and service life of sucker rods combined with technical-condition evaluation maximizes efficiency of downhole pumping equipment. Besides, this method ensures the utmost overhaul period which is defined by natural physical constraints.
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