Paper: Controlling Sucker Rod Pin Coupling Failures

As deeper and deeper well are put on the pump, sucker rod strings are being subjected to higher and higher loads. As a consequence, joint failures are becoming more prevalent. This phenomenon is invariably due to corrosion fatigue. An understanding of the stresses and environment under which this occurs will suggest the means of control. Proper tightening procedures, corrosion inhibition, thread form and correct heat treating procedures are discussed.