Abstract
Sucker rod and tubing strings in highly deviated oil wells are subject to severe impacting and sliding wear as they interact during cyclic pumping operations. A large-scale wear test machine with multiple test cells has been designed and manufactured to test actual tubing, rod and coupling specimens under simulated operating conditions. In addition, tests are also performed in a small-scale wear test rig. The effects of stroke rate, contact load and wellbore fluid on wear rates of sucker rod/production tubing components are studied. Test results have shown that the stroke rate and contact load influence the transition from mild to severe wear. A field study program has been undertaken in parallel with the laboratory wear study to determine the variety and extent of production wear problems.
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