| During the production of rod pumped wells, as the factors of the constraint of well body structure, rod and tubing destabilization bend over, nature of production fluid, etc, cause abrasion between rod and tubing, lead to tubing leak and rod parting, and other issues. In the later production stage of low permeability oilfield, the flood effectiveness is poor, pressure decreases and the depth of plunger is increasing, the issue of rod and tubing eccentric wear is becoming more prominent and greatly affects the normal product of oil wells. The home and abroad present situation of rod and tubing eccentric wear and solution is surveyed and studied in this thesis, and the oil wells which exists abrasion in XianHe Oil production plant ShengLi Oil field are detailedly analyzed. The characteristics of rod and tubing abrasion, the mechanism and reasons of abrasion are concluded. The mechanism of eccentric wear is analyzed from the affection of the mechanical wear and corrosion, through mechanical analysis of the rod and tubing, the model of multistage rod destabilization bend over is established and computed, the result can be able to give reference to the design of the rod centralizers. According to the resolving abrasion thinking of righting, low the position of neutral point and improvement the condition of rod and tubing eccentric wear, the techniques of resolving the rod pumped well rod and tubing abrasion are researched, including HDPE tapered tubing technique, righting technique, righting and weighting technique, antisepsis and anti-wear technique, and other assisting matching techniques of resolving abrasion, associating the application of these techniques in XianHe Oil production plant ShengLi Oil field, the mechanism of treating eccentric wear is revealed, and the conditions it can be suit for and its drawbacks are analyzed, the research of thesis has a reference value to improve the application effect of the prevention and control eccentric wear techniques.
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