油田开发到中后期,综合含水不断升高,地层供液能力变差,平均动液面下降,泵挂不断加深。同时,井况越来越复杂,斜井、大斜度井、水平井和小套管、套管变形井等比例不断加大,管、杆偏磨、腐蚀现象越来越严重,由于管、杆偏磨、腐蚀造成的杆断、杆脱等倒井比例不断上升。机采井维护性作业有相当的比例是由于井斜造成管杆偏磨,导致抽油杆断脱或油管漏失,直接影响油井产量;缩短了检泵周期;增加了油井维护性作业费用;造成大量的油管抽油杆报废。为了有效减少这种损失,通过分析不同井造成偏磨的具体原因,利用防偏磨优化设计软件,研究与应用了全方位立体防偏磨工艺技术,有效地减少了偏磨引起的修井作业,延长了油井的免修期,从而提高油井的生产时率,建立和推广从井口到井底的全方位、立体化的防偏磨思路。 Oilfield development to the late, the integrated water is rising, the formation of liquid supply capacity deteriorated, the average dynamic liquid level down, pump continue to deepen. At the same time, the well conditions are more and more complicated. The proportion of inclined shafts, high-deviated wells, horizontal wells, small casing and casing deformation wells is continuously increasing. The corrosion of pipes and rods is becoming more and more serious. Rod partial wear and tear, corrosion caused by broken rod, rod off the other down the proportion of rising. A considerable proportion of machine maintenance wells are due to deviation of shaft caused by well deviation, leading to the break of sucker rod or the leakage of tubing, which directly affects the production of oil well; shorten the inspection pump cycle; increase maintenance cost of well; A large number of tubing sucker rod scrapped. In order to reduce this kind of loss effectively, by analyzing the specific reasons of eccentric wear caused by different wells, the omnidirectional three-dimensional anti-eccentric wear technology is studied and applied by using anti-eccentric wear optimization design software, which can effectively reduce workover work caused by partial wear , Extending the oil-free repair period, thereby improving the production rate of the well, establish and promote a comprehensive, three-dimensional anti-wear thinking from the wellhead to the bottom of the well.