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定向井由于受到井身轨迹的影响,在实施有杆泵抽油时,会发生严重的偏磨现象。合理的加重杆及扶正器设计,成为定向井防偏磨重要的手段。基于对定向井抽油杆微元段受力分析、泵端受力分析,编制了定向井加重杆-扶正器间距设计程序。对现场定向井进行了加重杆扶正器设计演算,能够确定最优加重杆长度,实现扶正器间距设计。输出抽油杆轴向力及侧向力的分布结果,确定定向井偏磨多发的部位,表明该方法合理可靠,有现场应用价值。
Directional wells due to borehole trajectory, the implementation of sucker rod pump pumping, there will be serious eccentric wear phenomenon. Reasonable emphasis bar and centralizer design, become directional well anti-eccentric important means. Based on the stress analysis of the micro-section of the directional well sucker rod and the mechanical analysis of the pump end, a design procedure of the weighted-rod-centralizer spacing of the directional well was developed. The directional well centralizer is designed and calculated for the directional well in the field to determine the optimal weighting rod length and realize the design of centralizer spacing. The results of the distribution of the axial force and lateral force of the sucker rod were output to determine the part of the well that was prone to eccentric abrasion. It showed that the method was reasonable and reliable and had field application value.