Abstract: Centralizers should be installed on sucker rod in directional well in order to avoid rod'sdirect contaction with oil tubes.Consequently,mechanical analysis of sucker rod string hasbeen complicated,being very different from those in a vertical well.This paper is aimed at thediscussion and mechanical analvsis of sucker rod system in inclined wells in ouasistatic condi-tion,by applying the theory of axial force on a continuous beams combined with bending,pro-viding a preparation for the design of sucker rod system in directional wells.

Key words: directional well, sucker rod, quasistatic process, vertical and lateral bending

摘要： 在定向井有杆抽油系统中,为避免抽油杆柱直接和油管壁接触,必须按照一定的方法安装扶正器.安装扶正器后,杆住的受力与变形分析都不同于直井.本文就准静态条件下,运用纵横弯曲连续梁理论对定向井抽油杆柱系统的受力与变形进行分析,为定向并抽油杆柱的设计提供依据.

关键词: 定向井, 抽油杆, 准静态过程, 纵横弯曲