In the process of oilfield production, quite a proportion of maintenance operations on mechanical production wells are due to rod breakdown or tubing leaking resulted from borehole deviation and eccentrically worn string.

• 摘要在油田生产过程中，机采井维护性作业有相当的比例是由于井料造成管杆偏磨，导致抽油杆断脱或油管漏失。