Abstract: In recent years, with high speed development of Pucheng Oilfield, the water cut has risen, and wellbore conditions have been deteriorated. The artificial lifted wells, which are the main oil producing wells of Pucheng Oilfield shut down frequently and the life of mechanical pumps also became shorter. Well accidents occurred for more than 560 times resulting in increase in maintenance cost and investment in mechanical pumps, and influenced oil field production and management seriously. In order to solve these problems, protection film formed at the walls of the oil tubes and lubricated oil tubes by adding corrosion inhibitor. In addition, a special kind of sucker rods have been used to prevent corrosion and abrasion, and nylon centralizer are applied to rectify the sucker rods, which avoided the hard tubing of steel pipes. With the use of rotary well heads, eccentric wear surface between oil pipe and sucker rod has been changed by artificial force at the surface. Through application of the above mentioned technologies, combining with reasonable production parameters, well accidents has been decreased obviously, long life wells have been increased and tube-pump cost has decreased by 19.3 %.