Abstract: Bead weld, thermal spray coating, electroplating and brush-plating are the main recondition techniques of the metal parts in mechanical equipments. Through the analysis and comparison of the four recondition techniques of metal parts, and in consideration of the failure features of the plunger of the well pump used in a heavy oil well, this paper comes to the conclusion that brush-plating is an optimum method of reconditioning the plunger, and presents the brush-plating technological process and its parameters.

Key words: Deep well pump, Wear, Recondition