Abstract:

Having monitored the bed test and the wear test of materials of mud pump s liner/piston by the ferrography analysis technique, and analysed the wear debris in the mud used in the field, we discovered the debris produced during the wear process of liner and piston is mainly the normal wear debris, the wear debris characterized by fatigue and adhesion, and a bit of the cut wear debris. These three kinds of debris indicate that the wear between liner and piston is a composite form of fatigue wear, adhesive wear and abrasive wear.