Abstract: In the manufacturing process, many of the welding, forging and casting pieces require processing of stressrelief, that is, heat stress relief treatment in the oil machinery, its main purpose is to reduce the residual stress and decrease deformation and cracking of the workpiece. A series of the experiments and researches are conducted on the rigs which are against derrick own planes, the base of derrick ,engine room and linkage plane, and other heavy welding parts in the manufacturing process, the vibratory stress relief technique is applied to the research of the Daqing rig gear linkage II 130, the reasonable parameters determined ,and a reasonable choice given about the exciting force, frequency and time, supporting point ,excitation point and pickup point , satisfactory results achieved in the practical application. It is of great significance to the petroleum machinery manufacturing.

Key words: petroleum drilling machine, residual stress, vibratory stress relief processing, craft research, practical application