In the report of scientific and technological innovation of Daqing Oilfield before 2015, the innovation of spare parts equipment was shown in photos. Due to the shooting angle, photos cannot show the details of the equipment. The 3D model made by Solidworks can be rotated at all angles. And all dimensions, details, contour maps and running methods of objects can be shown clearly. At the same time, the generated engineering drawing can be used as the approved drawing of the workshop, which has a strong support for the promotion of equipment. Thus the 3D model can meet the requirements of Daqing Oilfield for display.