... wells if equipped with a rotary table. A self-propelled workover rig is mainly composed of chassis, power and ... Well-known engine and hydromechanical transmission are adopted. Self-propelled chassis will be more suitable for complicated oilfield conditions. ... are standardized, thus different equipment can share parts. Self-propelled Workover RigsXJ150 Workover Rig XJ250 Workover Rig XJ350 Workover ...