Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rig

An automated system for positioning and supporting a work platform of a mobile rig comprising:

• a plurality of support beams connected to the mobile rig, the plurality of support beams having a plurality of support shelves;
• a movable support structure comprising interconnected support members and one or more support rollers, the movable support structure movably connected to the plurality of support beams by the one or more support rollers;
• a work platform movably connected to the mobile rig by the movable support structure;
• a lifting mechanism for raising or lowering the movable support structure;
• at least one support cylinder for positioning and supporting the work platform;
• at least one ratchet locking mechanism for locking the movable support structure at a desired height along the plurality of support beams, the ratchet locking mechanism comprising two opposing support bars designed to rest upon the plurality of support shelves, wherein each support bar is connected to an actuating arm, the actuating arm of each support bar being operably connected to one another via a linkage adapted to pivot about a mid-point of the linkage, thereby actuating the support bars.