... , mast, traveling system and driving devices of truck mounted drilling rig are mounted on a self-propelled chassis for high efficient ... designing and manufacturing of workover/drilling rigs, SJ has developed truck-mounted drilling rigs with drilling depth of 3,280' (1000m ... 3000m) and 13,123'(4000m) which is the largest truck-mounted drilling rig, and static hook load ranging from 253000lbs (1125kN) ...