... system, drawworks, mast, traveling system and driving devices of truck mounted drilling rig are mounted on a self-propelled chassis ... and manufacturing of workover/drilling rigs, SJ has developed truck-mounted drilling rigs with drilling depth of 3,280' ... load ranging from 253000lbs (1125kN) to 505800lbs (2250kN). The truck- mounted drilling rigs feature heavy working load, reliable performance, good ...